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    <link:label id="lab_us-gaap_AssetsCurrentAbstract_1723771C6C67FF3534FFA1868A9C7C1C_terseLabel_en-US" xlink:label="lab_us-gaap_AssetsCurrentAbstract_1723771C6C67FF3534FFA1868A9C7C1C" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">CURRENT ASSETS</link:label>
    <link:label id="lab_us-gaap_AssetsCurrentAbstract_1723771C6C67FF3534FFA1868A9C7C1C_label_en-US" xlink:label="lab_us-gaap_AssetsCurrentAbstract_1723771C6C67FF3534FFA1868A9C7C1C" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Assets, Current [Abstract]</link:label>
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    <link:label id="lab_us-gaap_CashAndCashEquivalentsAtCarryingValue_EB2FE1A34D6B4CC9EB7EA1868A9C1838_terseLabel_en-US" xlink:label="lab_us-gaap_CashAndCashEquivalentsAtCarryingValue_EB2FE1A34D6B4CC9EB7EA1868A9C1838" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Cash and cash equivalents</link:label>
    <link:label id="lab_us-gaap_CashAndCashEquivalentsAtCarryingValue_EB2FE1A34D6B4CC9EB7EA1868A9C1838_label_en-US" xlink:label="lab_us-gaap_CashAndCashEquivalentsAtCarryingValue_EB2FE1A34D6B4CC9EB7EA1868A9C1838" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Cash and Cash Equivalents, at Carrying Value</link:label>
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    <link:label id="lab_us-gaap_AccountsReceivableNetCurrent_74FEE130F25BBFD8B064A1868A9CB21D_terseLabel_en-US" xlink:label="lab_us-gaap_AccountsReceivableNetCurrent_74FEE130F25BBFD8B064A1868A9CB21D" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Trade receivables, net</link:label>
    <link:label id="lab_us-gaap_AccountsReceivableNetCurrent_74FEE130F25BBFD8B064A1868A9CB21D_label_en-US" xlink:label="lab_us-gaap_AccountsReceivableNetCurrent_74FEE130F25BBFD8B064A1868A9CB21D" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Accounts Receivable, Net, Current</link:label>
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    <link:label id="lab_us-gaap_OtherPrepaidExpenseCurrent_66102F4D328D530E3039A1868A9CC946_label_en-US" xlink:label="lab_us-gaap_OtherPrepaidExpenseCurrent_66102F4D328D530E3039A1868A9CC946" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Other Prepaid Expense, Current</link:label>
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    <link:label id="lab_us-gaap_IncomeTaxesReceivable_8D9508C70DF76216F60CA1868A9C0985_terseLabel_en-US" xlink:label="lab_us-gaap_IncomeTaxesReceivable_8D9508C70DF76216F60CA1868A9C0985" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Income tax receivable</link:label>
    <link:label id="lab_us-gaap_IncomeTaxesReceivable_8D9508C70DF76216F60CA1868A9C0985_label_en-US" xlink:label="lab_us-gaap_IncomeTaxesReceivable_8D9508C70DF76216F60CA1868A9C0985" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Income Taxes Receivable, Current</link:label>
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    <link:label id="lab_us-gaap_DeferredTaxAssetsNetCurrent_CBEEFCB73E2C34B1F69EA1868A9D4AA3_label_en-US" xlink:label="lab_us-gaap_DeferredTaxAssetsNetCurrent_CBEEFCB73E2C34B1F69EA1868A9D4AA3" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Deferred Tax Assets, Net of Valuation Allowance, Current</link:label>
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    <link:label id="lab_us-gaap_AssetsCurrent_87E7FEA12AD39261B274A1868A9DB557_totalLabel_en-US" xlink:label="lab_us-gaap_AssetsCurrent_87E7FEA12AD39261B274A1868A9DB557" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Total current assets</link:label>
    <link:label id="lab_us-gaap_AssetsCurrent_87E7FEA12AD39261B274A1868A9DB557_label_en-US" xlink:label="lab_us-gaap_AssetsCurrent_87E7FEA12AD39261B274A1868A9DB557" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Assets, Current</link:label>
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    <link:label id="lab_us-gaap_AssetsNoncurrentAbstract_18C9C417AB07B3D69FD8A1868A9D96CF_label_en-US" xlink:label="lab_us-gaap_AssetsNoncurrentAbstract_18C9C417AB07B3D69FD8A1868A9D96CF" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Assets, Noncurrent [Abstract]</link:label>
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    <link:label id="lab_us-gaap_PropertyPlantAndEquipmentGrossAbstract_906F90FDFD344423A41EA1868A9D6210_terseLabel_en-US" xlink:label="lab_us-gaap_PropertyPlantAndEquipmentGrossAbstract_906F90FDFD344423A41EA1868A9D6210" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">PROPERTY AND EQUIPMENT</link:label>
    <link:label id="lab_us-gaap_PropertyPlantAndEquipmentGrossAbstract_906F90FDFD344423A41EA1868A9D6210_label_en-US" xlink:label="lab_us-gaap_PropertyPlantAndEquipmentGrossAbstract_906F90FDFD344423A41EA1868A9D6210" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Property, Plant and Equipment, Gross [Abstract]</link:label>
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    <link:label id="lab_us-gaap_LandAndLandImprovements_36B7D29FAA68A2C3BF37A1868A9DDBFF_terseLabel_en-US" xlink:label="lab_us-gaap_LandAndLandImprovements_36B7D29FAA68A2C3BF37A1868A9DDBFF" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Land and land improvements</link:label>
    <link:label id="lab_us-gaap_LandAndLandImprovements_36B7D29FAA68A2C3BF37A1868A9DDBFF_label_en-US" xlink:label="lab_us-gaap_LandAndLandImprovements_36B7D29FAA68A2C3BF37A1868A9DDBFF" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Land and Land Improvements</link:label>
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    <link:label id="lab_us-gaap_BuildingsAndImprovementsGross_384FAC49831320E5DB8BA1868A9D0DA9_terseLabel_en-US" xlink:label="lab_us-gaap_BuildingsAndImprovementsGross_384FAC49831320E5DB8BA1868A9D0DA9" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Buildings</link:label>
    <link:label id="lab_us-gaap_BuildingsAndImprovementsGross_384FAC49831320E5DB8BA1868A9D0DA9_label_en-US" xlink:label="lab_us-gaap_BuildingsAndImprovementsGross_384FAC49831320E5DB8BA1868A9D0DA9" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Buildings and Improvements, Gross</link:label>
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    <link:label id="lab_us-gaap_LeaseholdImprovementsGross_EA635DF45DB1E208167CA1868A9D0EEA_terseLabel_en-US" xlink:label="lab_us-gaap_LeaseholdImprovementsGross_EA635DF45DB1E208167CA1868A9D0EEA" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Leasehold improvements</link:label>
    <link:label id="lab_us-gaap_LeaseholdImprovementsGross_EA635DF45DB1E208167CA1868A9D0EEA_label_en-US" xlink:label="lab_us-gaap_LeaseholdImprovementsGross_EA635DF45DB1E208167CA1868A9D0EEA" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Leasehold Improvements, Gross</link:label>
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    <link:label id="lab_us-gaap_FurnitureAndFixturesGross_9D3D023F870F643E3A7EA1868A9DAB6A_terseLabel_en-US" xlink:label="lab_us-gaap_FurnitureAndFixturesGross_9D3D023F870F643E3A7EA1868A9DAB6A" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Furniture and fixtures</link:label>
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    <link:label id="lab_us-gaap_MachineryAndEquipmentGross_C17AF0B5EFC19AC3CCACA1868A9DCBA3_terseLabel_en-US" xlink:label="lab_us-gaap_MachineryAndEquipmentGross_C17AF0B5EFC19AC3CCACA1868A9DCBA3" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Shop and service equipment</link:label>
    <link:label id="lab_us-gaap_MachineryAndEquipmentGross_C17AF0B5EFC19AC3CCACA1868A9DCBA3_label_en-US" xlink:label="lab_us-gaap_MachineryAndEquipmentGross_C17AF0B5EFC19AC3CCACA1868A9DCBA3" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Machinery and Equipment, Gross</link:label>
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    <link:label id="lab_htld_RevenueEquipment_46F872F277CEA15F2E25A1868A9D7563_terseLabel_en-US" xlink:label="lab_htld_RevenueEquipment_46F872F277CEA15F2E25A1868A9D7563" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Revenue equipment</link:label>
    <link:label id="lab_htld_RevenueEquipment_46F872F277CEA15F2E25A1868A9D7563_label_en-US" xlink:label="lab_htld_RevenueEquipment_46F872F277CEA15F2E25A1868A9D7563" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">REVENUE EQUIPMENT</link:label>
    <link:label id="lab_htld_RevenueEquipment_46F872F277CEA15F2E25A1868A9D7563_documentation_en-US" xlink:label="lab_htld_RevenueEquipment_46F872F277CEA15F2E25A1868A9D7563" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Carrying amount at the balance sheet date for long lived physical assets used in the normal conduct of business and not intended for resale.  Revenue equipment includes tractors and trailers used for purposes of providing transportation services.</link:label>
    <link:loc xlink:href="htld-20170930.xsd#htld_RevenueEquipment" xlink:label="loc_htld_RevenueEquipment_46F872F277CEA15F2E25A1868A9D7563" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_htld_RevenueEquipment_46F872F277CEA15F2E25A1868A9D7563" xlink:to="lab_htld_RevenueEquipment_46F872F277CEA15F2E25A1868A9D7563" xlink:type="arc" />
    <link:label id="lab_us-gaap_ConstructionInProgressGross_032D634408C77DF2BD30A1868A9DF70C_terseLabel_en-US" xlink:label="lab_us-gaap_ConstructionInProgressGross_032D634408C77DF2BD30A1868A9DF70C" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Construction in progress</link:label>
    <link:label id="lab_us-gaap_ConstructionInProgressGross_032D634408C77DF2BD30A1868A9DF70C_label_en-US" xlink:label="lab_us-gaap_ConstructionInProgressGross_032D634408C77DF2BD30A1868A9DF70C" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Construction in Progress, Gross</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConstructionInProgressGross" xlink:label="loc_us-gaap_ConstructionInProgressGross_032D634408C77DF2BD30A1868A9DF70C" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ConstructionInProgressGross_032D634408C77DF2BD30A1868A9DF70C" xlink:to="lab_us-gaap_ConstructionInProgressGross_032D634408C77DF2BD30A1868A9DF70C" xlink:type="arc" />
    <link:label id="lab_us-gaap_PropertyPlantAndEquipmentGross_A5A657CA847E3F751A99A1868A9D6D5F_totalLabel_en-US" xlink:label="lab_us-gaap_PropertyPlantAndEquipmentGross_A5A657CA847E3F751A99A1868A9D6D5F" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Property, Plant and Equipment, Gross</link:label>
    <link:label id="lab_us-gaap_PropertyPlantAndEquipmentGross_A5A657CA847E3F751A99A1868A9D6D5F_label_en-US" xlink:label="lab_us-gaap_PropertyPlantAndEquipmentGross_A5A657CA847E3F751A99A1868A9D6D5F" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Property, Plant and Equipment, Gross</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PropertyPlantAndEquipmentGross" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentGross_A5A657CA847E3F751A99A1868A9D6D5F" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentGross_A5A657CA847E3F751A99A1868A9D6D5F" xlink:to="lab_us-gaap_PropertyPlantAndEquipmentGross_A5A657CA847E3F751A99A1868A9D6D5F" xlink:type="arc" />
    <link:label id="lab_us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment_547BBD9881D2F911BA6CA1868A9D3F53_terseLabel_en-US" xlink:label="lab_us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment_547BBD9881D2F911BA6CA1868A9D3F53" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Less accumulated depreciation</link:label>
    <link:label id="lab_us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment_547BBD9881D2F911BA6CA1868A9D3F53_label_en-US" xlink:label="lab_us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment_547BBD9881D2F911BA6CA1868A9D3F53" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment" xlink:label="loc_us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment_547BBD9881D2F911BA6CA1868A9D3F53" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment_547BBD9881D2F911BA6CA1868A9D3F53" xlink:to="lab_us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment_547BBD9881D2F911BA6CA1868A9D3F53" xlink:type="arc" />
    <link:label id="lab_us-gaap_PropertyPlantAndEquipmentNet_42644973346FB555C3F5A1868A9D199D_totalLabel_en-US" xlink:label="lab_us-gaap_PropertyPlantAndEquipmentNet_42644973346FB555C3F5A1868A9D199D" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Property and equipment, net</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PropertyPlantAndEquipmentNet" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentNet_42644973346FB555C3F5A1868A9D199D" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentNet_42644973346FB555C3F5A1868A9D199D" xlink:to="lab_us-gaap_PropertyPlantAndEquipmentNet_42644973346FB555C3F5A1868A9D199D" xlink:type="arc" />
    <link:label id="lab_us-gaap_IntangibleAssetsNetExcludingGoodwill_449CA25EA0B350C93790A1868A9D12BE_terseLabel_en-US" xlink:label="lab_us-gaap_IntangibleAssetsNetExcludingGoodwill_449CA25EA0B350C93790A1868A9D12BE" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">OTHER INTANGIBLES, NET</link:label>
    <link:label id="lab_us-gaap_IntangibleAssetsNetExcludingGoodwill_449CA25EA0B350C93790A1868A9D12BE_label_en-US" xlink:label="lab_us-gaap_IntangibleAssetsNetExcludingGoodwill_449CA25EA0B350C93790A1868A9D12BE" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Intangible Assets, Net (Excluding Goodwill)</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IntangibleAssetsNetExcludingGoodwill" xlink:label="loc_us-gaap_IntangibleAssetsNetExcludingGoodwill_449CA25EA0B350C93790A1868A9D12BE" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_IntangibleAssetsNetExcludingGoodwill_449CA25EA0B350C93790A1868A9D12BE" xlink:to="lab_us-gaap_IntangibleAssetsNetExcludingGoodwill_449CA25EA0B350C93790A1868A9D12BE" xlink:type="arc" />
    <link:label id="lab_us-gaap_DeferredIncomeTaxAssetsNet_59748818538F7A390066A1868A9D5BDA_terseLabel_en-US" xlink:label="lab_us-gaap_DeferredIncomeTaxAssetsNet_59748818538F7A390066A1868A9D5BDA" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Deferred Income Taxes, Net</link:label>
    <link:label id="lab_us-gaap_DeferredIncomeTaxAssetsNet_59748818538F7A390066A1868A9D5BDA_label_en-US" xlink:label="lab_us-gaap_DeferredIncomeTaxAssetsNet_59748818538F7A390066A1868A9D5BDA" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Deferred Income Tax Assets, Net</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DeferredIncomeTaxAssetsNet" xlink:label="loc_us-gaap_DeferredIncomeTaxAssetsNet_59748818538F7A390066A1868A9D5BDA" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DeferredIncomeTaxAssetsNet_59748818538F7A390066A1868A9D5BDA" xlink:to="lab_us-gaap_DeferredIncomeTaxAssetsNet_59748818538F7A390066A1868A9D5BDA" xlink:type="arc" />
    <link:label id="lab_us-gaap_OtherAssetsNoncurrent_A051617940A930480F94A1868A9ECB98_verboseLabel_en-US" xlink:label="lab_us-gaap_OtherAssetsNoncurrent_A051617940A930480F94A1868A9ECB98" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">OTHER ASSETS</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OtherAssetsNoncurrent" xlink:label="loc_us-gaap_OtherAssetsNoncurrent_A051617940A930480F94A1868A9ECB98" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_OtherAssetsNoncurrent_A051617940A930480F94A1868A9ECB98" xlink:to="lab_us-gaap_OtherAssetsNoncurrent_A051617940A930480F94A1868A9ECB98" xlink:type="arc" />
    <link:label id="lab_us-gaap_Assets_12AF1C20C960D66E55A1A1868A9E0B87_totalLabel_en-US" xlink:label="lab_us-gaap_Assets_12AF1C20C960D66E55A1A1868A9E0B87" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Assets</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_Assets" xlink:label="loc_us-gaap_Assets_12AF1C20C960D66E55A1A1868A9E0B87" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_Assets_12AF1C20C960D66E55A1A1868A9E0B87" xlink:to="lab_us-gaap_Assets_12AF1C20C960D66E55A1A1868A9E0B87" xlink:type="arc" />
    <link:label id="lab_us-gaap_LiabilitiesAndStockholdersEquityAbstract_D570E150D38B2D2B8724A1868A9E1E72_terseLabel_en-US" xlink:label="lab_us-gaap_LiabilitiesAndStockholdersEquityAbstract_D570E150D38B2D2B8724A1868A9E1E72" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">LIABILITIES AND STOCKHOLDERS' EQUITY</link:label>
    <link:label id="lab_us-gaap_LiabilitiesAndStockholdersEquityAbstract_D570E150D38B2D2B8724A1868A9E1E72_label_en-US" xlink:label="lab_us-gaap_LiabilitiesAndStockholdersEquityAbstract_D570E150D38B2D2B8724A1868A9E1E72" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Liabilities and Equity [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LiabilitiesAndStockholdersEquityAbstract" xlink:label="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_D570E150D38B2D2B8724A1868A9E1E72" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_D570E150D38B2D2B8724A1868A9E1E72" xlink:to="lab_us-gaap_LiabilitiesAndStockholdersEquityAbstract_D570E150D38B2D2B8724A1868A9E1E72" xlink:type="arc" />
    <link:label id="lab_us-gaap_LiabilitiesCurrentAbstract_5DA6C91399AE36C7CBF1A1868A9E0317_terseLabel_en-US" xlink:label="lab_us-gaap_LiabilitiesCurrentAbstract_5DA6C91399AE36C7CBF1A1868A9E0317" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">CURRENT LIABILITIES</link:label>
    <link:label id="lab_us-gaap_LiabilitiesCurrentAbstract_5DA6C91399AE36C7CBF1A1868A9E0317_label_en-US" xlink:label="lab_us-gaap_LiabilitiesCurrentAbstract_5DA6C91399AE36C7CBF1A1868A9E0317" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Liabilities, Current [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LiabilitiesCurrentAbstract" xlink:label="loc_us-gaap_LiabilitiesCurrentAbstract_5DA6C91399AE36C7CBF1A1868A9E0317" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LiabilitiesCurrentAbstract_5DA6C91399AE36C7CBF1A1868A9E0317" xlink:to="lab_us-gaap_LiabilitiesCurrentAbstract_5DA6C91399AE36C7CBF1A1868A9E0317" xlink:type="arc" />
    <link:label id="lab_us-gaap_AccountsPayableAndAccruedLiabilitiesCurrent_1BB120279961F50214F9A1868A9E1841_terseLabel_en-US" xlink:label="lab_us-gaap_AccountsPayableAndAccruedLiabilitiesCurrent_1BB120279961F50214F9A1868A9E1841" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Accounts payable and accrued liabilities</link:label>
    <link:label id="lab_us-gaap_AccountsPayableAndAccruedLiabilitiesCurrent_1BB120279961F50214F9A1868A9E1841_label_en-US" xlink:label="lab_us-gaap_AccountsPayableAndAccruedLiabilitiesCurrent_1BB120279961F50214F9A1868A9E1841" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Accounts Payable and Accrued Liabilities, Current</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AccountsPayableAndAccruedLiabilitiesCurrent" xlink:label="loc_us-gaap_AccountsPayableAndAccruedLiabilitiesCurrent_1BB120279961F50214F9A1868A9E1841" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AccountsPayableAndAccruedLiabilitiesCurrent_1BB120279961F50214F9A1868A9E1841" xlink:to="lab_us-gaap_AccountsPayableAndAccruedLiabilitiesCurrent_1BB120279961F50214F9A1868A9E1841" xlink:type="arc" />
    <link:label id="lab_us-gaap_EmployeeRelatedLiabilitiesCurrent_509D2C5E8B2D49235E82A1868A9E0D3E_terseLabel_en-US" xlink:label="lab_us-gaap_EmployeeRelatedLiabilitiesCurrent_509D2C5E8B2D49235E82A1868A9E0D3E" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Compensation and benefits</link:label>
    <link:label id="lab_us-gaap_EmployeeRelatedLiabilitiesCurrent_509D2C5E8B2D49235E82A1868A9E0D3E_label_en-US" xlink:label="lab_us-gaap_EmployeeRelatedLiabilitiesCurrent_509D2C5E8B2D49235E82A1868A9E0D3E" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Employee-related Liabilities, Current</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_EmployeeRelatedLiabilitiesCurrent" xlink:label="loc_us-gaap_EmployeeRelatedLiabilitiesCurrent_509D2C5E8B2D49235E82A1868A9E0D3E" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_EmployeeRelatedLiabilitiesCurrent_509D2C5E8B2D49235E82A1868A9E0D3E" xlink:to="lab_us-gaap_EmployeeRelatedLiabilitiesCurrent_509D2C5E8B2D49235E82A1868A9E0D3E" xlink:type="arc" />
    <link:label id="lab_us-gaap_SelfInsuranceReserveCurrent_447927BA836CEE6853D5A1868A9E01B7_terseLabel_en-US" xlink:label="lab_us-gaap_SelfInsuranceReserveCurrent_447927BA836CEE6853D5A1868A9E01B7" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Insurance accruals</link:label>
    <link:label id="lab_us-gaap_SelfInsuranceReserveCurrent_447927BA836CEE6853D5A1868A9E01B7_label_en-US" xlink:label="lab_us-gaap_SelfInsuranceReserveCurrent_447927BA836CEE6853D5A1868A9E01B7" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Self Insurance Reserve, Current</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SelfInsuranceReserveCurrent" xlink:label="loc_us-gaap_SelfInsuranceReserveCurrent_447927BA836CEE6853D5A1868A9E01B7" xlink:type="locator" />
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    <link:label id="lab_us-gaap_AccruedIncomeTaxesCurrent_7468032BA8133F94CEECA1868A9EAAEB_terseLabel_en-US" xlink:label="lab_us-gaap_AccruedIncomeTaxesCurrent_7468032BA8133F94CEECA1868A9EAAEB" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Income Taxes payable</link:label>
    <link:label id="lab_us-gaap_AccruedIncomeTaxesCurrent_7468032BA8133F94CEECA1868A9EAAEB_label_en-US" xlink:label="lab_us-gaap_AccruedIncomeTaxesCurrent_7468032BA8133F94CEECA1868A9EAAEB" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Accrued Income Taxes, Current</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AccruedIncomeTaxesCurrent" xlink:label="loc_us-gaap_AccruedIncomeTaxesCurrent_7468032BA8133F94CEECA1868A9EAAEB" xlink:type="locator" />
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    <link:label id="lab_us-gaap_OtherAccruedLiabilitiesCurrent_B0447DDA56E5FBBEC4A1A1868A9EB385_terseLabel_en-US" xlink:label="lab_us-gaap_OtherAccruedLiabilitiesCurrent_B0447DDA56E5FBBEC4A1A1868A9EB385" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Other accruals</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_OtherAccruedLiabilitiesCurrent" xlink:label="loc_us-gaap_OtherAccruedLiabilitiesCurrent_B0447DDA56E5FBBEC4A1A1868A9EB385" xlink:type="locator" />
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    <link:label id="lab_us-gaap_LiabilitiesCurrent_83371EE4729F1D951435A1868A9E906B_totalLabel_en-US" xlink:label="lab_us-gaap_LiabilitiesCurrent_83371EE4729F1D951435A1868A9E906B" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Total current liabilities</link:label>
    <link:label id="lab_us-gaap_LiabilitiesCurrent_83371EE4729F1D951435A1868A9E906B_label_en-US" xlink:label="lab_us-gaap_LiabilitiesCurrent_83371EE4729F1D951435A1868A9E906B" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Liabilities, Current</link:label>
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    <link:label id="lab_us-gaap_LiabilitiesNoncurrentAbstract_DB7B89EBD81226B73486A1868A9EE138_terseLabel_en-US" xlink:label="lab_us-gaap_LiabilitiesNoncurrentAbstract_DB7B89EBD81226B73486A1868A9EE138" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">LONG-TERM LIABILITIES</link:label>
    <link:label id="lab_us-gaap_LiabilitiesNoncurrentAbstract_DB7B89EBD81226B73486A1868A9EE138_label_en-US" xlink:label="lab_us-gaap_LiabilitiesNoncurrentAbstract_DB7B89EBD81226B73486A1868A9EE138" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Liabilities, Noncurrent [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LiabilitiesNoncurrentAbstract" xlink:label="loc_us-gaap_LiabilitiesNoncurrentAbstract_DB7B89EBD81226B73486A1868A9EE138" xlink:type="locator" />
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    <link:label id="lab_us-gaap_AccruedIncomeTaxesNoncurrent_949FCF8ED387936A170DA1868A9E93F9_terseLabel_en-US" xlink:label="lab_us-gaap_AccruedIncomeTaxesNoncurrent_949FCF8ED387936A170DA1868A9E93F9" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Income taxes payable</link:label>
    <link:label id="lab_us-gaap_AccruedIncomeTaxesNoncurrent_949FCF8ED387936A170DA1868A9E93F9_label_en-US" xlink:label="lab_us-gaap_AccruedIncomeTaxesNoncurrent_949FCF8ED387936A170DA1868A9E93F9" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Accrued Income Taxes, Noncurrent</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AccruedIncomeTaxesNoncurrent" xlink:label="loc_us-gaap_AccruedIncomeTaxesNoncurrent_949FCF8ED387936A170DA1868A9E93F9" xlink:type="locator" />
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    <link:label id="lab_us-gaap_DeferredTaxLiabilitiesNoncurrent_28A485FEA24BC4265337A1868A9E41CC_terseLabel_en-US" xlink:label="lab_us-gaap_DeferredTaxLiabilitiesNoncurrent_28A485FEA24BC4265337A1868A9E41CC" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Deferred income taxes, net</link:label>
    <link:label id="lab_us-gaap_DeferredTaxLiabilitiesNoncurrent_28A485FEA24BC4265337A1868A9E41CC_label_en-US" xlink:label="lab_us-gaap_DeferredTaxLiabilitiesNoncurrent_28A485FEA24BC4265337A1868A9E41CC" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Deferred Tax Liabilities, Net, Noncurrent</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DeferredTaxLiabilitiesNoncurrent" xlink:label="loc_us-gaap_DeferredTaxLiabilitiesNoncurrent_28A485FEA24BC4265337A1868A9E41CC" xlink:type="locator" />
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    <link:label id="lab_us-gaap_SelfInsuranceReserveNoncurrent_CC737177233D2461ACDEA1868A9E9D4A_terseLabel_en-US" xlink:label="lab_us-gaap_SelfInsuranceReserveNoncurrent_CC737177233D2461ACDEA1868A9E9D4A" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Insurance accruals less current portion</link:label>
    <link:label id="lab_us-gaap_SelfInsuranceReserveNoncurrent_CC737177233D2461ACDEA1868A9E9D4A_label_en-US" xlink:label="lab_us-gaap_SelfInsuranceReserveNoncurrent_CC737177233D2461ACDEA1868A9E9D4A" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Self Insurance Reserve, Noncurrent</link:label>
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    <link:label id="lab_us-gaap_OtherLiabilitiesNoncurrent_7D5D719DFA43104ADD21A1868A9E5FBB_terseLabel_en-US" xlink:label="lab_us-gaap_OtherLiabilitiesNoncurrent_7D5D719DFA43104ADD21A1868A9E5FBB" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Other long-term liabilities</link:label>
    <link:label id="lab_us-gaap_OtherLiabilitiesNoncurrent_7D5D719DFA43104ADD21A1868A9E5FBB_label_en-US" xlink:label="lab_us-gaap_OtherLiabilitiesNoncurrent_7D5D719DFA43104ADD21A1868A9E5FBB" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Other Liabilities, Noncurrent</link:label>
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    <link:label id="lab_us-gaap_LiabilitiesNoncurrent_1B51409412D2F2129B60A1868A9E3A6B_totalLabel_en-US" xlink:label="lab_us-gaap_LiabilitiesNoncurrent_1B51409412D2F2129B60A1868A9E3A6B" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Total long-term liabilities</link:label>
    <link:label id="lab_us-gaap_LiabilitiesNoncurrent_1B51409412D2F2129B60A1868A9E3A6B_label_en-US" xlink:label="lab_us-gaap_LiabilitiesNoncurrent_1B51409412D2F2129B60A1868A9E3A6B" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Liabilities, Noncurrent</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LiabilitiesNoncurrent" xlink:label="loc_us-gaap_LiabilitiesNoncurrent_1B51409412D2F2129B60A1868A9E3A6B" xlink:type="locator" />
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    <link:label id="lab_us-gaap_CommitmentsAndContingencies_18F54E81273CBA661718A1868A9E6438_terseLabel_en-US" xlink:label="lab_us-gaap_CommitmentsAndContingencies_18F54E81273CBA661718A1868A9E6438" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">COMMITMENTS AND CONTINGENCIES (Note 15)</link:label>
    <link:label id="lab_us-gaap_CommitmentsAndContingencies_18F54E81273CBA661718A1868A9E6438_label_en-US" xlink:label="lab_us-gaap_CommitmentsAndContingencies_18F54E81273CBA661718A1868A9E6438" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Commitments and Contingencies</link:label>
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    <link:label id="lab_us-gaap_StockholdersEquityAbstract_D350C384E48D83D61033A1868A9EC229_terseLabel_en-US" xlink:label="lab_us-gaap_StockholdersEquityAbstract_D350C384E48D83D61033A1868A9EC229" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">STOCKHOLDERS' EQUITY</link:label>
    <link:label id="lab_us-gaap_StockholdersEquityAbstract_D350C384E48D83D61033A1868A9EC229_label_en-US" xlink:label="lab_us-gaap_StockholdersEquityAbstract_D350C384E48D83D61033A1868A9EC229" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Stockholders' Equity Attributable to Parent [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_StockholdersEquityAbstract" xlink:label="loc_us-gaap_StockholdersEquityAbstract_D350C384E48D83D61033A1868A9EC229" xlink:type="locator" />
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    <link:label id="lab_us-gaap_PreferredStockValue_190592C5A3618B2469AAA1868A9F3937_terseLabel_en-US" xlink:label="lab_us-gaap_PreferredStockValue_190592C5A3618B2469AAA1868A9F3937" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Preferred stock, par value $.01; authorized 5,000 shares; none issued</link:label>
    <link:label id="lab_us-gaap_PreferredStockValue_190592C5A3618B2469AAA1868A9F3937_label_en-US" xlink:label="lab_us-gaap_PreferredStockValue_190592C5A3618B2469AAA1868A9F3937" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Preferred Stock, Value, Issued</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PreferredStockValue" xlink:label="loc_us-gaap_PreferredStockValue_190592C5A3618B2469AAA1868A9F3937" xlink:type="locator" />
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    <link:label id="lab_us-gaap_CommonStockValue_3599866A00671293ABF3A1868A9FF9C7_terseLabel_en-US" xlink:label="lab_us-gaap_CommonStockValue_3599866A00671293ABF3A1868A9FF9C7" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Capital stock, common, $.01 par value; authorized 395,000 shares; issued 90,689 in 2017 and 2016; outstanding 83,303 in 2017 and 83,287 in 2016, respectively</link:label>
    <link:label id="lab_us-gaap_CommonStockValue_3599866A00671293ABF3A1868A9FF9C7_label_en-US" xlink:label="lab_us-gaap_CommonStockValue_3599866A00671293ABF3A1868A9FF9C7" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Common Stock, Value, Issued</link:label>
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    <link:label id="lab_us-gaap_AdditionalPaidInCapitalCommonStock_E768286474521FC86641A1868A9FB9A2_terseLabel_en-US" xlink:label="lab_us-gaap_AdditionalPaidInCapitalCommonStock_E768286474521FC86641A1868A9FB9A2" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Additional paid-in capital</link:label>
    <link:label id="lab_us-gaap_AdditionalPaidInCapitalCommonStock_E768286474521FC86641A1868A9FB9A2_label_en-US" xlink:label="lab_us-gaap_AdditionalPaidInCapitalCommonStock_E768286474521FC86641A1868A9FB9A2" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Additional Paid in Capital, Common Stock</link:label>
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    <link:label id="lab_us-gaap_RetainedEarningsAccumulatedDeficit_282A34B42CC195B08AE3A1868A9F4862_label_en-US" xlink:label="lab_us-gaap_RetainedEarningsAccumulatedDeficit_282A34B42CC195B08AE3A1868A9F4862" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Retained Earnings (Accumulated Deficit)</link:label>
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    <link:label id="lab_us-gaap_TreasuryStockValue_55EF9BDA8DECD2E14F29A1868A9F660C_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_TreasuryStockValue_55EF9BDA8DECD2E14F29A1868A9F660C" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Treasury stock, at cost; 7,386 shares in 2017 and 7,402 in 2016, respectively</link:label>
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    <link:label id="lab_us-gaap_StockholdersEquity_B4F7CA3D0FB963698719A1868A9F1026_totalLabel_en-US" xlink:label="lab_us-gaap_StockholdersEquity_B4F7CA3D0FB963698719A1868A9F1026" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Stockholders' Equity Attributable to Parent</link:label>
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    <link:label id="lab_us-gaap_PropertySubjectToOrAvailableForOperatingLeaseAxis_F5A38A54A725C04F4EFDA18689B0C646_label_en-US" xlink:label="lab_us-gaap_PropertySubjectToOrAvailableForOperatingLeaseAxis_F5A38A54A725C04F4EFDA18689B0C646" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Property Subject to or Available for Operating Lease [Axis]</link:label>
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    <link:label id="lab_us-gaap_PropertySubjectToOrAvailableForOperatingLeaseDomain_021B98DD5C9242C52D56A18689B0006B_terseLabel_en-US" xlink:label="lab_us-gaap_PropertySubjectToOrAvailableForOperatingLeaseDomain_021B98DD5C9242C52D56A18689B0006B" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Property Subject to or Available for Operating Lease [Domain]</link:label>
    <link:label id="lab_us-gaap_PropertySubjectToOrAvailableForOperatingLeaseDomain_021B98DD5C9242C52D56A18689B0006B_label_en-US" xlink:label="lab_us-gaap_PropertySubjectToOrAvailableForOperatingLeaseDomain_021B98DD5C9242C52D56A18689B0006B" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Property Subject to or Available for Operating Lease [Domain]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PropertySubjectToOrAvailableForOperatingLeaseDomain" xlink:label="loc_us-gaap_PropertySubjectToOrAvailableForOperatingLeaseDomain_021B98DD5C9242C52D56A18689B0006B" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PropertySubjectToOrAvailableForOperatingLeaseDomain_021B98DD5C9242C52D56A18689B0006B" xlink:to="lab_us-gaap_PropertySubjectToOrAvailableForOperatingLeaseDomain_021B98DD5C9242C52D56A18689B0006B" xlink:type="arc" />
    <link:label id="lab_htld_TerminalFacilitiesMember_D4EB05FF8CA89253F305A18689B01BA4_terseLabel_en-US" xlink:label="lab_htld_TerminalFacilitiesMember_D4EB05FF8CA89253F305A18689B01BA4" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Terminal Facilities</link:label>
    <link:label id="lab_htld_TerminalFacilitiesMember_D4EB05FF8CA89253F305A18689B01BA4_label_en-US" xlink:label="lab_htld_TerminalFacilitiesMember_D4EB05FF8CA89253F305A18689B01BA4" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Terminal Facilities [Member]</link:label>
    <link:label id="lab_htld_TerminalFacilitiesMember_D4EB05FF8CA89253F305A18689B01BA4_documentation_en-US" xlink:label="lab_htld_TerminalFacilitiesMember_D4EB05FF8CA89253F305A18689B01BA4" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Terminal Facilities [Member]</link:label>
    <link:loc xlink:href="htld-20170930.xsd#htld_TerminalFacilitiesMember" xlink:label="loc_htld_TerminalFacilitiesMember_D4EB05FF8CA89253F305A18689B01BA4" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_htld_TerminalFacilitiesMember_D4EB05FF8CA89253F305A18689B01BA4" xlink:to="lab_htld_TerminalFacilitiesMember_D4EB05FF8CA89253F305A18689B01BA4" xlink:type="arc" />
    <link:label id="lab_us-gaap_LeaseArrangementTypeAxis_28839B604A6B4B03E88CA18689B07C28_terseLabel_en-US" xlink:label="lab_us-gaap_LeaseArrangementTypeAxis_28839B604A6B4B03E88CA18689B07C28" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Parties to Contractual Arrangement [Axis]</link:label>
    <link:label id="lab_us-gaap_LeaseArrangementTypeAxis_28839B604A6B4B03E88CA18689B07C28_label_en-US" xlink:label="lab_us-gaap_LeaseArrangementTypeAxis_28839B604A6B4B03E88CA18689B07C28" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Lease Arrangement, Type [Axis]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LeaseArrangementTypeAxis" xlink:label="loc_us-gaap_LeaseArrangementTypeAxis_28839B604A6B4B03E88CA18689B07C28" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LeaseArrangementTypeAxis_28839B604A6B4B03E88CA18689B07C28" xlink:to="lab_us-gaap_LeaseArrangementTypeAxis_28839B604A6B4B03E88CA18689B07C28" xlink:type="arc" />
    <link:label id="lab_us-gaap_LeaseArrangementTypeDomain_0D6692681E4292557EC7A18689B0BE4D_terseLabel_en-US" xlink:label="lab_us-gaap_LeaseArrangementTypeDomain_0D6692681E4292557EC7A18689B0BE4D" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Parties to Contractual Arrangement [Domain]</link:label>
    <link:label id="lab_us-gaap_LeaseArrangementTypeDomain_0D6692681E4292557EC7A18689B0BE4D_label_en-US" xlink:label="lab_us-gaap_LeaseArrangementTypeDomain_0D6692681E4292557EC7A18689B0BE4D" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Lease Arrangement, Type [Domain]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LeaseArrangementTypeDomain" xlink:label="loc_us-gaap_LeaseArrangementTypeDomain_0D6692681E4292557EC7A18689B0BE4D" xlink:type="locator" />
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    <link:label id="lab_htld_RelatedPartyMember_8E1826E7B261DBA59400A18689B09170_terseLabel_en-US" xlink:label="lab_htld_RelatedPartyMember_8E1826E7B261DBA59400A18689B09170" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Related Party</link:label>
    <link:label id="lab_htld_RelatedPartyMember_8E1826E7B261DBA59400A18689B09170_label_en-US" xlink:label="lab_htld_RelatedPartyMember_8E1826E7B261DBA59400A18689B09170" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Related Party [Member]</link:label>
    <link:label id="lab_htld_RelatedPartyMember_8E1826E7B261DBA59400A18689B09170_documentation_en-US" xlink:label="lab_htld_RelatedPartyMember_8E1826E7B261DBA59400A18689B09170" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Related Party [Member]</link:label>
    <link:loc xlink:href="htld-20170930.xsd#htld_RelatedPartyMember" xlink:label="loc_htld_RelatedPartyMember_8E1826E7B261DBA59400A18689B09170" xlink:type="locator" />
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    <link:label id="lab_us-gaap_OperatingLeasedAssetsLineItems_049427959FF46F6ECB12A18689B0D840_terseLabel_en-US" xlink:label="lab_us-gaap_OperatingLeasedAssetsLineItems_049427959FF46F6ECB12A18689B0D840" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Operating Leased Assets [Line Items]</link:label>
    <link:label id="lab_us-gaap_OperatingLeasedAssetsLineItems_049427959FF46F6ECB12A18689B0D840_label_en-US" xlink:label="lab_us-gaap_OperatingLeasedAssetsLineItems_049427959FF46F6ECB12A18689B0D840" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Operating Leased Assets [Line Items]</link:label>
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    <link:label id="lab_us-gaap_LeaseAndRentalExpense_91AF511C961FB57041BFA18689B09BB1_terseLabel_en-US" xlink:label="lab_us-gaap_LeaseAndRentalExpense_91AF511C961FB57041BFA18689B09BB1" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Operating Leases, Rent Expense</link:label>
    <link:label id="lab_us-gaap_LeaseAndRentalExpense_91AF511C961FB57041BFA18689B09BB1_label_en-US" xlink:label="lab_us-gaap_LeaseAndRentalExpense_91AF511C961FB57041BFA18689B09BB1" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Operating Leases, Rent Expense</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LeaseAndRentalExpense" xlink:label="loc_us-gaap_LeaseAndRentalExpense_91AF511C961FB57041BFA18689B09BB1" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LeaseAndRentalExpense_91AF511C961FB57041BFA18689B09BB1" xlink:to="lab_us-gaap_LeaseAndRentalExpense_91AF511C961FB57041BFA18689B09BB1" xlink:type="arc" />
    <link:label id="lab_htld_ShareRepurchasesAbstract_5F21F43454F978696274A1868A04D3AB_label_en-US" xlink:label="lab_htld_ShareRepurchasesAbstract_5F21F43454F978696274A1868A04D3AB" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Share Repurchases [Abstract]</link:label>
    <link:label id="lab_htld_ShareRepurchasesAbstract_5F21F43454F978696274A1868A04D3AB_documentation_en-US" xlink:label="lab_htld_ShareRepurchasesAbstract_5F21F43454F978696274A1868A04D3AB" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Note 10.  Share Repurchases [Abstract]</link:label>
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    <link:label id="lab_us-gaap_StockholdersEquityNoteDisclosureTextBlock_468E5697B98AFEA56D58A1868A043407_terseLabel_en-US" xlink:label="lab_us-gaap_StockholdersEquityNoteDisclosureTextBlock_468E5697B98AFEA56D58A1868A043407" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Stockholders' Equity</link:label>
    <link:label id="lab_us-gaap_StockholdersEquityNoteDisclosureTextBlock_468E5697B98AFEA56D58A1868A043407_label_en-US" xlink:label="lab_us-gaap_StockholdersEquityNoteDisclosureTextBlock_468E5697B98AFEA56D58A1868A043407" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Stockholders' Equity Note Disclosure [Text Block]</link:label>
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    <link:label id="lab_us-gaap_PropertyPlantAndEquipmentDisclosureTextBlock_5E140AD863970847BD3CA1868A2B86B5_terseLabel_en-US" xlink:label="lab_us-gaap_PropertyPlantAndEquipmentDisclosureTextBlock_5E140AD863970847BD3CA1868A2B86B5" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Property, Equipment, and Depreciation</link:label>
    <link:label id="lab_us-gaap_PropertyPlantAndEquipmentDisclosureTextBlock_5E140AD863970847BD3CA1868A2B86B5_label_en-US" xlink:label="lab_us-gaap_PropertyPlantAndEquipmentDisclosureTextBlock_5E140AD863970847BD3CA1868A2B86B5" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Property, Plant and Equipment Disclosure [Text Block]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PropertyPlantAndEquipmentDisclosureTextBlock" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentDisclosureTextBlock_5E140AD863970847BD3CA1868A2B86B5" xlink:type="locator" />
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    <link:label id="lab_htld_InterstateDistributorCo.AcquisitionAbstract_56AD7B03CF775C601C7DA1868A256350_label_en-US" xlink:label="lab_htld_InterstateDistributorCo.AcquisitionAbstract_56AD7B03CF775C601C7DA1868A256350" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Interstate Distributor Co. Acquisition [Abstract]</link:label>
    <link:label id="lab_htld_InterstateDistributorCo.AcquisitionAbstract_56AD7B03CF775C601C7DA1868A256350_documentation_en-US" xlink:label="lab_htld_InterstateDistributorCo.AcquisitionAbstract_56AD7B03CF775C601C7DA1868A256350" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Interstate Distributor Co. Acquisition [Abstract]</link:label>
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    <link:label id="lab_us-gaap_BusinessCombinationDisclosureTextBlock_E54F06FA2BD274AAAD02A1868A2548B7_terseLabel_en-US" xlink:label="lab_us-gaap_BusinessCombinationDisclosureTextBlock_E54F06FA2BD274AAAD02A1868A2548B7" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Business Combination Disclosure [Text Block]</link:label>
    <link:label id="lab_us-gaap_BusinessCombinationDisclosureTextBlock_E54F06FA2BD274AAAD02A1868A2548B7_label_en-US" xlink:label="lab_us-gaap_BusinessCombinationDisclosureTextBlock_E54F06FA2BD274AAAD02A1868A2548B7" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Business Combination Disclosure [Text Block]</link:label>
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    <link:label id="lab_us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets_9A3FC2489764B6EE45D5A295EE19BCFA_negatedLabel_en-US" xlink:label="lab_us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets_9A3FC2489764B6EE45D5A295EE19BCFA" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xml:lang="en-US">Prepaid expenses and other current assets</link:label>
    <link:label id="lab_us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets_9A3FC2489764B6EE45D5A295EE19BCFA_label_en-US" xlink:label="lab_us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets_9A3FC2489764B6EE45D5A295EE19BCFA" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Increase (Decrease) in Prepaid Expense and Other Assets</link:label>
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    <link:label id="lab_us-gaap_IncreaseDecreaseInAccountsPayableAndAccruedLiabilities_F04A7DD60EB5AA49EA61A295EE192E3A_terseLabel_en-US" xlink:label="lab_us-gaap_IncreaseDecreaseInAccountsPayableAndAccruedLiabilities_F04A7DD60EB5AA49EA61A295EE192E3A" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Accounts payable, accrued liabilities, and accrued expenses</link:label>
    <link:label id="lab_us-gaap_IncreaseDecreaseInAccountsPayableAndAccruedLiabilities_F04A7DD60EB5AA49EA61A295EE192E3A_label_en-US" xlink:label="lab_us-gaap_IncreaseDecreaseInAccountsPayableAndAccruedLiabilities_F04A7DD60EB5AA49EA61A295EE192E3A" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Increase (Decrease) in Accounts Payable and Accrued Liabilities</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IncreaseDecreaseInAccountsPayableAndAccruedLiabilities" xlink:label="loc_us-gaap_IncreaseDecreaseInAccountsPayableAndAccruedLiabilities_F04A7DD60EB5AA49EA61A295EE192E3A" xlink:type="locator" />
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    <link:label id="lab_us-gaap_IncreaseDecreaseInAccruedIncomeTaxesPayable_CAD5B265CC12CFAA2FB0A295EE193CEB_terseLabel_en-US" xlink:label="lab_us-gaap_IncreaseDecreaseInAccruedIncomeTaxesPayable_CAD5B265CC12CFAA2FB0A295EE193CEB" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Accrued income taxes</link:label>
    <link:label id="lab_us-gaap_IncreaseDecreaseInAccruedIncomeTaxesPayable_CAD5B265CC12CFAA2FB0A295EE193CEB_label_en-US" xlink:label="lab_us-gaap_IncreaseDecreaseInAccruedIncomeTaxesPayable_CAD5B265CC12CFAA2FB0A295EE193CEB" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Increase (Decrease) in Income Taxes Payable</link:label>
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    <link:label id="lab_us-gaap_NetCashProvidedByUsedInOperatingActivities_214F1C081659C702BEA3A295EE19443D_totalLabel_en-US" xlink:label="lab_us-gaap_NetCashProvidedByUsedInOperatingActivities_214F1C081659C702BEA3A295EE19443D" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Net cash provided by operating activities</link:label>
    <link:label id="lab_us-gaap_NetCashProvidedByUsedInOperatingActivities_214F1C081659C702BEA3A295EE19443D_label_en-US" xlink:label="lab_us-gaap_NetCashProvidedByUsedInOperatingActivities_214F1C081659C702BEA3A295EE19443D" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Net Cash Provided by (Used in) Operating Activities</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivities" xlink:label="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_214F1C081659C702BEA3A295EE19443D" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_214F1C081659C702BEA3A295EE19443D" xlink:to="lab_us-gaap_NetCashProvidedByUsedInOperatingActivities_214F1C081659C702BEA3A295EE19443D" xlink:type="arc" />
    <link:label id="lab_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_25AE855CC2DFE72C7C87A295EE1915CB_terseLabel_en-US" xlink:label="lab_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_25AE855CC2DFE72C7C87A295EE1915CB" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">INVESTING ACTIVITIES</link:label>
    <link:label id="lab_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_25AE855CC2DFE72C7C87A295EE1915CB_label_en-US" xlink:label="lab_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_25AE855CC2DFE72C7C87A295EE1915CB" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Net Cash Provided by (Used in) Investing Activities [Abstract]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract" xlink:label="loc_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_25AE855CC2DFE72C7C87A295EE1915CB" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_25AE855CC2DFE72C7C87A295EE1915CB" xlink:to="lab_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_25AE855CC2DFE72C7C87A295EE1915CB" xlink:type="arc" />
    <link:label id="lab_us-gaap_ProceedsFromSaleOfPropertyPlantAndEquipment_375A12D9A7BF84C5699BA295EE19FB0E_terseLabel_en-US" xlink:label="lab_us-gaap_ProceedsFromSaleOfPropertyPlantAndEquipment_375A12D9A7BF84C5699BA295EE19FB0E" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Proceeds from sale of property and equipment</link:label>
    <link:label id="lab_us-gaap_ProceedsFromSaleOfPropertyPlantAndEquipment_375A12D9A7BF84C5699BA295EE19FB0E_label_en-US" xlink:label="lab_us-gaap_ProceedsFromSaleOfPropertyPlantAndEquipment_375A12D9A7BF84C5699BA295EE19FB0E" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Proceeds from Sale of Property, Plant, and Equipment</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ProceedsFromSaleOfPropertyPlantAndEquipment" xlink:label="loc_us-gaap_ProceedsFromSaleOfPropertyPlantAndEquipment_375A12D9A7BF84C5699BA295EE19FB0E" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ProceedsFromSaleOfPropertyPlantAndEquipment_375A12D9A7BF84C5699BA295EE19FB0E" xlink:to="lab_us-gaap_ProceedsFromSaleOfPropertyPlantAndEquipment_375A12D9A7BF84C5699BA295EE19FB0E" xlink:type="arc" />
    <link:label id="lab_us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_79B2EA5603269D3D3C2AA295EE196AA2_negatedLabel_en-US" xlink:label="lab_us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_79B2EA5603269D3D3C2AA295EE196AA2" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xml:lang="en-US">Purchases of property and equipment, net of trades</link:label>
    <link:label id="lab_us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_79B2EA5603269D3D3C2AA295EE196AA2_label_en-US" xlink:label="lab_us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_79B2EA5603269D3D3C2AA295EE196AA2" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Payments to Acquire Property, Plant, and Equipment</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PaymentsToAcquirePropertyPlantAndEquipment" xlink:label="loc_us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_79B2EA5603269D3D3C2AA295EE196AA2" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_79B2EA5603269D3D3C2AA295EE196AA2" xlink:to="lab_us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_79B2EA5603269D3D3C2AA295EE196AA2" xlink:type="arc" />
    <link:label id="lab_us-gaap_PaymentsForProceedsFromDelayedTaxExemptExchange_0B31DD79870E64F60D8AA295EE19B1A3_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_PaymentsForProceedsFromDelayedTaxExemptExchange_0B31DD79870E64F60D8AA295EE19B1A3" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Change in designated funds for equipment purchases</link:label>
    <link:label id="lab_us-gaap_PaymentsForProceedsFromDelayedTaxExemptExchange_0B31DD79870E64F60D8AA295EE19B1A3_label_en-US" xlink:label="lab_us-gaap_PaymentsForProceedsFromDelayedTaxExemptExchange_0B31DD79870E64F60D8AA295EE19B1A3" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Payments for (Proceeds from) Delayed Tax Exempt Exchange</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PaymentsForProceedsFromDelayedTaxExemptExchange" xlink:label="loc_us-gaap_PaymentsForProceedsFromDelayedTaxExemptExchange_0B31DD79870E64F60D8AA295EE19B1A3" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PaymentsForProceedsFromDelayedTaxExemptExchange_0B31DD79870E64F60D8AA295EE19B1A3" xlink:to="lab_us-gaap_PaymentsForProceedsFromDelayedTaxExemptExchange_0B31DD79870E64F60D8AA295EE19B1A3" xlink:type="arc" />
    <link:label id="lab_us-gaap_PaymentsForLossesAndLossAdjustmentExpense_22FEAEAAC3E6874A4319A295EE19E4DB_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_PaymentsForLossesAndLossAdjustmentExpense_22FEAEAAC3E6874A4319A295EE19E4DB" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Change in designated funds for claims acquired</link:label>
    <link:label id="lab_us-gaap_PaymentsForLossesAndLossAdjustmentExpense_22FEAEAAC3E6874A4319A295EE19E4DB_label_en-US" xlink:label="lab_us-gaap_PaymentsForLossesAndLossAdjustmentExpense_22FEAEAAC3E6874A4319A295EE19E4DB" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Liability for Unpaid Claims and Claims Adjustment Expense, Claims Paid</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PaymentsForLossesAndLossAdjustmentExpense" xlink:label="loc_us-gaap_PaymentsForLossesAndLossAdjustmentExpense_22FEAEAAC3E6874A4319A295EE19E4DB" xlink:type="locator" />
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    <link:label id="lab_us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired_BF5D33F853B2F9836A56A295EE195C16_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired_BF5D33F853B2F9836A56A295EE195C16" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Acquisition of business, net of cash acquired</link:label>
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    <link:label id="lab_us-gaap_PaymentsForProceedsFromOtherInvestingActivities_1D66CF8D5073D23F8A6AA295EE191819_negatedLabel_en-US" xlink:label="lab_us-gaap_PaymentsForProceedsFromOtherInvestingActivities_1D66CF8D5073D23F8A6AA295EE191819" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xml:lang="en-US">Change in other assets</link:label>
    <link:label id="lab_us-gaap_PaymentsForProceedsFromOtherInvestingActivities_1D66CF8D5073D23F8A6AA295EE191819_label_en-US" xlink:label="lab_us-gaap_PaymentsForProceedsFromOtherInvestingActivities_1D66CF8D5073D23F8A6AA295EE191819" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Payments for (Proceeds from) Other Investing Activities</link:label>
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    <link:label id="lab_us-gaap_NetCashProvidedByUsedInInvestingActivities_39BF3C78CCEB3B4D5A7CA295EE1932A5_totalLabel_en-US" xlink:label="lab_us-gaap_NetCashProvidedByUsedInInvestingActivities_39BF3C78CCEB3B4D5A7CA295EE1932A5" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Net cash used in investing activities</link:label>
    <link:label id="lab_us-gaap_NetCashProvidedByUsedInInvestingActivities_39BF3C78CCEB3B4D5A7CA295EE1932A5_label_en-US" xlink:label="lab_us-gaap_NetCashProvidedByUsedInInvestingActivities_39BF3C78CCEB3B4D5A7CA295EE1932A5" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Net Cash Provided by (Used in) Investing Activities</link:label>
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    <link:label id="lab_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_59FC32DF4051D7B65651A295EE19A7C9_terseLabel_en-US" xlink:label="lab_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_59FC32DF4051D7B65651A295EE19A7C9" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">FINANCING ACTIVITIES</link:label>
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    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract" xlink:label="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_59FC32DF4051D7B65651A295EE19A7C9" xlink:type="locator" />
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    <link:label id="lab_us-gaap_PaymentsOfDividendsCommonStock_43BD1391C0155E7E9595A295EE1908B2_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_PaymentsOfDividendsCommonStock_43BD1391C0155E7E9595A295EE1908B2" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Payments of cash dividends</link:label>
    <link:label id="lab_us-gaap_PaymentsOfDividendsCommonStock_43BD1391C0155E7E9595A295EE1908B2_label_en-US" xlink:label="lab_us-gaap_PaymentsOfDividendsCommonStock_43BD1391C0155E7E9595A295EE1908B2" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Payments of Ordinary Dividends, Common Stock</link:label>
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    <link:label id="lab_us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease_8FD285CB69A449F54B8AA295EE19D734_totalLabel_en-US" xlink:label="lab_us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease_8FD285CB69A449F54B8AA295EE19D734" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Net (decrease) increase in cash and cash equivalents</link:label>
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    <link:label id="lab_us-gaap_SupplementalCashFlowInformationAbstract_2BE6D7DC155FD3853637A295EE19E1FB_label_en-US" xlink:label="lab_us-gaap_SupplementalCashFlowInformationAbstract_2BE6D7DC155FD3853637A295EE19E1FB" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Supplemental Cash Flow Information [Abstract]</link:label>
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    <link:label id="lab_htld_FairValueOfRevenueEquipmentTraded_EA534264BFA8A6F657CFA295EE19C79E_label_en-US" xlink:label="lab_htld_FairValueOfRevenueEquipmentTraded_EA534264BFA8A6F657CFA295EE19C79E" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Fair value of revenue equipment traded</link:label>
    <link:label id="lab_htld_FairValueOfRevenueEquipmentTraded_EA534264BFA8A6F657CFA295EE19C79E_documentation_en-US" xlink:label="lab_htld_FairValueOfRevenueEquipmentTraded_EA534264BFA8A6F657CFA295EE19C79E" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Fair value of revenue equipment traded</link:label>
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    <link:label id="lab_us-gaap_CapitalExpendituresIncurredButNotYetPaid_B57A24487C73C23B9702A295EE197C76_terseLabel_en-US" xlink:label="lab_us-gaap_CapitalExpendituresIncurredButNotYetPaid_B57A24487C73C23B9702A295EE197C76" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Purchased property and equipment in accounts payable</link:label>
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    <link:label id="lab_htld_TreasuryStockAcquiredInAccountsPayable_7F1039FA84CBE3061A16A295EE19C0BA_terseLabel_en-US" xlink:label="lab_htld_TreasuryStockAcquiredInAccountsPayable_7F1039FA84CBE3061A16A295EE19C0BA" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Treasury stock acquired in accounts payable</link:label>
    <link:label id="lab_htld_TreasuryStockAcquiredInAccountsPayable_7F1039FA84CBE3061A16A295EE19C0BA_label_en-US" xlink:label="lab_htld_TreasuryStockAcquiredInAccountsPayable_7F1039FA84CBE3061A16A295EE19C0BA" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Treasury stock acquired in accounts payable</link:label>
    <link:label id="lab_htld_TreasuryStockAcquiredInAccountsPayable_7F1039FA84CBE3061A16A295EE19C0BA_documentation_en-US" xlink:label="lab_htld_TreasuryStockAcquiredInAccountsPayable_7F1039FA84CBE3061A16A295EE19C0BA" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Treasury stock acquired, not settled and in accounts payable at end of reporting period</link:label>
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    <link:label id="lab_htld_RelatedPartyAbstract_0F5972CC818949D475CBA18689A18C3A_label_en-US" xlink:label="lab_htld_RelatedPartyAbstract_0F5972CC818949D475CBA18689A18C3A" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Related Party [Abstract]</link:label>
    <link:label id="lab_htld_RelatedPartyAbstract_0F5972CC818949D475CBA18689A18C3A_documentation_en-US" xlink:label="lab_htld_RelatedPartyAbstract_0F5972CC818949D475CBA18689A18C3A" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Related Party [Abstract]</link:label>
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    <link:label id="lab_us-gaap_RelatedPartyTransactionsDisclosureTextBlock_B63F3BEBAC4BA7228675A18689A1DEF7_terseLabel_en-US" xlink:label="lab_us-gaap_RelatedPartyTransactionsDisclosureTextBlock_B63F3BEBAC4BA7228675A18689A1DEF7" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Related Party</link:label>
    <link:label id="lab_us-gaap_RelatedPartyTransactionsDisclosureTextBlock_B63F3BEBAC4BA7228675A18689A1DEF7_label_en-US" xlink:label="lab_us-gaap_RelatedPartyTransactionsDisclosureTextBlock_B63F3BEBAC4BA7228675A18689A1DEF7" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Related Party Transactions Disclosure [Text Block]</link:label>
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    <link:label id="lab_htld_LineofCreditLongTermDebtAbstract_F2A637A3C9D37D9EF8B6A18689E40E9C_label_en-US" xlink:label="lab_htld_LineofCreditLongTermDebtAbstract_F2A637A3C9D37D9EF8B6A18689E40E9C" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Line of Credit, Long-Term Debt [Abstract]</link:label>
    <link:label id="lab_htld_LineofCreditLongTermDebtAbstract_F2A637A3C9D37D9EF8B6A18689E40E9C_documentation_en-US" xlink:label="lab_htld_LineofCreditLongTermDebtAbstract_F2A637A3C9D37D9EF8B6A18689E40E9C" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Line of Credit, Long-Term Debt [Abstract]</link:label>
    <link:loc xlink:href="htld-20170930.xsd#htld_LineofCreditLongTermDebtAbstract" xlink:label="loc_htld_LineofCreditLongTermDebtAbstract_F2A637A3C9D37D9EF8B6A18689E40E9C" xlink:type="locator" />
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    <link:label id="lab_us-gaap_DebtInstrumentTable_B6783593ED5C3DD21254A18689E4D7BF_terseLabel_en-US" xlink:label="lab_us-gaap_DebtInstrumentTable_B6783593ED5C3DD21254A18689E4D7BF" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Schedule of Long-term Debt Instruments [Table]</link:label>
    <link:label id="lab_us-gaap_DebtInstrumentTable_B6783593ED5C3DD21254A18689E4D7BF_label_en-US" xlink:label="lab_us-gaap_DebtInstrumentTable_B6783593ED5C3DD21254A18689E4D7BF" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Schedule of Long-term Debt Instruments [Table]</link:label>
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    <link:label id="lab_us-gaap_VariableRateAxis_61BF37B45681A16EA078A18689E47104_terseLabel_en-US" xlink:label="lab_us-gaap_VariableRateAxis_61BF37B45681A16EA078A18689E47104" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Variable Rate [Axis]</link:label>
    <link:label id="lab_us-gaap_VariableRateAxis_61BF37B45681A16EA078A18689E47104_label_en-US" xlink:label="lab_us-gaap_VariableRateAxis_61BF37B45681A16EA078A18689E47104" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Variable Rate [Axis]</link:label>
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    <link:label id="lab_us-gaap_VariableRateDomain_2F4B51708CD8413C66F9A18689E45F5B_terseLabel_en-US" xlink:label="lab_us-gaap_VariableRateDomain_2F4B51708CD8413C66F9A18689E45F5B" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Variable Rate [Domain]</link:label>
    <link:label id="lab_us-gaap_VariableRateDomain_2F4B51708CD8413C66F9A18689E45F5B_label_en-US" xlink:label="lab_us-gaap_VariableRateDomain_2F4B51708CD8413C66F9A18689E45F5B" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Variable Rate [Domain]</link:label>
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    <link:label id="lab_us-gaap_LondonInterbankOfferedRateLIBORMember_0B423F9F7939065884E7A18689E4EEF9_terseLabel_en-US" xlink:label="lab_us-gaap_LondonInterbankOfferedRateLIBORMember_0B423F9F7939065884E7A18689E4EEF9" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">London Interbank Offered Rate (LIBOR) [Member]</link:label>
    <link:label id="lab_us-gaap_LondonInterbankOfferedRateLIBORMember_0B423F9F7939065884E7A18689E4EEF9_label_en-US" xlink:label="lab_us-gaap_LondonInterbankOfferedRateLIBORMember_0B423F9F7939065884E7A18689E4EEF9" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">London Interbank Offered Rate (LIBOR) [Member]</link:label>
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    <link:label id="lab_us-gaap_PrimeRateMember_1A39F394D05C99B61502A18689E45B1F_terseLabel_en-US" xlink:label="lab_us-gaap_PrimeRateMember_1A39F394D05C99B61502A18689E45B1F" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Prime Rate [Member]</link:label>
    <link:label id="lab_us-gaap_PrimeRateMember_1A39F394D05C99B61502A18689E45B1F_label_en-US" xlink:label="lab_us-gaap_PrimeRateMember_1A39F394D05C99B61502A18689E45B1F" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Prime Rate [Member]</link:label>
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    <link:label id="lab_us-gaap_DebtInstrumentLineItems_F0F3A3A164DFBE279E6AA18689E4A254_label_en-US" xlink:label="lab_us-gaap_DebtInstrumentLineItems_F0F3A3A164DFBE279E6AA18689E4A254" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Debt Instrument [Line Items]</link:label>
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