$HTLD
HEARTLAND EXPRESS INC Stock $htld

$htld Overview Financials Valuation SEC Filings Company Website

2017 Q3 Form 10-K Financial Statement

#000079923318000007 Filed on March 01, 2018

Income Statement

Concept	2017 Q3	2016 Q4	2016 Q3
Revenue	$182.1M	$140.0M	$149.3M
YoY Change	21.97%	-19.79%	-18.2%
Cost Of Revenue
YoY Change
Gross Profit
YoY Change
Gross Profit Margin
Selling, General & Admin	$139.8M	$92.60M	$102.8M
YoY Change	35.99%	-21.59%	-20.56%
% of Gross Profit
Research & Development
YoY Change
% of Gross Profit
Depreciation & Amortization	$28.80M	$26.80M	$27.20M
YoY Change	5.88%	-9.76%	-5.23%
% of Gross Profit
Operating Expenses	$176.6M	$121.0M	$130.9M
YoY Change	34.91%	-21.78%	-20.71%
Operating Profit	$13.00M	$20.90M	$19.91M
YoY Change	-34.72%	-24.61%	-19.9%
Interest Expense	$175.0K	$200.0K	$0.00
YoY Change		100.0%	-100.0%
% of Operating Profit	1.35%	0.96%	0.0%
Other Income/Expense, Net
YoY Change
Pretax Income	$13.06M	$21.07M	$20.04M
YoY Change	-34.81%	-24.13%	-19.61%
Income Tax	$5.146M	$8.000M	$7.510M
% Of Pretax Income	39.4%	37.97%	37.48%
Net Earnings	$7.916M	$13.11M	$12.53M
YoY Change	-36.81%	-22.93%	-17.11%
Net Earnings / Revenue	4.35%	9.36%	8.39%
Basic Earnings Per Share	$0.10	$0.16	$0.15
Diluted Earnings Per Share	$0.09	$0.16	$0.15
COMMON SHARES
Basic Shares Outstanding	83.30M shares	83.29M shares	83.29M shares
Diluted Shares Outstanding	83.33M shares		83.34M shares

Balance Sheet

Concept	2017 Q3	2016 Q4	2016 Q3
SHORT-TERM ASSETS
Cash & Short-Term Investments	$51.30M	$128.5M	$100.3M
YoY Change	-48.85%	287.05%	56.23%
Cash & Equivalents	$51.29M	$128.5M	$100.3M
Short-Term Investments
Other Short-Term Assets	$2.426M	$13.84M	$9.395M
YoY Change	-74.18%	66.44%	-61.46%
Inventory
Prepaid Expenses
Receivables	$70.76M	$46.84M	$51.70M
Other Receivables	$7.500M	$4.800M	$6.600M
Total Short-Term Assets	$171.7M	$202.1M	$176.7M
YoY Change	-2.8%	48.13%	-4.59%
LONG-TERM ASSETS
Property, Plant & Equipment	$71.96M	$407.6M	$436.8M
YoY Change	-83.52%	-14.0%	-4.31%
Goodwill	$0.00	$100.2M	$100.2M
YoY Change	-100.0%	0.0%	0.0%
Intangibles	$15.03M	$12.09M	$12.57M
YoY Change	19.57%	-13.72%	-13.66%
Long-Term Investments
YoY Change
Other Assets	$1.244M	$12.38M	$11.35M
YoY Change	-89.04%	8.97%	2.13%
Total Long-Term Assets	-$14.64M	$536.1M	$565.0M
YoY Change	-102.59%	-10.59%	-2.96%
TOTAL ASSETS
Total Short-Term Assets	$171.7M	$202.1M	$176.7M
Total Long-Term Assets	-$14.64M	$536.1M	$565.0M
Total Assets	$157.1M	$738.2M	$741.7M
YoY Change	-78.82%	0.3%	-3.35%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$26.40M	$12.40M	$16.80M
YoY Change	57.14%	65.33%	-31.98%
Accrued Expenses	$66.00M	$53.20M	$60.00M
YoY Change	10.0%	-9.37%	-1.32%
Deferred Revenue
YoY Change
Short-Term Debt	$0.00	$0.00	$0.00
YoY Change
Long-Term Debt Due
YoY Change
Total Short-Term Liabilities	$92.39M	$65.53M	$76.74M
YoY Change	20.39%	-0.96%	-10.27%
LONG-TERM LIABILITIES
Long-Term Debt	$0.00	$0.00	$0.00
YoY Change
Other Long-Term Liabilities	$72.10M	$0.00	$4.000M
YoY Change	1702.5%	-100.0%	-67.09%
Total Long-Term Liabilities	$167.8M	$166.9M	$170.7M
YoY Change	-1.72%	-16.54%	-9.82%
TOTAL LIABILITIES
Total Short-Term Liabilities	$92.39M	$65.53M	$76.74M
Total Long-Term Liabilities	$167.8M	$166.9M	$170.7M
Total Liabilities	$260.2M	$232.4M	$247.4M
YoY Change	5.14%	-12.66%	-9.96%
SHAREHOLDERS EQUITY
Retained Earnings	$657.2M	$625.7M	$614.2M
YoY Change	7.0%	8.63%	9.56%
Common Stock	$4.254M	$4.340M	$4.230M
YoY Change	0.57%	-13.77%	-12.77%
Preferred Stock
YoY Change
Treasury Stock (at cost)	$124.0M	$124.2M	$124.2M
YoY Change	-0.19%	11.82%	70.53%
Treasury Stock Shares	7.386M shares	7.402M shares	7.402M shares
Shareholders Equity	$537.5M	$505.8M	$494.3M
YoY Change
Total Liabilities & Shareholders Equity	$797.7M	$738.2M	$741.7M
YoY Change	7.55%	0.3%	-3.35%

Cashflow Statement

Concept	2017 Q3	2016 Q4	2016 Q3
OPERATING ACTIVITIES
Net Income	$7.916M	$13.11M	$12.53M
YoY Change	-36.81%	-22.93%	-17.11%
Depreciation, Depletion And Amortization	$28.80M	$26.80M	$27.20M
YoY Change	5.88%	-9.76%	-5.23%
Cash From Operating Activities	$26.40M	$35.60M	$42.30M
YoY Change	-37.59%	-25.21%	2.67%
INVESTING ACTIVITIES
Capital Expenditures	-$54.70M	-$16.10M	-$27.60M
YoY Change	98.19%	-84.75%	-41.28%
Acquisitions	$86.73M
YoY Change
Other Investing Activities	-$55.90M	$20.80M	$9.700M
YoY Change	-676.29%	-71.07%	-60.89%
Cash From Investing Activities	-$110.5M	$4.700M	-$18.00M
YoY Change	513.89%	-113.99%	-18.92%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net
YoY Change
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	-25.00M	-1.600M	-1.700M
YoY Change	1370.59%	-96.43%	-95.06%
NET CHANGE
Cash From Operating Activities	26.40M	35.60M	42.30M
Cash From Investing Activities	-110.5M	4.700M	-18.00M
Cash From Financing Activities	-25.00M	-1.600M	-1.700M
Net Change In Cash	-109.1M	38.70M	22.60M
YoY Change	-582.74%	-225.65%	-246.75%
FREE CASH FLOW
Cash From Operating Activities	$26.40M	$35.60M	$42.30M
Capital Expenditures	-$54.70M	-$16.10M	-$27.60M
Free Cash Flow	$81.10M	$51.70M	$69.90M
YoY Change	16.02%	-66.25%	-20.75%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
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CY2017	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2017
CY2017	dei	Document Period End Date DocumentPeriodEndDate	2017-12-31
CY2017	dei	Document Type DocumentType	10-K
CY2017	dei	Entity Central Index Key EntityCentralIndexKey	0000799233
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CY2017	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
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CY2017	dei	Entity Registrant Name EntityRegistrantName	HEARTLAND EXPRESS INC
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CY2017Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	26961000	USD
CY2016Q4	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	43065000	USD
CY2017Q4	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	26961000	USD
CY2016Q4	us-gaap	Deferred Tax Assets Net Noncurrent DeferredTaxAssetsNetNoncurrent	3785000	USD
CY2017Q4	us-gaap	Deferred Tax Assets Net Noncurrent DeferredTaxAssetsNetNoncurrent	1737000	USD
CY2016Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards DeferredTaxAssetsOperatingLossCarryforwards	451000	USD
CY2017Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards DeferredTaxAssetsOperatingLossCarryforwards	237000	USD
CY2016Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	2000	USD
CY2017Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	0	USD
CY2016Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense DeferredTaxAssetsTaxDeferredExpense	3334000	USD
CY2017Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense DeferredTaxAssetsTaxDeferredExpense	1278000	USD
CY2016Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Share Based Compensation Cost DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost	254000	USD
CY2017Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Share Based Compensation Cost DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost	156000	USD
CY2016Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Accrued Liabilities DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAccruedLiabilities	9275000	USD
CY2017Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Accrued Liabilities DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAccruedLiabilities	6550000	USD
CY2016Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Allowance For Doubtful Accounts DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAllowanceForDoubtfulAccounts	559000	USD
CY2017Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Allowance For Doubtful Accounts DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAllowanceForDoubtfulAccounts	515000	USD
CY2016Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Self Insurance DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsSelfInsurance	29190000	USD
CY2017Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Self Insurance DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsSelfInsurance	18225000	USD
CY2016Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	0	USD
CY2017Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	0	USD
CY2016Q4	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	90872000	USD
CY2017Q4	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	63751000	USD
CY2016Q4	us-gaap	Deferred Tax Liabilities Goodwill And Intangible Assets DeferredTaxLiabilitiesGoodwillAndIntangibleAssets	9857000	USD
CY2017Q4	us-gaap	Deferred Tax Liabilities Goodwill And Intangible Assets DeferredTaxLiabilitiesGoodwillAndIntangibleAssets	7984000	USD
CY2016Q4	us-gaap	Deferred Tax Liabilities Noncurrent DeferredTaxLiabilitiesNoncurrent	94657000	USD
CY2017Q4	us-gaap	Deferred Tax Liabilities Noncurrent DeferredTaxLiabilitiesNoncurrent	65488000	USD
CY2016Q4	us-gaap	Deferred Tax Liabilities Prepaid Expenses DeferredTaxLiabilitiesPrepaidExpenses	1713000	USD
CY2017Q4	us-gaap	Deferred Tax Liabilities Prepaid Expenses DeferredTaxLiabilitiesPrepaidExpenses	1406000	USD
CY2016Q4	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	122367000	USD
CY2017Q4	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	81322000	USD
CY2015	us-gaap	Defined Contribution Plan Cost Recognized DefinedContributionPlanCostRecognized	2100000	USD
CY2016	us-gaap	Defined Contribution Plan Cost Recognized DefinedContributionPlanCostRecognized	1700000	USD
CY2017	us-gaap	Defined Contribution Plan Cost Recognized DefinedContributionPlanCostRecognized	1800000	USD
CY2015	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	111848000	USD
CY2016	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	105580000	USD
CY2017	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	103905000	USD
CY2015	us-gaap	Direct Communications And Utilities Costs DirectCommunicationsAndUtilitiesCosts	6001000	USD
CY2016	us-gaap	Direct Communications And Utilities Costs DirectCommunicationsAndUtilitiesCosts	4485000	USD
CY2017	us-gaap	Direct Communications And Utilities Costs DirectCommunicationsAndUtilitiesCosts	5781000	USD
CY2015	us-gaap	Dividends Common Stock DividendsCommonStock	6942000	USD
CY2016	us-gaap	Dividends Common Stock DividendsCommonStock	6666000	USD
CY2017	us-gaap	Dividends Common Stock DividendsCommonStock	6667000	USD
CY2017Q4	us-gaap	Employee Related Liabilities Current EmployeeRelatedLiabilitiesCurrent	26752000	USD
CY2017Q4	us-gaap	Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized	600000	USD
CY2017	us-gaap	Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized Period For Recognition1 EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1	P1Y2M4D
CY2016Q4	us-gaap	Due To Related Parties Current DueToRelatedPartiesCurrent	100000	USD
CY2017Q4	us-gaap	Due To Related Parties Current DueToRelatedPartiesCurrent	100000	USD
CY2015	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.84
CY2016Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.17
CY2016Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.20
CY2016Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.15
CY2016Q4	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.16
CY2016	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.68
CY2017Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.17
CY2017Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.18
CY2017Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.10
CY2017Q4	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.45
CY2017	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.90
CY2015	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.84
CY2016Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.17
CY2016Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.20
CY2016Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.15
CY2016Q4	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.16
CY2016	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.68
CY2017Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.17
CY2017Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.18
CY2017Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.09
CY2017Q4	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.45
CY2017	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.90
CY2018	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.21	Rate
CY2016Q4	us-gaap	Employee Related Liabilities Current EmployeeRelatedLiabilitiesCurrent	23320000	USD
CY2017Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Next Rolling Twelve Months FiniteLivedIntangibleAssetsAmortizationExpenseNextRollingTwelveMonths	2500000	USD
CY2016Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	6010000	USD
CY2017Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	8878000	USD
CY2017Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Five FiniteLivedIntangibleAssetsAmortizationExpenseYearFive	1100000	USD
CY2017Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Four FiniteLivedIntangibleAssetsAmortizationExpenseYearFour	1200000	USD
CY2017Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Three FiniteLivedIntangibleAssetsAmortizationExpenseYearThree	1200000	USD
CY2017Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Two FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo	2200000	USD
CY2016Q4	us-gaap	Finite Lived Intangible Assets Gross FiniteLivedIntangibleAssetsGross	18100000	USD
CY2017Q4	us-gaap	Finite Lived Intangible Assets Gross FiniteLivedIntangibleAssetsGross	25900000	USD
CY2016Q4	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	12090000	USD
CY2017Q4	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	17022000	USD
CY2015	us-gaap	Fuel Costs FuelCosts	123714000	USD
CY2016	us-gaap	Fuel Costs FuelCosts	91494000	USD
CY2017	us-gaap	Fuel Costs FuelCosts	104381000	USD
CY2016Q4	us-gaap	Furniture And Fixtures Gross FurnitureAndFixturesGross	2096000	USD
CY2017Q4	us-gaap	Furniture And Fixtures Gross FurnitureAndFixturesGross	3437000	USD
CY2015	us-gaap	Gain Loss On Disposition Of Assets GainLossOnDispositionOfAssets	35040000	USD
CY2016	us-gaap	Gain Loss On Disposition Of Assets GainLossOnDispositionOfAssets	9205000	USD
CY2017	us-gaap	Gain Loss On Disposition Of Assets GainLossOnDispositionOfAssets	26674000	USD
CY2016Q4	us-gaap	Goodwill Goodwill	100212000	USD
CY2017Q4	us-gaap	Goodwill Goodwill	132410000	USD
CY2017Q3	us-gaap	Goodwill Goodwill	32198000	USD
CY2015	us-gaap	Goodwill Impairment Loss GoodwillImpairmentLoss	0	USD
CY2016	us-gaap	Goodwill Impairment Loss GoodwillImpairmentLoss	0	USD
CY2017	us-gaap	Goodwill Impairment Loss GoodwillImpairmentLoss	0	USD
CY2016Q4	us-gaap	Held To Maturity Securities HeldToMaturitySecurities	1400000	USD
CY2017Q4	us-gaap	Held To Maturity Securities HeldToMaturitySecurities	1400000	USD
CY2015	us-gaap	Impairment Of Intangible Assets Indefinitelived Excluding Goodwill ImpairmentOfIntangibleAssetsIndefinitelivedExcludingGoodwill	0	USD
CY2016	us-gaap	Impairment Of Intangible Assets Indefinitelived Excluding Goodwill ImpairmentOfIntangibleAssetsIndefinitelivedExcludingGoodwill	0	USD
CY2017	us-gaap	Impairment Of Intangible Assets Indefinitelived Excluding Goodwill ImpairmentOfIntangibleAssetsIndefinitelivedExcludingGoodwill	0	USD
CY2015	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	116771000	USD
CY2016Q1	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	20325000	USD
CY2016Q2	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	24616000	USD
CY2016Q3	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	20037000	USD
CY2016Q4	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	21071000	USD
CY2016	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	86049000	USD
CY2017Q1	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	19651000	USD
CY2017Q2	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	21737000	USD
CY2017Q3	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	13062000	USD
CY2017Q4	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	10048000	USD
CY2017	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	64498000	USD
CY2015	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	43715000	USD
CY2016	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	29663000	USD
CY2017	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-10675000	USD
CY2015	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	40870000	USD
CY2016	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	30117000	USD
CY2017	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	22574000	USD
CY2015	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	-165000	USD
CY2016	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	-109000	USD
CY2017	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	577000	USD
CY2015	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	4022000	USD
CY2016	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	1135000	USD
CY2017	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	178000	USD
CY2015	us-gaap	Income Tax Reconciliation Tax Contingencies IncomeTaxReconciliationTaxContingencies	-1006000	USD
CY2016	us-gaap	Income Tax Reconciliation Tax Contingencies IncomeTaxReconciliationTaxContingencies	-1473000	USD
CY2017	us-gaap	Income Tax Reconciliation Tax Contingencies IncomeTaxReconciliationTaxContingencies	-1208000	USD
CY2015	us-gaap	Income Tax Reconciliation Tax Exempt Income IncomeTaxReconciliationTaxExemptIncome	6000	USD
CY2016	us-gaap	Income Tax Reconciliation Tax Exempt Income IncomeTaxReconciliationTaxExemptIncome	7000	USD
CY2017	us-gaap	Income Tax Reconciliation Tax Exempt Income IncomeTaxReconciliationTaxExemptIncome	7000	USD
CY2015	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	24701000	USD
CY2016	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	35537000	USD
CY2017	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	21909000	USD
CY2016Q4	us-gaap	Income Taxes Receivable IncomeTaxesReceivable	4738000	USD
CY2017Q4	us-gaap	Income Taxes Receivable IncomeTaxesReceivable	6393000	USD
CY2015	us-gaap	Increase Decrease In Accounts Payable And Accrued Liabilities IncreaseDecreaseInAccountsPayableAndAccruedLiabilities	202000	USD
CY2016	us-gaap	Increase Decrease In Accounts Payable And Accrued Liabilities IncreaseDecreaseInAccountsPayableAndAccruedLiabilities	-11063000	USD
CY2017	us-gaap	Increase Decrease In Accounts Payable And Accrued Liabilities IncreaseDecreaseInAccountsPayableAndAccruedLiabilities	-26893000	USD
CY2015	us-gaap	Increase Decrease In Accrued Income Taxes Payable IncreaseDecreaseInAccruedIncomeTaxesPayable	10211000	USD
CY2016	us-gaap	Increase Decrease In Accrued Income Taxes Payable IncreaseDecreaseInAccruedIncomeTaxesPayable	-1371000	USD
CY2017	us-gaap	Increase Decrease In Accrued Income Taxes Payable IncreaseDecreaseInAccruedIncomeTaxesPayable	-5462000	USD
CY2015	us-gaap	Increase Decrease In Deferred Income Taxes IncreaseDecreaseInDeferredIncomeTaxes	-8618000	USD
CY2016	us-gaap	Increase Decrease In Deferred Income Taxes IncreaseDecreaseInDeferredIncomeTaxes	4584000	USD
CY2017	us-gaap	Increase Decrease In Deferred Income Taxes IncreaseDecreaseInDeferredIncomeTaxes	27121000	USD
CY2015	us-gaap	Increase Decrease In Prepaid Deferred Expense And Other Assets IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets	-4301000	USD
CY2016	us-gaap	Increase Decrease In Prepaid Deferred Expense And Other Assets IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets	-5017000	USD
CY2017	us-gaap	Increase Decrease In Prepaid Deferred Expense And Other Assets IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets	-860000	USD
CY2015	us-gaap	Increase Decrease In Receivables IncreaseDecreaseInReceivables	-16025000	USD
CY2016	us-gaap	Increase Decrease In Receivables IncreaseDecreaseInReceivables	-14165000	USD
CY2017	us-gaap	Increase Decrease In Receivables IncreaseDecreaseInReceivables	-15239000	USD
CY2017Q4	us-gaap	Increase In Unrecognized Tax Benefits Is Reasonably Possible IncreaseInUnrecognizedTaxBenefitsIsReasonablyPossible	3200000	USD
CY2015	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	135000	shares
CY2016	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	68000	shares
CY2017	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	38000	shares
CY2017Q3	us-gaap	Intangible Assets Current IntangibleAssetsCurrent	7800000	USD
CY2016Q4	us-gaap	Intangible Assets Net Excluding Goodwill IntangibleAssetsNetExcludingGoodwill	12090000	USD
CY2017Q4	us-gaap	Intangible Assets Net Excluding Goodwill IntangibleAssetsNetExcludingGoodwill	17022000	USD
CY2015	us-gaap	Interest Expense Debt InterestExpenseDebt	19000	USD
CY2016	us-gaap	Interest Expense Debt InterestExpenseDebt	0	USD
CY2017	us-gaap	Interest Expense Debt InterestExpenseDebt	175000	USD
CY2015	us-gaap	Interest Paid InterestPaid	40000	USD
CY2016	us-gaap	Interest Paid InterestPaid	0	USD
CY2017	us-gaap	Interest Paid InterestPaid	153000	USD
CY2015	us-gaap	Investment Income Interest InvestmentIncomeInterest	210000	USD
CY2016	us-gaap	Investment Income Interest InvestmentIncomeInterest	481000	USD
CY2016Q4	us-gaap	Land And Land Improvements LandAndLandImprovements	39356000	USD
CY2017	us-gaap	Investment Income Interest InvestmentIncomeInterest	1129000	USD
CY2015	us-gaap	Labor And Related Expense LaborAndRelatedExpense	277318000	USD
CY2016	us-gaap	Labor And Related Expense LaborAndRelatedExpense	231980000	USD
CY2017	us-gaap	Labor And Related Expense LaborAndRelatedExpense	236872000	USD
CY2017Q4	us-gaap	Land And Land Improvements LandAndLandImprovements	40283000	USD
CY2015	us-gaap	Lease And Rental Expense LeaseAndRentalExpense	3300000	USD
CY2016	us-gaap	Lease And Rental Expense LeaseAndRentalExpense	1000000	USD
CY2017	us-gaap	Lease And Rental Expense LeaseAndRentalExpense	8000000	USD
CY2016Q4	us-gaap	Leasehold Improvements Gross LeaseholdImprovementsGross	1703000	USD
CY2017Q4	us-gaap	Leasehold Improvements Gross LeaseholdImprovementsGross	2208000	USD
CY2017Q4	us-gaap	Letters Of Credit Outstanding Amount LettersOfCreditOutstandingAmount	6800000	USD
CY2016Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	738228000	USD
CY2017Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	789127000	USD
CY2016Q4	us-gaap	Liabilities Current LiabilitiesCurrent	65534000	USD
CY2017Q4	us-gaap	Liabilities Current LiabilitiesCurrent	75321000	USD
CY2016Q4	us-gaap	Liabilities Noncurrent LiabilitiesNoncurrent	166868000	USD
CY2017Q4	us-gaap	Liabilities Noncurrent LiabilitiesNoncurrent	139161000	USD
CY2016Q4	us-gaap	Line Of Credit LineOfCredit	0	USD
CY2017Q4	us-gaap	Line Of Credit LineOfCredit	0	USD
CY2017	us-gaap	Line Of Credit Facility Commitment Fee Percentage LineOfCreditFacilityCommitmentFeePercentage	0.000625
CY2013Q4	us-gaap	Line Of Credit Facility Maximum Borrowing Capacity LineOfCreditFacilityMaximumBorrowingCapacity	250000000	USD
CY2016Q4	us-gaap	Line Of Credit Facility Maximum Borrowing Capacity LineOfCreditFacilityMaximumBorrowingCapacity	175000000	USD
CY2016Q4	us-gaap	Line Of Credit Facility Remaining Borrowing Capacity LineOfCreditFacilityRemainingBorrowingCapacity	169500000	USD
CY2017Q4	us-gaap	Line Of Credit Facility Remaining Borrowing Capacity LineOfCreditFacilityRemainingBorrowingCapacity	171300000	USD
CY2017Q3	us-gaap	Long Term Debt LongTermDebt	17404000	USD
CY2016Q4	us-gaap	Machinery And Equipment Gross MachineryAndEquipmentGross	11009000	USD
CY2017Q4	us-gaap	Machinery And Equipment Gross MachineryAndEquipmentGross	12202000	USD
CY2015	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-107330000	USD
CY2016	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-21344000	USD
CY2017	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-30168000	USD
CY2015	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-67213000	USD
CY2016	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-39162000	USD
CY2017	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-132499000	USD
CY2015	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	190472000	USD
CY2016	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	155781000	USD
CY2017	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	109538000	USD
CY2015	us-gaap	Net Income Loss NetIncomeLoss	73056000	USD
CY2016Q1	us-gaap	Net Income Loss NetIncomeLoss	14377000	USD
CY2016Q2	us-gaap	Net Income Loss NetIncomeLoss	16368000	USD
CY2016Q3	us-gaap	Net Income Loss NetIncomeLoss	12527000	USD
CY2016Q4	us-gaap	Net Income Loss NetIncomeLoss	13114000	USD
CY2016	us-gaap	Net Income Loss NetIncomeLoss	56386000	USD
CY2017Q1	us-gaap	Net Income Loss NetIncomeLoss	14036000	USD
CY2017Q2	us-gaap	Net Income Loss NetIncomeLoss	14616000	USD
CY2017Q3	us-gaap	Net Income Loss NetIncomeLoss	7916000	USD
CY2017Q4	us-gaap	Net Income Loss NetIncomeLoss	38605000	USD
CY2017	us-gaap	Net Income Loss NetIncomeLoss	75173000	USD
CY2015	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	73056000	USD
CY2016	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	56386000	USD
CY2017	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	75173000	USD
CY2017	us-gaap	Number Of Reportable Segments NumberOfReportableSegments	1	segments
CY2015	us-gaap	Operating Income Loss OperatingIncomeLoss	116580000	USD
CY2016Q1	us-gaap	Operating Income Loss OperatingIncomeLoss	20250000	USD
CY2016Q2	us-gaap	Operating Income Loss OperatingIncomeLoss	24507000	USD
CY2016Q3	us-gaap	Operating Income Loss OperatingIncomeLoss	19913000	USD
CY2016Q4	us-gaap	Operating Income Loss OperatingIncomeLoss	20898000	USD
CY2016	us-gaap	Operating Income Loss OperatingIncomeLoss	85568000	USD
CY2017Q1	us-gaap	Operating Income Loss OperatingIncomeLoss	19363000	USD
CY2017Q2	us-gaap	Operating Income Loss OperatingIncomeLoss	21313000	USD
CY2017Q3	us-gaap	Operating Income Loss OperatingIncomeLoss	12999000	USD
CY2017Q4	us-gaap	Operating Income Loss OperatingIncomeLoss	9869000	USD
CY2017	us-gaap	Operating Income Loss OperatingIncomeLoss	63544000	USD
CY2015	us-gaap	Operating Insurance And Claims Costs Production OperatingInsuranceAndClaimsCostsProduction	21618000	USD
CY2016	us-gaap	Operating Insurance And Claims Costs Production OperatingInsuranceAndClaimsCostsProduction	24449000	USD
CY2017	us-gaap	Operating Insurance And Claims Costs Production OperatingInsuranceAndClaimsCostsProduction	18850000	USD
CY2017Q4	us-gaap	Operating Leases Future Minimum Payments Due OperatingLeasesFutureMinimumPaymentsDue	44402000	USD
CY2017Q4	us-gaap	Operating Leases Future Minimum Payments Due Current OperatingLeasesFutureMinimumPaymentsDueCurrent	13041000	USD
CY2017Q4	us-gaap	Operating Leases Future Minimum Payments Due In Four Years OperatingLeasesFutureMinimumPaymentsDueInFourYears	5699000	USD
CY2017Q4	us-gaap	Operating Leases Future Minimum Payments Due In Three Years OperatingLeasesFutureMinimumPaymentsDueInThreeYears	6268000	USD
CY2017Q4	us-gaap	Operating Leases Future Minimum Payments Due In Two Years OperatingLeasesFutureMinimumPaymentsDueInTwoYears	9227000	USD
CY2017Q4	us-gaap	Operating Leases Future Minimum Payments Due Thereafter OperatingLeasesFutureMinimumPaymentsDueThereafter	10167000	USD
CY2016Q4	us-gaap	Other Accrued Liabilities Current OtherAccruedLiabilitiesCurrent	10727000	USD
CY2017Q4	us-gaap	Other Accrued Liabilities Current OtherAccruedLiabilitiesCurrent	12835000	USD
CY2017Q3	us-gaap	Other Accrued Liabilities Current OtherAccruedLiabilitiesCurrent	596000	USD
CY2016Q4	us-gaap	Other Assets Current OtherAssetsCurrent	13841000	USD
CY2017Q4	us-gaap	Other Assets Current OtherAssetsCurrent	13782000	USD
CY2017Q3	us-gaap	Other Assets Current OtherAssetsCurrent	2426000	USD
CY2016Q4	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	12382000	USD
CY2017Q4	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	24261000	USD
CY2017Q3	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	1244000	USD
CY2015	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	0	USD
CY2016	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	0	USD
CY2017	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	0	USD
CY2015	us-gaap	Other Cost And Expense Operating OtherCostAndExpenseOperating	28572000	USD
CY2016	us-gaap	Other Cost And Expense Operating OtherCostAndExpenseOperating	13385000	USD
CY2017	us-gaap	Other Cost And Expense Operating OtherCostAndExpenseOperating	24666000	USD
CY2016Q4	us-gaap	Other Prepaid Expense Current OtherPrepaidExpenseCurrent	8181000	USD
CY2017Q4	us-gaap	Other Prepaid Expense Current OtherPrepaidExpenseCurrent	10989000	USD
CY2015	us-gaap	Payments For Losses And Loss Adjustment Expense PaymentsForLossesAndLossAdjustmentExpense	0	USD
CY2016	us-gaap	Payments For Losses And Loss Adjustment Expense PaymentsForLossesAndLossAdjustmentExpense	0	USD
CY2017	us-gaap	Payments For Losses And Loss Adjustment Expense PaymentsForLossesAndLossAdjustmentExpense	13899000	USD
CY2015	us-gaap	Payments For Proceeds From Delayed Tax Exempt Exchange PaymentsForProceedsFromDelayedTaxExemptExchange	0	USD
CY2016	us-gaap	Payments For Proceeds From Delayed Tax Exempt Exchange PaymentsForProceedsFromDelayedTaxExemptExchange	9335000	USD
CY2017	us-gaap	Payments For Proceeds From Delayed Tax Exempt Exchange PaymentsForProceedsFromDelayedTaxExemptExchange	-4843000	USD
CY2015	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	-1248000	USD
CY2016	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	1019000	USD
CY2017	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	179000	USD
CY2015	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	74024000	USD
CY2016	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	14678000	USD
CY2017	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	0	USD
CY2015	us-gaap	Payments Of Dividends PaymentsOfDividends	6900000	USD
CY2016	us-gaap	Payments Of Dividends PaymentsOfDividends	6700000	USD
CY2017	us-gaap	Payments Of Dividends PaymentsOfDividends	6700000	USD
CY2015	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	6942000	USD
CY2016	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	6666000	USD
CY2017	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	6667000	USD
CY2015	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	0	USD
CY2016	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	0	USD
CY2017	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	198000	USD
CY2017Q3	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	86728000	USD
CY2015	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	0	USD
CY2016	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	0	USD
CY2017	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	86728000	USD
CY2017Q3	us-gaap	Payments To Acquire Intangible Assets PaymentsToAcquireIntangibleAssets	6316000	USD
CY2015	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	217253000	USD
CY2016	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	86088000	USD
CY2017	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	184114000	USD
CY2016Q4	us-gaap	Preferred Stock Par Or Stated Value Per Share PreferredStockParOrStatedValuePerShare	0.01
CY2017Q4	us-gaap	Preferred Stock Par Or Stated Value Per Share PreferredStockParOrStatedValuePerShare	0.01
CY2016Q4	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	5000000	shares
CY2017Q4	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	5000000	shares
CY2016Q4	us-gaap	Preferred Stock Shares Issued PreferredStockSharesIssued	0	shares
CY2017Q4	us-gaap	Preferred Stock Shares Issued PreferredStockSharesIssued	0	shares
CY2016Q4	us-gaap	Preferred Stock Value PreferredStockValue	0	USD
CY2017Q4	us-gaap	Preferred Stock Value PreferredStockValue	0	USD
CY2015	us-gaap	Proceeds From Sale Of Property Plant And Equipment ProceedsFromSaleOfPropertyPlantAndEquipment	148792000	USD
CY2016	us-gaap	Proceeds From Sale Of Property Plant And Equipment ProceedsFromSaleOfPropertyPlantAndEquipment	57280000	USD
CY2017	us-gaap	Proceeds From Sale Of Property Plant And Equipment ProceedsFromSaleOfPropertyPlantAndEquipment	147578000	USD
CY2016Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	659053000	USD
CY2017Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	666763000	USD
CY2016Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	407648000	USD
CY2017Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	442862000	USD
CY2017	us-gaap	Related Party Transaction Expenses From Transactions With Related Party RelatedPartyTransactionExpensesFromTransactionsWithRelatedParty	2263000	USD
CY2015	us-gaap	Repayments Of Lines Of Credit RepaymentsOfLinesOfCredit	24600000	USD
CY2016	us-gaap	Repayments Of Lines Of Credit RepaymentsOfLinesOfCredit	0	USD
CY2017Q3	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	71964000	USD
CY2015Q4	us-gaap	Purchase Options Land PurchaseOptionsLand	21600000	USD
CY2015	us-gaap	Related Party Transaction Expenses From Transactions With Related Party RelatedPartyTransactionExpensesFromTransactionsWithRelatedParty	53039000	USD
CY2016	us-gaap	Related Party Transaction Expenses From Transactions With Related Party RelatedPartyTransactionExpensesFromTransactionsWithRelatedParty	8154000	USD
CY2017	us-gaap	Repayments Of Lines Of Credit RepaymentsOfLinesOfCredit	23303000	USD
CY2016Q4	us-gaap	Restricted Cash And Cash Equivalents RestrictedCashAndCashEquivalents	21700000	USD
CY2017Q4	us-gaap	Restricted Cash And Cash Equivalents RestrictedCashAndCashEquivalents	30700000	USD
CY2016Q4	us-gaap	Restricted Cash And Cash Equivalents At Carrying Value RestrictedCashAndCashEquivalentsAtCarryingValue	9300000	USD
CY2017Q4	us-gaap	Restricted Cash And Cash Equivalents At Carrying Value RestrictedCashAndCashEquivalentsAtCarryingValue	7900000	USD
CY2016Q4	us-gaap	Restricted Cash And Cash Equivalents Noncurrent RestrictedCashAndCashEquivalentsNoncurrent	12400000	USD
CY2017Q4	us-gaap	Restricted Cash And Cash Equivalents Noncurrent RestrictedCashAndCashEquivalentsNoncurrent	22800000	USD
CY2016Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	625668000	USD
CY2017Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	694174000	USD
CY2015	us-gaap	Revenues Revenues	736345000	USD
CY2016Q1	us-gaap	Revenues Revenues	162786000	USD
CY2016Q2	us-gaap	Revenues Revenues	160791000	USD
CY2016Q3	us-gaap	Revenues Revenues	149316000	USD
CY2016Q4	us-gaap	Revenues Revenues	140044000	USD
CY2016	us-gaap	Revenues Revenues	612937000	USD
CY2017Q1	us-gaap	Revenues Revenues	129903000	USD
CY2017Q2	us-gaap	Revenues Revenues	129616000	USD
CY2017Q3	us-gaap	Revenues Revenues	182114000	USD
CY2017Q4	us-gaap	Revenues Revenues	165703000	USD
CY2017	us-gaap	Revenues Revenues	607336000	USD
CY2017Q3	us-gaap	Self Insurance Reserve SelfInsuranceReserve	10826000	USD
CY2016Q4	us-gaap	Self Insurance Reserve Current SelfInsuranceReserveCurrent	19132000	USD
CY2017Q4	us-gaap	Self Insurance Reserve Current SelfInsuranceReserveCurrent	21368000	USD
CY2016Q4	us-gaap	Self Insurance Reserve Noncurrent SelfInsuranceReserveNoncurrent	60257000	USD
CY2017Q4	us-gaap	Self Insurance Reserve Noncurrent SelfInsuranceReserveNoncurrent	65526000	USD
	us-gaap	Share Based Compensation ShareBasedCompensation	8800000	USD
CY2015	us-gaap	Share Based Compensation ShareBasedCompensation	1212000	USD
CY2016	us-gaap	Share Based Compensation ShareBasedCompensation	1285000	USD
CY2017	us-gaap	Share Based Compensation ShareBasedCompensation	510000	USD
CY2015	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Forfeited In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod	0	shares
CY2016	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Forfeited In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod	1200	shares
CY2017	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Forfeited In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod	1000	shares
CY2015	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Forfeitures Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue	0.00
CY2016	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Forfeitures Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue	22.21
CY2017	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Forfeitures Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue	17.11
CY2015	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Grants In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod	17900	shares
CY2016	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Grants In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod	74000	shares
CY2017	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Grants In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod	27000	shares
CY2015	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Grants In Period Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue	20.92
CY2016	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Grants In Period Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue	17.27
CY2017	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Grants In Period Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue	22.98
CY2014Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Nonvested Number ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber	183100	shares
CY2015Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Nonvested Number ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber	102400	shares
CY2016Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Nonvested Number ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber	53000	shares
CY2017Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Nonvested Number ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber	53700	shares
CY2018Q1	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Nonvested Number ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber	40250	shares
CY2014Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Nonvested Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue	16.78
CY2015Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Nonvested Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue	18.36
CY2016Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Nonvested Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue	21.53
CY2017Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Nonvested Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue	21.82
CY2015	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Vested In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod	98600	shares
CY2016	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Vested In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod	122200	shares
CY2017	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Vested In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod	25300	shares
CY2015	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Vested In Period Total Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalFairValue	1600000	USD
CY2016	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Vested In Period Total Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalFairValue	2000000	USD
CY2017	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Vested In Period Total Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalFairValue	600000	USD
CY2015	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Vested In Period Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue	16.49
CY2016	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Vested In Period Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue	16.21
CY2017	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Vested In Period Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue	22.07
CY2015	us-gaap	Stock Issued During Period Value Share Based Compensation StockIssuedDuringPeriodValueShareBasedCompensation	1251000	USD
CY2016	us-gaap	Stock Issued During Period Value Share Based Compensation StockIssuedDuringPeriodValueShareBasedCompensation	856000	USD
CY2017	us-gaap	Stock Issued During Period Value Share Based Compensation StockIssuedDuringPeriodValueShareBasedCompensation	313000	USD
CY2015	us-gaap	Stock Repurchased During Period Value StockRepurchasedDuringPeriodValue	74024000	USD
CY2016	us-gaap	Stock Repurchased During Period Value StockRepurchasedDuringPeriodValue	14678000	USD
CY2014Q4	us-gaap	Stockholders Equity StockholdersEquity	476587000	USD
CY2015Q4	us-gaap	Stockholders Equity StockholdersEquity	469928000	USD
CY2016Q4	us-gaap	Stockholders Equity StockholdersEquity	505826000	USD
CY2017Q4	us-gaap	Stockholders Equity StockholdersEquity	574645000	USD
CY2016Q4	us-gaap	Treasury Stock Shares TreasuryStockShares	7402000	shares
CY2017Q4	us-gaap	Treasury Stock Shares TreasuryStockShares	7386000	shares
CY2015	us-gaap	Treasury Stock Shares Acquired TreasuryStockSharesAcquired	3757000	shares
CY2016	us-gaap	Treasury Stock Shares Acquired TreasuryStockSharesAcquired	922000	shares
CY2017	us-gaap	Treasury Stock Shares Acquired TreasuryStockSharesAcquired	0	shares
CY2016Q4	us-gaap	Treasury Stock Value TreasuryStockValue	124182000	USD
CY2017Q4	us-gaap	Treasury Stock Value TreasuryStockValue	123954000	USD
CY2015Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	11569000	USD
CY2016Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	8751000	USD
CY2016Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	8800000	USD
CY2017Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	5839000	USD
CY2017Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	5800000	USD
CY2016	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions	108000	USD
CY2017	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions	331000	USD
CY2016	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Settlements With Taxing Authorities UnrecognizedTaxBenefitsDecreasesResultingFromSettlementsWithTaxingAuthorities	0	USD
CY2017	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Settlements With Taxing Authorities UnrecognizedTaxBenefitsDecreasesResultingFromSettlementsWithTaxingAuthorities	17000	USD
CY2017Q4	us-gaap	Unrecognized Tax Benefits Income Tax Penalties And Interest Accrued UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued	2300000	USD
CY2015	us-gaap	Unrecognized Tax Benefits Income Tax Penalties And Interest Expense UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestExpense	-1000000	USD
CY2016	us-gaap	Unrecognized Tax Benefits Income Tax Penalties And Interest Expense UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestExpense	-1500000	USD
CY2017	us-gaap	Unrecognized Tax Benefits Income Tax Penalties And Interest Expense UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestExpense	-900000	USD
CY2016	us-gaap	Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions	592000	USD
CY2017	us-gaap	Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions	135000	USD
CY2016	us-gaap	Unrecognized Tax Benefits Increases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions	0	USD
CY2017	us-gaap	Unrecognized Tax Benefits Increases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions	0	USD
CY2016	us-gaap	Unrecognized Tax Benefits Period Increase Decrease UnrecognizedTaxBenefitsPeriodIncreaseDecrease	-2800000	USD
CY2017	us-gaap	Unrecognized Tax Benefits Period Increase Decrease UnrecognizedTaxBenefitsPeriodIncreaseDecrease	-2900000	USD
CY2016	us-gaap	Unrecognized Tax Benefits Reductions Resulting From Lapse Of Applicable Statute Of Limitations UnrecognizedTaxBenefitsReductionsResultingFromLapseOfApplicableStatuteOfLimitations	3302000	USD
CY2017	us-gaap	Unrecognized Tax Benefits Reductions Resulting From Lapse Of Applicable Statute Of Limitations UnrecognizedTaxBenefitsReductionsResultingFromLapseOfApplicableStatuteOfLimitations	2699000	USD
CY2016Q4	us-gaap	Unrecognized Tax Benefits That Would Impact Effective Tax Rate UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate	5700000	USD
CY2017Q4	us-gaap	Unrecognized Tax Benefits That Would Impact Effective Tax Rate UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate	4800000	USD
CY2017Q4	us-gaap	Unrecorded Unconditional Purchase Obligation Balance Sheet Amount UnrecordedUnconditionalPurchaseObligationBalanceSheetAmount	89000000	USD
CY2014Q4	us-gaap	Valuation Allowances And Reserves Balance ValuationAllowancesAndReservesBalance	1262000	USD
CY2015Q4	us-gaap	Valuation Allowances And Reserves Balance ValuationAllowancesAndReservesBalance	1475000	USD
CY2016Q4	us-gaap	Valuation Allowances And Reserves Balance ValuationAllowancesAndReservesBalance	1475000	USD
CY2017Q4	us-gaap	Valuation Allowances And Reserves Balance ValuationAllowancesAndReservesBalance	1475000	USD
CY2015	us-gaap	Valuation Allowances And Reserves Charged To Cost And Expense ValuationAllowancesAndReservesChargedToCostAndExpense	318000	USD
CY2016	us-gaap	Valuation Allowances And Reserves Charged To Cost And Expense ValuationAllowancesAndReservesChargedToCostAndExpense	0	USD
CY2017	us-gaap	Valuation Allowances And Reserves Charged To Cost And Expense ValuationAllowancesAndReservesChargedToCostAndExpense	0	USD
CY2015	us-gaap	Valuation Allowances And Reserves Charged To Other Accounts ValuationAllowancesAndReservesChargedToOtherAccounts	0	USD
CY2016	us-gaap	Valuation Allowances And Reserves Charged To Other Accounts ValuationAllowancesAndReservesChargedToOtherAccounts	0	USD
CY2017	us-gaap	Valuation Allowances And Reserves Charged To Other Accounts ValuationAllowancesAndReservesChargedToOtherAccounts	0	USD
CY2015	us-gaap	Valuation Allowances And Reserves Deductions ValuationAllowancesAndReservesDeductions	105000	USD
CY2016	us-gaap	Valuation Allowances And Reserves Deductions ValuationAllowancesAndReservesDeductions	0	USD
CY2017	us-gaap	Valuation Allowances And Reserves Deductions ValuationAllowancesAndReservesDeductions	0	USD
CY2015	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	87109000	shares
CY2016	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	83365000	shares
CY2017	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	83336000	shares
CY2015	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	86974000	shares
CY2016	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	83297000	shares
CY2017	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	83298000	shares
CY2017	us-gaap	Advertising Cost Policy Expensed Advertising Cost AdvertisingCostPolicyExpensedAdvertisingCost	<div style="font-family:Times New Roman;font-size:10pt;"><div style="line-height:120%;text-align:justify;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-weight:bold;">Advertising Costs</font></div><div style="line-height:120%;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div><div style="line-height:120%;text-align:justify;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">We expense all advertising costs as incurred.  Advertising costs are included in other operating expenses in the consolidated statements of comprehensive income. Advertising expense was </font><font style="font-family:inherit;font-size:10pt;color:#000000;text-decoration:none;">$2.0 million</font><font style="font-family:inherit;font-size:10pt;">, </font><font style="font-family:inherit;font-size:10pt;">$2.1 million</font><font style="font-family:inherit;font-size:10pt;">, and </font><font style="font-family:inherit;font-size:10pt;">$3.1 million</font><font style="font-family:inherit;font-size:10pt;"> for the years ended </font><font style="font-family:inherit;font-size:10pt;color:#000000;text-decoration:none;">December 31, 2017</font><font style="font-family:inherit;font-size:10pt;">, </font><font style="font-family:inherit;font-size:10pt;">2016</font><font style="font-family:inherit;font-size:10pt;">, and </font><font style="font-family:inherit;font-size:10pt;">2015</font><font style="font-family:inherit;font-size:10pt;">, respectively.</font></div></div>
CY2017	us-gaap	Nature Of Operations NatureOfOperations	<div style="font-family:Times New Roman;font-size:10pt;"><div style="line-height:120%;text-align:left;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-weight:bold;">Nature of Business</font></div><div style="line-height:120%;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div><div style="line-height:120%;text-align:justify;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">Heartland Express, Inc. is a holding company incorporated in Nevada, which owns all of the stock of Heartland Express, Inc. of Iowa, Heartland Express Services, Inc., Heartland Express Maintenance Services, Inc., and A & M Express, Inc. For the period November 11, 2013 to July 1, 2016, the Company also operated Gordon Trucking, Inc. ("GTI"), which was merged into Heartland Express, Inc. of Iowa effective July 1, 2016. On July 6th, 2017, Heartland Express, Inc. of Iowa acquired Interstate Distributor Co. ("IDC"), which was subsequently merged into Heartland Express, Inc. of Iowa effective October 1, 2017. We, together with our subsidiaries, are a short-to-medium haul truckload carrier (predominately 500 miles or less per load). We primarily provide nationwide asset-based dry van truckload service for major shippers from Washington to Florida and New England to California.</font></div><div style="line-height:120%;text-align:justify;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div></div>
CY2017	us-gaap	Property Plant And Equipment Impairment PropertyPlantAndEquipmentImpairment	<div style="font-family:Times New Roman;font-size:10pt;"><div style="line-height:120%;text-align:justify;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-weight:bold;">Impairment of Long-Lived Assets</font></div><div style="line-height:120%;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div><div style="line-height:120%;text-align:justify;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">We periodically evaluate property and equipment and amortizable intangible assets for impairment upon the occurrence of events or changes in circumstances that indicate the carrying amount of assets may not be recoverable. Recoverability of assets to be held and used is evaluated by a comparison of the carrying amount of an asset group to future net undiscounted cash flows expected to be generated by the group. If such assets are considered to be impaired, the impairment to be recognized is measured by the amount over which the carrying amount of the assets exceeds the fair value of the assets.  There were </font><font style="font-family:inherit;font-size:10pt;">no</font><font style="font-family:inherit;font-size:10pt;"> impairment charges recognized during the years ended </font><font style="font-family:inherit;font-size:10pt;color:#000000;text-decoration:none;">December 31, 2017</font><font style="font-family:inherit;font-size:10pt;">, </font><font style="font-family:inherit;font-size:10pt;">2016</font><font style="font-family:inherit;font-size:10pt;">, and </font><font style="font-family:inherit;font-size:10pt;">2015</font><font style="font-family:inherit;font-size:10pt;">.</font></div></div>
CY2017	us-gaap	Use Of Estimates UseOfEstimates	<div style="font-family:Times New Roman;font-size:10pt;"><div style="line-height:120%;text-align:justify;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-weight:bold;">Use of Estimates</font></div><div style="line-height:120%;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;"><br clear="none"/></font></div><div style="line-height:120%;text-align:justify;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;">The preparation of the consolidated financial statements in conformity with U.S. generally accepted accounting principles (“GAAP”) requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period.  Actual results could differ from those estimates.</font></div></div>

Files In Submission

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0000799233-18-000007-index-headers.html	Edgar Link	pending
0000799233-18-000007-index.html	Edgar Link	pending
0000799233-18-000007.txt	Edgar Link	pending
0000799233-18-000007-xbrl.zip	Edgar Link	pending
a2017exhibitno21.htm	Edgar Link	pending
exhibit3112017q4.htm	Edgar Link	pending
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FilingSummary.xml	Edgar Link	unprocessable
Financial_Report.xlsx	Edgar Link	pending
htld-20171231.xml	Edgar Link	completed
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$HTLD
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2017 Q3 Form 10-K Financial Statement

#000079923318000007 Filed on March 01, 2018

Income Statement

Balance Sheet

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Facts In Submission

Files In Submission

$HTLD HEARTLAND EXPRESS INC Stock $htld

2017 Q3 Form 10-K Financial Statement

#000079923318000007 Filed on March 01, 2018

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$HTLD
HEARTLAND EXPRESS INC Stock $htld