$HTLD
HEARTLAND EXPRESS INC Stock $htld

$htld Overview Financials Valuation SEC Filings Company Website

2018 Q4 Form 10-K Financial Statement

#000079923319000006 Filed on February 21, 2019

Income Statement

Concept	2018 Q4	2017 Q4	2017 Q3
Revenue	$147.0M	$165.7M	$182.1M
YoY Change	-11.29%	18.32%	21.97%
Cost Of Revenue
YoY Change
Gross Profit
YoY Change
Gross Profit Margin
Selling, General & Admin	$97.50M	$127.3M	$139.8M
YoY Change	-23.41%	37.47%	35.99%
% of Gross Profit
Research & Development
YoY Change
% of Gross Profit
Depreciation & Amortization	$25.20M	$29.50M	$28.80M
YoY Change	-14.58%	10.07%	5.88%
% of Gross Profit
Operating Expenses	$127.0M	$162.6M	$176.6M
YoY Change	-21.89%	34.38%	34.91%
Operating Profit	$29.56M	$9.869M	$13.00M
YoY Change	199.52%	-52.78%	-34.72%
Interest Expense	$800.0K	$200.0K	$175.0K
YoY Change	300.0%	0.0%
% of Operating Profit	2.71%	2.03%	1.35%
Other Income/Expense, Net
YoY Change
Pretax Income	$30.34M	$10.05M	$13.06M
YoY Change	201.94%	-52.31%	-34.81%
Income Tax	$7.900M	$4.200M	$5.146M
% Of Pretax Income	26.04%	41.8%	39.4%
Net Earnings	$22.44M	$38.61M	$7.916M
YoY Change	-41.87%	194.38%	-36.81%
Net Earnings / Revenue	15.26%	23.3%	4.35%
Basic Earnings Per Share	$0.27	$0.45	$0.10
Diluted Earnings Per Share	$0.27	$0.45	$0.09
COMMON SHARES
Basic Shares Outstanding	81.93M shares	83.30M shares	83.30M shares
Diluted Shares Outstanding			83.33M shares

Balance Sheet

Concept	2018 Q4	2017 Q4	2017 Q3
SHORT-TERM ASSETS
Cash & Short-Term Investments	$161.4M	$75.40M	$51.30M
YoY Change	114.06%	-41.32%	-48.85%
Cash & Equivalents	$161.4M	$75.38M	$51.29M
Short-Term Investments
Other Short-Term Assets	$12.55M	$13.78M	$2.426M
YoY Change	-8.93%	-0.43%	-74.18%
Inventory
Prepaid Expenses
Receivables	$48.96M	$64.29M	$70.76M
Other Receivables	$100.0K	$6.400M	$7.500M
Total Short-Term Assets	$232.5M	$170.8M	$171.7M
YoY Change	36.1%	-15.47%	-2.8%
LONG-TERM ASSETS
Property, Plant & Equipment	$403.1M	$442.9M	$71.96M
YoY Change	-8.97%	8.64%	-83.52%
Goodwill	$132.4M	$132.4M	$0.00
YoY Change	0.0%	32.13%	-100.0%
Intangibles	$14.49M	$17.02M	$15.03M
YoY Change	-14.85%	40.79%	19.57%
Long-Term Investments
YoY Change
Other Assets	$19.15M	$24.26M	$1.244M
YoY Change	-21.06%	95.94%	-89.04%
Total Long-Term Assets	$573.7M	$618.3M	-$14.64M
YoY Change	-7.21%	15.33%	-102.59%
TOTAL ASSETS
Total Short-Term Assets	$232.5M	$170.8M	$171.7M
Total Long-Term Assets	$573.7M	$618.3M	-$14.64M
Total Assets	$806.2M	$789.1M	$157.1M
YoY Change	2.17%	6.89%	-78.82%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$10.60M	$14.40M	$26.40M
YoY Change	-26.39%	16.13%	57.14%
Accrued Expenses	$54.10M	$61.00M	$66.00M
YoY Change	-11.31%	14.66%	10.0%
Deferred Revenue
YoY Change
Short-Term Debt	$0.00	$0.00	$0.00
YoY Change
Long-Term Debt Due	$0.00
YoY Change
Total Short-Term Liabilities	$64.69M	$75.32M	$92.39M
YoY Change	-14.12%	14.93%	20.39%
LONG-TERM LIABILITIES
Long-Term Debt	$0.00	$0.00	$0.00
YoY Change
Other Long-Term Liabilities	$54.50M	$73.70M	$72.10M
YoY Change	-26.05%		1702.5%
Total Long-Term Liabilities	$125.6M	$139.2M	$167.8M
YoY Change	-9.78%	-16.6%	-1.72%
TOTAL LIABILITIES
Total Short-Term Liabilities	$64.69M	$75.32M	$92.39M
Total Long-Term Liabilities	$125.6M	$139.2M	$167.8M
Total Liabilities	$190.2M	$214.5M	$260.2M
YoY Change	-11.3%	-7.71%	5.14%
SHAREHOLDERS EQUITY
Retained Earnings	$760.3M	$694.2M	$657.2M
YoY Change	9.52%	10.95%	7.0%
Common Stock	$4.361M	$4.425M	$4.254M
YoY Change	-1.45%	1.96%	0.57%
Preferred Stock
YoY Change
Treasury Stock (at cost)	$148.7M	$124.0M	$124.0M
YoY Change	19.92%	-0.18%	-0.19%
Treasury Stock Shares	8.759M shares	7.386M shares	7.386M shares
Shareholders Equity	$616.0M	$574.6M	$537.5M
YoY Change
Total Liabilities & Shareholders Equity	$806.2M	$789.1M	$797.7M
YoY Change	2.17%	6.89%	7.55%

Cashflow Statement

Concept	2018 Q4	2017 Q4	2017 Q3
OPERATING ACTIVITIES
Net Income	$22.44M	$38.61M	$7.916M
YoY Change	-41.87%	194.38%	-36.81%
Depreciation, Depletion And Amortization	$25.20M	$29.50M	$28.80M
YoY Change	-14.58%	10.07%	5.88%
Cash From Operating Activities	$37.90M	$32.30M	$26.40M
YoY Change	17.34%	-9.27%	-37.59%
INVESTING ACTIVITIES
Capital Expenditures	-$41.80M	-$79.20M	-$54.70M
YoY Change	-47.22%	391.93%	98.19%
Acquisitions			$86.73M
YoY Change
Other Investing Activities	$46.00M	$70.90M	-$55.90M
YoY Change	-35.12%	240.87%	-676.29%
Cash From Investing Activities	$4.300M	-$8.400M	-$110.5M
YoY Change	-151.19%	-278.72%	513.89%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net
YoY Change
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	-1.700M	-1.700M	-25.00M
YoY Change	0.0%	6.25%	1370.59%
NET CHANGE
Cash From Operating Activities	37.90M	32.30M	26.40M
Cash From Investing Activities	4.300M	-8.400M	-110.5M
Cash From Financing Activities	-1.700M	-1.700M	-25.00M
Net Change In Cash	40.50M	22.20M	-109.1M
YoY Change	82.43%	-42.64%	-582.74%
FREE CASH FLOW
Cash From Operating Activities	$37.90M	$32.30M	$26.40M
Capital Expenditures	-$41.80M	-$79.20M	-$54.70M
Free Cash Flow	$79.70M	$111.5M	$81.10M
YoY Change	-28.52%	115.67%	16.02%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
CY2018	dei	Entity Filer Category EntityFilerCategory	Large Accelerated Filer
CY2018	dei	Entity Registrant Name EntityRegistrantName	HEARTLAND EXPRESS INC
CY2018	dei	Entity Central Index Key EntityCentralIndexKey	0000799233
CY2018	dei	Document Type DocumentType	10-K
CY2018	dei	Document Period End Date DocumentPeriodEndDate	2018-12-31
CY2018	dei	Amendment Flag AmendmentFlag	false
CY2018	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2018
CY2018	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	FY
CY2018	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
CY2018	dei	Entity Small Business EntitySmallBusiness	false
CY2018	dei	Entity Emerging Growth Company EntityEmergingGrowthCompany	false
CY2019Q1	dei	Entity Common Stock Shares Outstanding EntityCommonStockSharesOutstanding	81934350	shares
CY2018	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
CY2018	dei	Entity Voluntary Filers EntityVoluntaryFilers	No
CY2018	dei	Entity Well Known Seasoned Issuer EntityWellKnownSeasonedIssuer	Yes
CY2018	dei	Entity Shell Company EntityShellCompany	false
CY2018Q4	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
CY2018Q4	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	5000000	shares
CY2017Q4	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	5000000	shares
CY2018Q4	us-gaap	Preferred Stock Shares Issued PreferredStockSharesIssued	0	shares
CY2017Q4	us-gaap	Preferred Stock Shares Issued PreferredStockSharesIssued	0	shares
CY2018Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.01
CY2017Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.01
CY2018Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	395000000	shares
CY2017Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	395000000	shares
CY2018Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	90689000	shares
CY2017Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	90689000	shares
CY2018Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	81930000	shares
CY2017Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	83303000	shares
CY2018Q4	us-gaap	Treasury Stock Shares TreasuryStockShares	8759000	shares
CY2017Q4	us-gaap	Treasury Stock Shares TreasuryStockShares	7386000	shares
CY2018	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.08
CY2018Q4	us-gaap	Other Assets Current OtherAssetsCurrent	12551000	USD
CY2017Q4	us-gaap	Other Assets Current OtherAssetsCurrent	13782000	USD
CY2018Q2	dei	Entity Public Float EntityPublicFloat	900000000	USD
CY2017	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.08
CY2016	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.08
CY2017	us-gaap	Asset Impairment Charges AssetImpairmentCharges		USD
CY2016	us-gaap	Asset Impairment Charges AssetImpairmentCharges		USD
CY2016	us-gaap	Impairment Of Intangible Assets Excluding Goodwill ImpairmentOfIntangibleAssetsExcludingGoodwill		USD
CY2017	us-gaap	Goodwill Impairment Loss GoodwillImpairmentLoss		USD
CY2016	us-gaap	Goodwill Impairment Loss GoodwillImpairmentLoss		USD
CY2017Q4	us-gaap	Line Of Credit LineOfCredit	0	USD
CY2019Q1	dei	Entity Common Stock Shares Outstanding EntityCommonStockSharesOutstanding	81934350	shares
CY2019Q1	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Nonvested Number ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber	20500	shares
CY2018Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	161448000	USD
CY2017Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	75378000	USD
CY2018Q4	us-gaap	Accounts Receivable Net Current AccountsReceivableNetCurrent	48955000	USD
CY2017Q4	us-gaap	Accounts Receivable Net Current AccountsReceivableNetCurrent	64293000	USD
CY2018Q4	us-gaap	Other Prepaid Expense Current OtherPrepaidExpenseCurrent	9378000	USD
CY2017Q4	us-gaap	Other Prepaid Expense Current OtherPrepaidExpenseCurrent	10989000	USD
CY2017Q4	us-gaap	Buildings And Improvements Gross BuildingsAndImprovementsGross	48657000	USD
CY2018Q4	us-gaap	Leasehold Improvements Gross LeaseholdImprovementsGross	437000	USD
CY2017Q4	us-gaap	Leasehold Improvements Gross LeaseholdImprovementsGross	2208000	USD
CY2018Q4	us-gaap	Furniture And Fixtures Gross FurnitureAndFixturesGross	3057000	USD
CY2018Q4	us-gaap	Income Taxes Receivable IncomeTaxesReceivable	170000	USD
CY2017Q4	us-gaap	Income Taxes Receivable IncomeTaxesReceivable	6393000	USD
CY2018Q4	us-gaap	Assets Current AssetsCurrent	232502000	USD
CY2017Q4	us-gaap	Assets Current AssetsCurrent	170835000	USD
CY2018Q4	us-gaap	Land And Land Improvements LandAndLandImprovements	46095000	USD
CY2017Q4	us-gaap	Land And Land Improvements LandAndLandImprovements	40283000	USD
CY2018Q4	us-gaap	Buildings And Improvements Gross BuildingsAndImprovementsGross	57505000	USD
CY2017Q4	us-gaap	Furniture And Fixtures Gross FurnitureAndFixturesGross	3437000	USD
CY2018Q4	us-gaap	Machinery And Equipment Gross MachineryAndEquipmentGross	10968000	USD
CY2017Q4	us-gaap	Machinery And Equipment Gross MachineryAndEquipmentGross	12202000	USD
CY2018Q4	htld	Revenue Equipment RevenueEquipment	479068000	USD
CY2017Q4	htld	Revenue Equipment RevenueEquipment	555980000	USD
CY2018Q4	us-gaap	Construction In Progress Gross ConstructionInProgressGross	6540000	USD
CY2017Q4	us-gaap	Construction In Progress Gross ConstructionInProgressGross	3996000	USD
CY2018Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	603670000	USD
CY2017Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	666763000	USD
CY2018Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	200550000	USD
CY2017Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	223901000	USD
CY2018Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	403120000	USD
CY2017Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	442862000	USD
CY2018Q4	us-gaap	Goodwill Goodwill	132410000	USD
CY2017Q4	us-gaap	Goodwill Goodwill	132410000	USD
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CY2017Q4	us-gaap	Intangible Assets Net Excluding Goodwill IntangibleAssetsNetExcludingGoodwill	17022000	USD
CY2018Q4	us-gaap	Deferred Income Tax Assets Net DeferredIncomeTaxAssetsNet	4535000	USD
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CY2017Q4	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	24261000	USD
CY2018Q4	us-gaap	Assets Assets	806213000	USD
CY2017Q4	us-gaap	Assets Assets	789127000	USD
CY2018Q4	us-gaap	Accounts Payable And Accrued Liabilities Current AccountsPayableAndAccruedLiabilitiesCurrent	10552000	USD
CY2017Q4	us-gaap	Accounts Payable And Accrued Liabilities Current AccountsPayableAndAccruedLiabilitiesCurrent	14366000	USD
CY2018Q4	us-gaap	Employee Related Liabilities Current EmployeeRelatedLiabilitiesCurrent	22558000	USD
CY2017Q4	us-gaap	Employee Related Liabilities Current EmployeeRelatedLiabilitiesCurrent	26752000	USD
CY2018Q4	us-gaap	Self Insurance Reserve Current SelfInsuranceReserveCurrent	22130000	USD
CY2017Q4	us-gaap	Self Insurance Reserve Current SelfInsuranceReserveCurrent	21368000	USD
CY2018Q4	us-gaap	Other Accrued Liabilities Current OtherAccruedLiabilitiesCurrent	9449000	USD
CY2017Q4	us-gaap	Other Accrued Liabilities Current OtherAccruedLiabilitiesCurrent	12835000	USD
CY2018Q4	us-gaap	Liabilities Current LiabilitiesCurrent	64689000	USD
CY2017Q4	us-gaap	Liabilities Current LiabilitiesCurrent	75321000	USD
CY2018Q4	us-gaap	Accrued Income Taxes Noncurrent AccruedIncomeTaxesNoncurrent	5577000	USD
CY2017Q4	us-gaap	Accrued Income Taxes Noncurrent AccruedIncomeTaxesNoncurrent	8147000	USD
CY2018Q4	us-gaap	Deferred Tax Liabilities Noncurrent DeferredTaxLiabilitiesNoncurrent	71041000	USD
CY2017Q4	us-gaap	Deferred Tax Liabilities Noncurrent DeferredTaxLiabilitiesNoncurrent	65488000	USD
CY2018Q4	us-gaap	Self Insurance Reserve Noncurrent SelfInsuranceReserveNoncurrent	48934000	USD
CY2017Q4	us-gaap	Self Insurance Reserve Noncurrent SelfInsuranceReserveNoncurrent	65526000	USD
CY2018Q4	us-gaap	Liabilities Noncurrent LiabilitiesNoncurrent	125552000	USD
CY2017Q4	us-gaap	Liabilities Noncurrent LiabilitiesNoncurrent	139161000	USD
CY2018Q4	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		USD
CY2017Q4	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		USD
CY2018Q4	us-gaap	Preferred Stock Value PreferredStockValue	0	USD
CY2017Q4	us-gaap	Preferred Stock Value PreferredStockValue	0	USD
CY2018Q4	us-gaap	Common Stock Value CommonStockValue	907000	USD
CY2017Q4	us-gaap	Common Stock Value CommonStockValue	907000	USD
CY2018Q4	us-gaap	Additional Paid In Capital Common Stock AdditionalPaidInCapitalCommonStock	3454000	USD
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CY2018Q4	us-gaap	Treasury Stock Value TreasuryStockValue	148651000	USD
CY2017Q4	us-gaap	Treasury Stock Value TreasuryStockValue	123954000	USD
CY2018Q4	us-gaap	Stockholders Equity StockholdersEquity	615972000	USD
CY2017Q4	us-gaap	Stockholders Equity StockholdersEquity	574645000	USD
CY2018Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	806213000	USD
CY2017Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	789127000	USD
CY2018	us-gaap	Revenues Revenues	610803000	USD
CY2017	us-gaap	Revenues Revenues	607336000	USD
CY2016	us-gaap	Revenues Revenues	612937000	USD
CY2018	us-gaap	Labor And Related Expense LaborAndRelatedExpense	227872000	USD
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CY2016	us-gaap	Labor And Related Expense LaborAndRelatedExpense	231980000	USD
CY2018	htld	Rent And Purchased Transportation RentAndPurchasedTransportation	18700000	USD
CY2017	htld	Rent And Purchased Transportation RentAndPurchasedTransportation	30002000	USD
CY2016	htld	Rent And Purchased Transportation RentAndPurchasedTransportation	23485000	USD
CY2018	us-gaap	Fuel Costs FuelCosts	110536000	USD
CY2017	us-gaap	Fuel Costs FuelCosts	104381000	USD
CY2016	us-gaap	Fuel Costs FuelCosts	91494000	USD
CY2018	us-gaap	Cost Maintenance CostMaintenance	27143000	USD
CY2017	us-gaap	Cost Maintenance CostMaintenance	29609000	USD
CY2016	us-gaap	Cost Maintenance CostMaintenance	26159000	USD
CY2018	us-gaap	Direct Taxes And Licenses Costs DirectTaxesAndLicensesCosts	16390000	USD
CY2017	us-gaap	Direct Taxes And Licenses Costs DirectTaxesAndLicensesCosts	16615000	USD
CY2017	us-gaap	Direct Taxes And Licenses Costs DirectTaxesAndLicensesCosts	16615000	USD
CY2016	us-gaap	Direct Taxes And Licenses Costs DirectTaxesAndLicensesCosts	15559000	USD
CY2018	us-gaap	Operating Insurance And Claims Costs Production OperatingInsuranceAndClaimsCostsProduction	17227000	USD
CY2017	us-gaap	Operating Insurance And Claims Costs Production OperatingInsuranceAndClaimsCostsProduction	18850000	USD
CY2016	us-gaap	Operating Insurance And Claims Costs Production OperatingInsuranceAndClaimsCostsProduction	24449000	USD
CY2018	us-gaap	Direct Communications And Utilities Costs DirectCommunicationsAndUtilitiesCosts	6086000	USD
CY2017	us-gaap	Direct Communications And Utilities Costs DirectCommunicationsAndUtilitiesCosts	5781000	USD
CY2016	us-gaap	Direct Communications And Utilities Costs DirectCommunicationsAndUtilitiesCosts	4485000	USD
CY2018	htld	Depreciationandamortizationexcludingdepreciationoncommunicationequipment Depreciationandamortizationexcludingdepreciationoncommunicationequipment	100519000	USD
CY2017	htld	Depreciationandamortizationexcludingdepreciationoncommunicationequipment Depreciationandamortizationexcludingdepreciationoncommunicationequipment	103690000	USD
CY2016	htld	Depreciationandamortizationexcludingdepreciationoncommunicationequipment Depreciationandamortizationexcludingdepreciationoncommunicationequipment	105578000	USD
CY2018	us-gaap	Other Cost And Expense Operating OtherCostAndExpenseOperating	21506000	USD
CY2017	us-gaap	Other Cost And Expense Operating OtherCostAndExpenseOperating	24666000	USD
CY2016	us-gaap	Other Cost And Expense Operating OtherCostAndExpenseOperating	13385000	USD
CY2018	us-gaap	Gain Loss On Disposition Of Assets GainLossOnDispositionOfAssets	24963000	USD
CY2017	us-gaap	Gain Loss On Disposition Of Assets GainLossOnDispositionOfAssets	26674000	USD
CY2016	us-gaap	Gain Loss On Disposition Of Assets GainLossOnDispositionOfAssets	9205000	USD
CY2018	us-gaap	Costs And Expenses CostsAndExpenses	521016000	USD
CY2017	us-gaap	Costs And Expenses CostsAndExpenses	543792000	USD
CY2016	us-gaap	Costs And Expenses CostsAndExpenses	527369000	USD
CY2018	us-gaap	Operating Income Loss OperatingIncomeLoss	89787000	USD
CY2017	us-gaap	Operating Income Loss OperatingIncomeLoss	63544000	USD
CY2016	us-gaap	Operating Income Loss OperatingIncomeLoss	85568000	USD
CY2018	us-gaap	Investment Income Interest InvestmentIncomeInterest	2130000	USD
CY2017	us-gaap	Investment Income Interest InvestmentIncomeInterest	1129000	USD
CY2016	us-gaap	Investment Income Interest InvestmentIncomeInterest	481000	USD
CY2018	us-gaap	Interest Expense Debt InterestExpenseDebt	0	USD
CY2017	us-gaap	Interest Expense Debt InterestExpenseDebt	175000	USD
CY2016	us-gaap	Interest Expense Debt InterestExpenseDebt	0	USD
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CY2017	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	64498000	USD
CY2016	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	86049000	USD
CY2018	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	19240000	USD
CY2017	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-10675000	USD
CY2016	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	29663000	USD
CY2018	us-gaap	Net Income Loss NetIncomeLoss	72677000	USD
CY2017	us-gaap	Net Income Loss NetIncomeLoss	75173000	USD
CY2016	us-gaap	Net Income Loss NetIncomeLoss	56386000	USD
CY2018	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
CY2016	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	0	USD
CY2018	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	72677000	USD
CY2017	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	75173000	USD
CY2016	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	56386000	USD
CY2018	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.88
CY2017	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.90
CY2016	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.68
CY2018	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.88
CY2017	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.90
CY2017	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.90
CY2016	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.68
CY2018	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	82378000	shares
CY2017	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	83298000	shares
CY2016	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	83297000	shares
CY2018	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	82410000	shares
CY2017	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	83336000	shares
CY2016	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	83365000	shares
CY2018	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.08
CY2017	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.08
CY2016	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.08
CY2017	us-gaap	Dividends Common Stock DividendsCommonStock	6667000	USD
CY2017	us-gaap	Stock Issued During Period Value Share Based Compensation StockIssuedDuringPeriodValueShareBasedCompensation	313000	USD
CY2015Q4	us-gaap	Stockholders Equity StockholdersEquity	469928000	USD
CY2016	us-gaap	Net Income Loss NetIncomeLoss	56386000	USD
CY2016	us-gaap	Dividends Common Stock DividendsCommonStock	6666000	USD
CY2016	us-gaap	Stock Repurchased During Period Value StockRepurchasedDuringPeriodValue	14678000	USD
CY2016	us-gaap	Stock Issued During Period Value Share Based Compensation StockIssuedDuringPeriodValueShareBasedCompensation	856000	USD
CY2016Q4	us-gaap	Stockholders Equity StockholdersEquity	505826000	USD
CY2017	us-gaap	Net Income Loss NetIncomeLoss	75173000	USD
CY2017Q4	us-gaap	Stockholders Equity StockholdersEquity	574645000	USD
CY2018	us-gaap	Net Income Loss NetIncomeLoss	72677000	USD
CY2018	us-gaap	Dividends Common Stock DividendsCommonStock	6589000	USD
CY2018	us-gaap	Stock Repurchased During Period Value StockRepurchasedDuringPeriodValue	25087000	USD
CY2018	us-gaap	Stock Issued During Period Value Share Based Compensation StockIssuedDuringPeriodValueShareBasedCompensation	326000	USD
CY2018Q4	us-gaap	Stockholders Equity StockholdersEquity	615972000	USD
CY2018	us-gaap	Net Income Loss NetIncomeLoss	72677000	USD
CY2017	us-gaap	Net Income Loss NetIncomeLoss	75173000	USD
CY2016	us-gaap	Net Income Loss NetIncomeLoss	56386000	USD
CY2018	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	101329000	USD
CY2017	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	103905000	USD
CY2016	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	105580000	USD
CY2018	us-gaap	Increase Decrease In Deferred Income Taxes IncreaseDecreaseInDeferredIncomeTaxes	-2755000	USD
CY2017	us-gaap	Increase Decrease In Deferred Income Taxes IncreaseDecreaseInDeferredIncomeTaxes	27121000	USD
CY2016	us-gaap	Increase Decrease In Deferred Income Taxes IncreaseDecreaseInDeferredIncomeTaxes	4584000	USD
CY2018	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	539000	USD
CY2017	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	511000	USD
CY2016	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	0	USD
CY2018	us-gaap	Allocated Share Based Compensation Expense Net Of Tax AllocatedShareBasedCompensationExpenseNetOfTax	0	USD
CY2017	us-gaap	Allocated Share Based Compensation Expense Net Of Tax AllocatedShareBasedCompensationExpenseNetOfTax	0	USD
CY2016	us-gaap	Allocated Share Based Compensation Expense Net Of Tax AllocatedShareBasedCompensationExpenseNetOfTax	856000	USD
CY2018	us-gaap	Gain Loss On Disposition Of Assets GainLossOnDispositionOfAssets	24963000	USD
CY2017	us-gaap	Gain Loss On Disposition Of Assets GainLossOnDispositionOfAssets	26674000	USD
CY2016	us-gaap	Gain Loss On Disposition Of Assets GainLossOnDispositionOfAssets	9205000	USD
CY2018	us-gaap	Increase Decrease In Receivables IncreaseDecreaseInReceivables	-15338000	USD
CY2017	us-gaap	Increase Decrease In Receivables IncreaseDecreaseInReceivables	-15239000	USD
CY2016	us-gaap	Increase Decrease In Receivables IncreaseDecreaseInReceivables	-14165000	USD
CY2018	us-gaap	Increase Decrease In Prepaid Deferred Expense And Other Assets IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets	-1227000	USD
CY2017	us-gaap	Increase Decrease In Prepaid Deferred Expense And Other Assets IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets	-860000	USD
CY2016	us-gaap	Increase Decrease In Prepaid Deferred Expense And Other Assets IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets	-5017000	USD
CY2018	us-gaap	Increase Decrease In Accounts Payable And Accrued Liabilities IncreaseDecreaseInAccountsPayableAndAccruedLiabilities	-26012000	USD
CY2017	us-gaap	Increase Decrease In Accounts Payable And Accrued Liabilities IncreaseDecreaseInAccountsPayableAndAccruedLiabilities	-26893000	USD
CY2016	us-gaap	Increase Decrease In Accounts Payable And Accrued Liabilities IncreaseDecreaseInAccountsPayableAndAccruedLiabilities	-11063000	USD
CY2018	us-gaap	Increase Decrease In Accrued Income Taxes Payable IncreaseDecreaseInAccruedIncomeTaxesPayable	3653000	USD
CY2017	us-gaap	Increase Decrease In Accrued Income Taxes Payable IncreaseDecreaseInAccruedIncomeTaxesPayable	-5462000	USD
CY2016	us-gaap	Increase Decrease In Accrued Income Taxes Payable IncreaseDecreaseInAccruedIncomeTaxesPayable	-1371000	USD
CY2018	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	146543000	USD
CY2017	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	109538000	USD
CY2016	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	155781000	USD
CY2018	us-gaap	Proceeds From Sale Of Property Plant And Equipment ProceedsFromSaleOfPropertyPlantAndEquipment	130752000	USD
CY2017	us-gaap	Proceeds From Sale Of Property Plant And Equipment ProceedsFromSaleOfPropertyPlantAndEquipment	147578000	USD
CY2016	us-gaap	Proceeds From Sale Of Property Plant And Equipment ProceedsFromSaleOfPropertyPlantAndEquipment	57280000	USD
CY2018	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	169276000	USD
CY2017	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	184114000	USD
CY2016	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	86088000	USD
CY2018	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
CY2016	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	0	USD
CY2018	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	-710000	USD
CY2017	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	233000	USD
CY2016	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	0	USD
CY2018	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-37814000	USD
CY2017	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-123497000	USD
CY2016	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-28808000	USD
CY2018	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	6589000	USD
CY2017	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	6667000	USD
CY2016	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	6666000	USD
CY2018	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	213000	USD
CY2017	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	198000	USD
CY2016	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	0	USD
CY2018	us-gaap	Repayments Of Lines Of Credit RepaymentsOfLinesOfCredit	0	USD
CY2017	us-gaap	Repayments Of Lines Of Credit RepaymentsOfLinesOfCredit	23303000	USD
CY2016	us-gaap	Repayments Of Lines Of Credit RepaymentsOfLinesOfCredit	0	USD
CY2018	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	25087000	USD
CY2017	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	0	USD
CY2016	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	14678000	USD
CY2018	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-31889000	USD
CY2017	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-30168000	USD
CY2016	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-21344000	USD
CY2018	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	76840000	USD
CY2017	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	-44127000	USD
CY2016	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	105629000	USD
CY2017Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	106098000	USD
CY2016Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	150225000	USD
CY2015Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	44596000	USD
CY2018Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	182938000	USD
CY2018Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	182938000	USD
CY2018Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	182938000	USD
CY2018Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	182938000	USD
CY2017Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	106098000	USD
CY2017Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	106098000	USD
CY2017Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	106098000	USD
CY2016Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	150225000	USD
CY2018	us-gaap	Interest Paid InterestPaid	0	USD
CY2017	us-gaap	Interest Paid InterestPaid	153000	USD
CY2016	us-gaap	Interest Paid InterestPaid	0	USD
CY2018	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	12832000	USD
CY2017	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	21909000	USD
CY2016	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	35537000	USD
CY2017Q4	us-gaap	Restricted Cash And Cash Equivalents RestrictedCashAndCashEquivalents	30700000	USD
CY2017Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	106098000	USD
CY2016Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	150225000	USD
CY2018	us-gaap	Nature Of Operations NatureOfOperations	<div><span style="background-color:rgb(255,255,255, 0.0);color:#000000;font-family:Times New Roman;font-size:10pt;font-weight:700;line-height:120%;">Nature of Business</span></div><div><span><br/></span></div><div style="text-align:justify;"><span style="background-color:rgb(255,255,255, 0.0);color:#000000;font-family:Times New Roman;font-size:10pt;line-height:120%;">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 6, 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. Further, effective December 31, 2018, A & M Express, Inc. was merged into Heartland Express, Inc. of Iowa. 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.</span></div>
CY2018	us-gaap	Capital Expenditures Incurred But Not Yet Paid CapitalExpendituresIncurredButNotYetPaid	1944000	USD
CY2017	us-gaap	Capital Expenditures Incurred But Not Yet Paid CapitalExpendituresIncurredButNotYetPaid	3387000	USD
CY2016	us-gaap	Capital Expenditures Incurred But Not Yet Paid CapitalExpendituresIncurredButNotYetPaid	63000	USD
CY2018	htld	Soldrevenueequipmentinothercurrentassets Soldrevenueequipmentinothercurrentassets	3783000	USD
CY2017	htld	Soldrevenueequipmentinothercurrentassets Soldrevenueequipmentinothercurrentassets	869000	USD
CY2016	htld	Soldrevenueequipmentinothercurrentassets Soldrevenueequipmentinothercurrentassets	160000	USD
CY2018Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	161448000	USD
CY2017Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	75378000	USD
CY2016Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	128507000	USD
CY2018Q4	us-gaap	Restricted Cash And Investments Current RestrictedCashAndInvestmentsCurrent	3105000	USD
CY2017Q4	us-gaap	Restricted Cash And Investments Current RestrictedCashAndInvestmentsCurrent	7936000	USD
CY2016Q4	us-gaap	Restricted Cash And Investments Current RestrictedCashAndInvestmentsCurrent	9335000	USD
CY2018Q4	us-gaap	Restricted Cash And Investments Noncurrent RestrictedCashAndInvestmentsNoncurrent	18385000	USD
CY2017Q4	us-gaap	Restricted Cash And Investments Noncurrent RestrictedCashAndInvestmentsNoncurrent	22784000	USD
CY2016Q4	us-gaap	Restricted Cash And Investments Noncurrent RestrictedCashAndInvestmentsNoncurrent	12383000	USD
CY2018Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	182938000	USD
CY2018	us-gaap	Use Of Estimates UseOfEstimates	<div style="text-align:justify;"><span style="background-color:rgb(255,255,255, 0.0);color:#000000;font-family:Times New Roman;font-size:10pt;font-weight:700;line-height:120%;">Use of Estimates</span></div><div><span><br/></span></div><div style="text-align:justify;"><span style="background-color:rgb(255,255,255, 0.0);color:#000000;font-family:Times New Roman;font-size:10pt;line-height:120%;">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.</span></div>
CY2018	us-gaap	Number Of Reportable Segments NumberOfReportableSegments	1	segments
CY2018Q4	us-gaap	Restricted Cash And Cash Equivalents RestrictedCashAndCashEquivalents	21500000	USD
CY2018Q4	us-gaap	Restricted Cash And Cash Equivalents At Carrying Value RestrictedCashAndCashEquivalentsAtCarryingValue	3100000	USD
CY2018Q4	us-gaap	Restricted Cash And Cash Equivalents Noncurrent RestrictedCashAndCashEquivalentsNoncurrent	18400000	USD
CY2017Q4	us-gaap	Restricted Cash And Cash Equivalents At Carrying Value RestrictedCashAndCashEquivalentsAtCarryingValue	7900000	USD
CY2017Q4	us-gaap	Restricted Cash And Cash Equivalents Noncurrent RestrictedCashAndCashEquivalentsNoncurrent	22800000	USD
CY2018Q4	us-gaap	Held To Maturity Securities HeldToMaturitySecurities	1500000	USD
CY2017Q4	us-gaap	Held To Maturity Securities HeldToMaturitySecurities	1400000	USD
CY2018Q4	htld	Customer Credit Terms Days CustomerCreditTermsDays	30	D
CY2018Q4	us-gaap	Allowance For Doubtful Accounts Receivable Current AllowanceForDoubtfulAccountsReceivableCurrent	900000	USD
CY2017Q4	us-gaap	Allowance For Doubtful Accounts Receivable Current AllowanceForDoubtfulAccountsReceivableCurrent	1500000	USD
CY2018	htld	Amortization Period Of Tires AmortizationPeriodOfTires	two years
CY2018	us-gaap	Property Plant And Equipment Impairment PropertyPlantAndEquipmentImpairment	<div style="text-align:justify;"><span style="background-color:rgb(255,255,255, 0.0);color:#000000;font-family:Times New Roman;font-size:10pt;font-weight:700;line-height:120%;">Impairment of Long-Lived Assets</span></div><div><span><br/></span></div><div style="text-align:justify;"><span style="background-color:rgb(255,255,255, 0.0);color:#000000;font-family:Times New Roman;font-size:10pt;line-height:120%;">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 no impairment charges recognized during the years ended December 31, 2018, 2017, and 2016.</span></div>
CY2018	us-gaap	Asset Impairment Charges AssetImpairmentCharges	0	USD
CY2018	us-gaap	Advertising Cost Policy Expensed Advertising Cost AdvertisingCostPolicyExpensedAdvertisingCost	<div style="text-align:justify;"><span style="background-color:rgb(255,255,255, 0.0);color:#000000;font-family:Times New Roman;font-size:10pt;font-weight:700;line-height:120%;">Advertising Costs</span></div><div><span><br/></span></div><div style="text-align:justify;"><span style="background-color:rgb(255,255,255, 0.0);color:#000000;font-family:Times New Roman;font-size:10pt;line-height:120%;">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 $1.8 million, $2.0 million, and $2.1 million for the years ended December 31, 2018, 2017, and 2016, respectively.</span></div>
CY2018	us-gaap	Advertising Expense AdvertisingExpense	1800000	USD
CY2017	us-gaap	Advertising Expense AdvertisingExpense	2000000.0	USD
CY2016	us-gaap	Advertising Expense AdvertisingExpense	2100000	USD
CY2018	us-gaap	Goodwill Impairment Loss GoodwillImpairmentLoss	0	USD
CY2018	us-gaap	Impairment Of Intangible Assets Excluding Goodwill ImpairmentOfIntangibleAssetsExcludingGoodwill	0	USD
CY2018Q4	htld	Health Insurance Reserves HealthInsuranceReserves	4900000	USD
CY2017Q4	htld	Health Insurance Reserves HealthInsuranceReserves	7000000.0	USD
CY2018Q4	us-gaap	Contract With Customer Asset Net ContractWithCustomerAssetNet	1100000	USD
CY2018	us-gaap	Net Income Loss NetIncomeLoss	72677000	USD
CY2018	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	82378000	shares
CY2018	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.88
CY2018	us-gaap	Amount Of Dilutive Securities Stock Options And Restrictive Stock Units AmountOfDilutiveSecuritiesStockOptionsAndRestrictiveStockUnits	0	USD
CY2018	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	32000	shares
CY2018	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	72677000	USD
CY2018	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	82410000	shares
CY2018	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.88
CY2017	us-gaap	Net Income Loss NetIncomeLoss	75173000	USD
CY2017	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	83298000	shares
CY2017	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.90
CY2017	us-gaap	Amount Of Dilutive Securities Stock Options And Restrictive Stock Units AmountOfDilutiveSecuritiesStockOptionsAndRestrictiveStockUnits	0	USD
CY2017	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	38000	shares
CY2017	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	75173000	USD
CY2017	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	83336000	shares
CY2017	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.90
CY2016	us-gaap	Net Income Loss NetIncomeLoss	56386000	USD
CY2016	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	83297000	shares
CY2016	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.68
CY2016	us-gaap	Amount Of Dilutive Securities Stock Options And Restrictive Stock Units AmountOfDilutiveSecuritiesStockOptionsAndRestrictiveStockUnits	0	USD
CY2016	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	68000	shares
CY2016	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	56386000	USD
CY2016	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	83365000	shares
CY2016	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.68
CY2018	htld	Portionoftaxbenefitrecordedpositionsmorelikelythannottobesustained Portionoftaxbenefitrecordedpositionsmorelikelythannottobesustained	0.50
CY2018	htld	Concentration Of Risk Number Of Customers ConcentrationOfRiskNumberOfCustomers	5	Customer
CY2018	us-gaap	Concentration Risk Percentage1 ConcentrationRiskPercentage1	0.37
CY2017	us-gaap	Concentration Risk Percentage1 ConcentrationRiskPercentage1	0.38
CY2016	us-gaap	Concentration Risk Percentage1 ConcentrationRiskPercentage1	0.40
CY2018	htld	Concentration Of Risk Number Of Customers ConcentrationOfRiskNumberOfCustomers	5	Customer
CY2018Q4	us-gaap	Contract With Customer Asset Net ContractWithCustomerAssetNet	1100000	USD
CY2018	us-gaap	Revenues Revenues	610800000	USD
CY2017	us-gaap	Revenues Revenues	607300000	USD
CY2016	us-gaap	Revenues Revenues	612900000	USD
CY2018	htld	Fuel Surcharge Revenue FuelSurchargeRevenue	85300000	USD
CY2017	htld	Fuel Surcharge Revenue FuelSurchargeRevenue	72500000	USD
CY2016	htld	Fuel Surcharge Revenue FuelSurchargeRevenue	58400000	USD
CY2018	us-gaap	Revenue From Contract With Customer Including Assessed Tax RevenueFromContractWithCustomerIncludingAssessedTax	14900000	USD
CY2017	us-gaap	Revenue From Contract With Customer Including Assessed Tax RevenueFromContractWithCustomerIncludingAssessedTax	24300000	USD
CY2016	us-gaap	Revenue From Contract With Customer Including Assessed Tax RevenueFromContractWithCustomerIncludingAssessedTax	29400000	USD
CY2016	us-gaap	Revenue From Contract With Customer Including Assessed Tax RevenueFromContractWithCustomerIncludingAssessedTax	29400000	USD
CY2017Q3	us-gaap	Cash Acquired From Acquisition CashAcquiredFromAcquisition	6300000	USD
CY2017	us-gaap	Business Combination Acquisition Related Costs BusinessCombinationAcquisitionRelatedCosts	900000	USD
CY2016	htld	Business Combination Pro Forma Adjustments Net Income BusinessCombinationProFormaAdjustmentsNetIncome	3900000	USD
CY2017	htld	Business Combination Pro Forma Adjustments Net Income BusinessCombinationProFormaAdjustmentsNetIncome	5700000	USD
CY2016	us-gaap	Business Acquisitions Pro Forma Revenue BusinessAcquisitionsProFormaRevenue	938007000	USD
CY2017	us-gaap	Business Acquisitions Pro Forma Revenue BusinessAcquisitionsProFormaRevenue	756498000	USD
CY2016	us-gaap	Business Acquisitions Pro Forma Net Income Loss BusinessAcquisitionsProFormaNetIncomeLoss	54222000	USD
CY2017	us-gaap	Business Acquisitions Pro Forma Net Income Loss BusinessAcquisitionsProFormaNetIncomeLoss	72752000	USD
CY2017Q3	us-gaap	Cash Acquired From Acquisition CashAcquiredFromAcquisition	6316000	USD
CY2017Q3	us-gaap	Accounts And Other Receivables Net Current AccountsAndOtherReceivablesNetCurrent	35131000	USD
CY2017Q3	us-gaap	Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Current Assets Other BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsOther	2426000	USD
CY2017Q3	us-gaap	Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Property Plant And Equipment BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedPropertyPlantAndEquipment	71964000	USD
CY2017Q3	us-gaap	Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Other Noncurrent Assets BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedOtherNoncurrentAssets	1244000	USD
CY2017Q3	us-gaap	Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Intangibles BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles	7800000	USD
CY2017Q3	us-gaap	Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Assets BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssets	157079000	USD
CY2017Q3	us-gaap	Accounts Payable And Accrued Liabilities Current And Noncurrent AccountsPayableAndAccruedLiabilitiesCurrentAndNoncurrent	35209000	USD
CY2017Q3	us-gaap	Self Insurance Reserve SelfInsuranceReserve	10826000	USD
CY2017Q3	us-gaap	Long Term Debt LongTermDebt	17404000	USD
CY2017Q3	us-gaap	Business Combination Consideration Transferred1 BusinessCombinationConsiderationTransferred1	93044000	USD
CY2017Q3	us-gaap	Payments To Acquire Businesses Gross PaymentsToAcquireBusinessesGross	93044000	USD
CY2017Q3	us-gaap	Payments To Acquire Intangible Assets PaymentsToAcquireIntangibleAssets	6316000	USD
CY2017Q3	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	86728000	USD
CY2018Q4	us-gaap	Finite Lived Intangible Assets Gross FiniteLivedIntangibleAssetsGross	25900000	USD
CY2018Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	11406000	USD
CY2018Q4	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	14494000	USD
CY2017Q4	us-gaap	Finite Lived Intangible Assets Gross FiniteLivedIntangibleAssetsGross	25900000	USD
CY2017Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	8878000	USD
CY2017Q4	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	17022000	USD
CY2018	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	2500000	USD
CY2017	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	2900000	USD
CY2018Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Next Rolling Twelve Months FiniteLivedIntangibleAssetsAmortizationExpenseNextRollingTwelveMonths	2300000	USD
CY2018Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Two FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo	1200000	USD
CY2018Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Three FiniteLivedIntangibleAssetsAmortizationExpenseYearThree	1200000	USD
CY2018Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Four FiniteLivedIntangibleAssetsAmortizationExpenseYearFour	1100000	USD
CY2018Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Five FiniteLivedIntangibleAssetsAmortizationExpenseYearFive	1000000.0	USD
CY2016Q4	us-gaap	Goodwill Goodwill	100212000	USD
CY2017	us-gaap	Goodwill Acquired During Period GoodwillAcquiredDuringPeriod	32198000	USD
CY2017Q4	us-gaap	Goodwill Goodwill	132410000	USD
CY2018	us-gaap	Goodwill Acquired During Period GoodwillAcquiredDuringPeriod	0	USD
CY2018Q4	us-gaap	Goodwill Goodwill	132410000	USD
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CY2016Q4	us-gaap	Line Of Credit Facility Maximum Borrowing Capacity LineOfCreditFacilityMaximumBorrowingCapacity	175000000.0	USD
CY2018Q3	us-gaap	Line Of Credit Facility Maximum Borrowing Capacity LineOfCreditFacilityMaximumBorrowingCapacity	100000000.0	USD
CY2014Q4	htld	Allowable Amount For Issuance Of Letters Of Credit AllowableAmountForIssuanceOfLettersOfCredit	20000000.0	USD
CY2018Q4	htld	Allowable Amount For Issuance Of Letters Of Credit AllowableAmountForIssuanceOfLettersOfCredit	30000000.0	USD
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CY2018	htld	Debt Covenant Minimum Net Income Requirement DebtCovenantMinimumNetIncomeRequirement	1.00	USD
CY2018	htld	Debt Covenant Minimum Tangible Net Worth DebtCovenantMinimumTangibleNetWorth	250000000.0	USD
CY2018Q4	us-gaap	Line Of Credit LineOfCredit	0	USD
CY2018Q4	htld	Lettersofcreditoutstandingonalineofcredit Lettersofcreditoutstandingonalineofcredit	10700000	USD
CY2017Q4	htld	Lettersofcreditoutstandingonalineofcredit Lettersofcreditoutstandingonalineofcredit	3700000	USD
CY2018Q4	us-gaap	Line Of Credit Facility Remaining Borrowing Capacity LineOfCreditFacilityRemainingBorrowingCapacity	89300000	USD
CY2017Q4	us-gaap	Line Of Credit Facility Remaining Borrowing Capacity LineOfCreditFacilityRemainingBorrowingCapacity	171300000	USD
CY2018Q4	htld	Excess Insurance Coverage Limit ExcessInsuranceCoverageLimit	100000000.0	USD
CY2018Q4	htld	Excess Insurance Coverage Limit ExcessInsuranceCoverageLimit	100000000.0	USD
CY2018Q4	htld	Trust Fund Requirements TrustFundRequirements	700000	USD
CY2018Q4	us-gaap	Held To Maturity Securities HeldToMaturitySecurities	1500000	USD
CY2017Q4	us-gaap	Held To Maturity Securities HeldToMaturitySecurities	1400000	USD
CY2018Q4	us-gaap	Letters Of Credit Outstanding Amount LettersOfCreditOutstandingAmount	13200000	USD
CY2018Q4	us-gaap	Line Of Credit LineOfCredit	0	USD
CY2017	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.35	Rate
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CY2018	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.21	Rate
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CY2018Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Accrued Liabilities DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAccruedLiabilities	3179000	USD
CY2017Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Accrued Liabilities DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAccruedLiabilities	6550000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Share Based Compensation Cost DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost	92000	USD
CY2017Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Share Based Compensation Cost DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost	156000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Self Insurance DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsSelfInsurance	15415000	USD
CY2017Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Self Insurance DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsSelfInsurance	18225000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards DeferredTaxAssetsOperatingLossCarryforwards	0	USD
CY2017Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards DeferredTaxAssetsOperatingLossCarryforwards	237000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense DeferredTaxAssetsTaxDeferredExpense	963000	USD
CY2017Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense DeferredTaxAssetsTaxDeferredExpense	1278000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	2000	USD
CY2017Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	0	USD
CY2018Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	19875000	USD
CY2017Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	26961000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	0	USD
CY2017Q4	us-gaap	Deferred Tax Liabilities Noncurrent DeferredTaxLiabilitiesNoncurrent	65488000	USD
CY2017Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	0	USD
CY2018Q4	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	19875000	USD
CY2017Q4	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	26961000	USD
CY2018Q4	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	74794000	USD
CY2017Q4	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	81322000	USD
CY2018Q4	us-gaap	Deferred Tax Liabilities Goodwill And Intangible Assets DeferredTaxLiabilitiesGoodwillAndIntangibleAssets	10319000	USD
CY2017Q4	us-gaap	Deferred Tax Liabilities Goodwill And Intangible Assets DeferredTaxLiabilitiesGoodwillAndIntangibleAssets	7984000	USD
CY2018Q4	us-gaap	Deferred Tax Liabilities Prepaid Expenses DeferredTaxLiabilitiesPrepaidExpenses	1268000	USD
CY2017Q4	us-gaap	Deferred Tax Liabilities Prepaid Expenses DeferredTaxLiabilitiesPrepaidExpenses	1406000	USD
CY2018Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	86381000	USD
CY2017Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	90712000	USD
CY2018Q4	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	66506000	USD
CY2017Q4	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	63751000	USD
CY2018Q4	us-gaap	Deferred Tax Assets Net Noncurrent DeferredTaxAssetsNetNoncurrent	4535000	USD
CY2017Q4	us-gaap	Deferred Tax Assets Net Noncurrent DeferredTaxAssetsNetNoncurrent	1737000	USD
CY2018Q4	us-gaap	Deferred Tax Liabilities Noncurrent DeferredTaxLiabilitiesNoncurrent	71041000	USD
CY2018Q4	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	66506000	USD
CY2017Q4	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	63751000	USD
CY2018	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	11985000	USD
CY2017	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	17997000	USD
CY2016	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	34664000	USD
CY2018	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	4498000	USD
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CY2016	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	454000	USD
CY2018	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	16483000	USD
CY2017	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	16502000	USD
CY2016	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	35118000	USD
CY2018	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	5537000	USD
CY2017	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	-28020000	USD
CY2016	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	-5291000	USD
CY2018	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	-2780000	USD
CY2018	us-gaap	Income Tax Reconciliation Prior Year Income Taxes IncomeTaxReconciliationPriorYearIncomeTaxes	-1327000	USD
CY2017	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	843000	USD
CY2016	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	-164000	USD
CY2018	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	2757000	USD
CY2017	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-27177000	USD
CY2016	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-5455000	USD
CY2018	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	19240000	USD
CY2017	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-10675000	USD
CY2016	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	29663000	USD
CY2018	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	19302000	USD
CY2017	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	22574000	USD
CY2016	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	30117000	USD
CY2018	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	2200000	USD
CY2017	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	178000	USD
CY2016	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	1135000	USD
CY2018	us-gaap	Income Tax Reconciliation Tax Exempt Income IncomeTaxReconciliationTaxExemptIncome	-408000	USD
CY2017	us-gaap	Income Tax Reconciliation Tax Exempt Income IncomeTaxReconciliationTaxExemptIncome	-309000	USD
CY2016	us-gaap	Income Tax Reconciliation Tax Exempt Income IncomeTaxReconciliationTaxExemptIncome	23000	USD
CY2017	us-gaap	Income Tax Reconciliation Prior Year Income Taxes IncomeTaxReconciliationPriorYearIncomeTaxes	-325000	USD
CY2016	us-gaap	Income Tax Reconciliation Prior Year Income Taxes IncomeTaxReconciliationPriorYearIncomeTaxes	-362000	USD
CY2018	us-gaap	Income Tax Reconciliation Tax Contingencies IncomeTaxReconciliationTaxContingencies	-1067000	USD
CY2017	us-gaap	Income Tax Reconciliation Tax Contingencies IncomeTaxReconciliationTaxContingencies	-1208000	USD
CY2016	us-gaap	Income Tax Reconciliation Tax Contingencies IncomeTaxReconciliationTaxContingencies	-1473000	USD
CY2018	htld	Tax Cutsand Jobs Actof2017 Incomplete Accounting Changein Tax Rate Deferred Tax Liability Provisional Income Tax Expense Benefit TaxCutsandJobsActof2017IncompleteAccountingChangeinTaxRateDeferredTaxLiabilityProvisionalIncomeTaxExpenseBenefit	0	USD
CY2017	htld	Tax Cutsand Jobs Actof2017 Incomplete Accounting Changein Tax Rate Deferred Tax Liability Provisional Income Tax Expense Benefit TaxCutsandJobsActof2017IncompleteAccountingChangeinTaxRateDeferredTaxLiabilityProvisionalIncomeTaxExpenseBenefit	32789000	USD
CY2016	htld	Tax Cutsand Jobs Actof2017 Incomplete Accounting Changein Tax Rate Deferred Tax Liability Provisional Income Tax Expense Benefit TaxCutsandJobsActof2017IncompleteAccountingChangeinTaxRateDeferredTaxLiabilityProvisionalIncomeTaxExpenseBenefit	0	USD
CY2018	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	-276000	USD
CY2017	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	586000	USD
CY2016	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	269000	USD
CY2018	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	19240000	USD
CY2017	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-10675000	USD
CY2016	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	29663000	USD
CY2018Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	4600000	USD
CY2017Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	5800000	USD
CY2018Q4	us-gaap	Unrecognized Tax Benefits That Would Impact Effective Tax Rate UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate	3600000	USD
CY2017Q4	us-gaap	Unrecognized Tax Benefits That Would Impact Effective Tax Rate UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate	4800000	USD
CY2018	us-gaap	Unrecognized Tax Benefits Period Increase Decrease UnrecognizedTaxBenefitsPeriodIncreaseDecrease	-1300000	USD
CY2017	us-gaap	Unrecognized Tax Benefits Period Increase Decrease UnrecognizedTaxBenefitsPeriodIncreaseDecrease	-2900000	USD
CY2018Q4	us-gaap	Unrecognized Tax Benefits Income Tax Penalties And Interest Accrued UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued	1000000.0	USD
CY2017Q4	us-gaap	Unrecognized Tax Benefits Income Tax Penalties And Interest Accrued UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued	2300000	USD
CY2018	us-gaap	Unrecognized Tax Benefits Income Tax Penalties And Interest Expense UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestExpense	1400000	USD
CY2017	us-gaap	Unrecognized Tax Benefits Income Tax Penalties And Interest Expense UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestExpense	900000	USD
CY2016	us-gaap	Unrecognized Tax Benefits Income Tax Penalties And Interest Expense UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestExpense	1500000	USD
CY2017Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	5839000	USD
CY2016Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	8751000	USD
CY2018	us-gaap	Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions	700000	USD
CY2017	us-gaap	Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions	135000	USD
CY2018	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions	0	USD
CY2017	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions	331000	USD
CY2018	us-gaap	Unrecognized Tax Benefits Reductions Resulting From Lapse Of Applicable Statute Of Limitations UnrecognizedTaxBenefitsReductionsResultingFromLapseOfApplicableStatuteOfLimitations	1954000	USD
CY2017	us-gaap	Unrecognized Tax Benefits Reductions Resulting From Lapse Of Applicable Statute Of Limitations UnrecognizedTaxBenefitsReductionsResultingFromLapseOfApplicableStatuteOfLimitations	2699000	USD
CY2018	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
CY2018Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	4585000	USD
CY2017Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	5839000	USD
CY2018Q4	us-gaap	Decrease In Unrecognized Tax Benefits Is Reasonably Possible DecreaseInUnrecognizedTaxBenefitsIsReasonablyPossible	700000	USD
CY2018Q4	us-gaap	Increase In Unrecognized Tax Benefits Is Reasonably Possible IncreaseInUnrecognizedTaxBenefitsIsReasonablyPossible	300000	USD
CY2018	us-gaap	Lease And Rental Expense LeaseAndRentalExpense	5000000.0	USD
CY2017	us-gaap	Lease And Rental Expense LeaseAndRentalExpense	8000000.0	USD
CY2016	us-gaap	Lease And Rental Expense LeaseAndRentalExpense	1000000.0	USD
CY2016Q4	us-gaap	Purchase Options Land PurchaseOptionsLand	21600000	USD
CY2018Q4	htld	Stock Repurchase Shares StockRepurchaseShares	6900000	shares
CY2018	us-gaap	Treasury Stock Shares Acquired TreasuryStockSharesAcquired	1400000	shares
CY2017	us-gaap	Treasury Stock Shares Acquired TreasuryStockSharesAcquired	0	shares
CY2016	us-gaap	Treasury Stock Shares Acquired TreasuryStockSharesAcquired	900000	shares
CY2018	us-gaap	Payments Of Dividends PaymentsOfDividends	6600000	USD
CY2017	us-gaap	Payments Of Dividends PaymentsOfDividends	6700000	USD
CY2016	us-gaap	Payments Of Dividends PaymentsOfDividends	6700000	USD
CY2011Q3	htld	Restricted Stock Shares Authorized RestrictedStockSharesAuthorized	900000	shares
CY2018Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Number Of Shares Available For Grant ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant	400000	shares
CY2018	us-gaap	Share Based Compensation ShareBasedCompensation	500000	USD
CY2017	us-gaap	Share Based Compensation ShareBasedCompensation	500000	USD
CY2016	us-gaap	Share Based Compensation ShareBasedCompensation	1300000	USD
CY2018Q4	us-gaap	Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized	200000	USD
CY2018	us-gaap	Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized Period For Recognition1 EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1	P0Y9M18D
CY2018	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Vested In Period Total Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalFairValue	800000	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
CY2016	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Vested In Period Total Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalFairValue	2000000.0	USD
CY2017Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Nonvested Number ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber	53700	shares
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
CY2018	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Grants In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod	10000.0	shares
CY2018	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	18.58
CY2018	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Vested In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod	35700	shares
CY2018	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	21.48
CY2018	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Forfeited In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod	1500	shares
CY2018	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
CY2018Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Nonvested Number ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber	26500	shares
CY2018Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Nonvested Weighted Average Grant Date Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue	21.31
CY2016Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Nonvested Number ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber	53000.0	shares
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
CY2017	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Grants In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod	27000.0	shares
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
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
CY2017	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Vested In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod	25300	shares
CY2017	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Forfeited In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod	1000.0	shares
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
CY2017Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Nonvested Number ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber	53700	shares
CY2017Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Nonvested Number ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber	53700	shares
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
CY2015Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Nonvested Number ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber	102400	shares
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
CY2016	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Grants In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod	74000.0	shares
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
CY2016	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Vested In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod	122200	shares
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
CY2016	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Forfeited In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod	1200	shares
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
CY2016Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Nonvested Number ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber	53000.0	shares
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
CY2018	us-gaap	Defined Contribution Plan Cost Recognized DefinedContributionPlanCostRecognized	1000000.0	USD
CY2017	us-gaap	Defined Contribution Plan Cost Recognized DefinedContributionPlanCostRecognized	1800000	USD
CY2016	us-gaap	Defined Contribution Plan Cost Recognized DefinedContributionPlanCostRecognized	1700000	USD
CY2018Q4	us-gaap	Unrecorded Unconditional Purchase Obligation Balance Sheet Amount UnrecordedUnconditionalPurchaseObligationBalanceSheetAmount	89000000.0	USD
CY2018Q1	us-gaap	Revenues Revenues	156695000	USD
CY2018Q2	us-gaap	Revenues Revenues	155826000	USD
CY2018Q3	us-gaap	Revenues Revenues	151279000	USD
CY2018Q4	us-gaap	Revenues Revenues	147003000	USD
CY2018Q1	us-gaap	Operating Income Loss OperatingIncomeLoss	12948000	USD
CY2018Q2	us-gaap	Operating Income Loss OperatingIncomeLoss	22147000	USD
CY2018Q3	us-gaap	Operating Income Loss OperatingIncomeLoss	25132000	USD
CY2018Q4	us-gaap	Operating Income Loss OperatingIncomeLoss	29560000	USD
CY2018Q1	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	13290000	USD
CY2018Q2	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	22570000	USD
CY2018Q3	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	25718000	USD
CY2018Q4	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	30339000	USD
CY2018Q1	us-gaap	Net Income Loss NetIncomeLoss	13378000	USD
CY2018Q2	us-gaap	Net Income Loss NetIncomeLoss	17803000	USD
CY2018Q3	us-gaap	Net Income Loss NetIncomeLoss	19056000	USD
CY2018Q4	us-gaap	Net Income Loss NetIncomeLoss	22440000	USD
CY2018Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.16
CY2018Q4	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.27
CY2018Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.16
CY2018Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.22
CY2018Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.23
CY2018Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.22
CY2018Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.23
CY2018Q4	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.27
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
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
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
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
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
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
CY2017Q4	us-gaap	Valuation Allowances And Reserves Balance ValuationAllowancesAndReservesBalance	1475000	USD
CY2018	us-gaap	Valuation Allowances And Reserves Charged To Cost And Expense ValuationAllowancesAndReservesChargedToCostAndExpense	0	USD
CY2018	us-gaap	Valuation Allowances And Reserves Charged To Other Accounts ValuationAllowancesAndReservesChargedToOtherAccounts	0	USD
CY2018	us-gaap	Valuation Allowances And Reserves Deductions ValuationAllowancesAndReservesDeductions	575000	USD
CY2018Q4	us-gaap	Valuation Allowances And Reserves Balance ValuationAllowancesAndReservesBalance	900000	USD
CY2016Q4	us-gaap	Valuation Allowances And Reserves Balance ValuationAllowancesAndReservesBalance	1475000	USD
CY2017	us-gaap	Valuation Allowances And Reserves Charged To Cost And Expense ValuationAllowancesAndReservesChargedToCostAndExpense	0	USD
CY2017	us-gaap	Valuation Allowances And Reserves Charged To Other Accounts ValuationAllowancesAndReservesChargedToOtherAccounts	0	USD
CY2017	us-gaap	Valuation Allowances And Reserves Deductions ValuationAllowancesAndReservesDeductions	0	USD
CY2017Q4	us-gaap	Valuation Allowances And Reserves Balance ValuationAllowancesAndReservesBalance	1475000	USD
CY2015Q4	us-gaap	Valuation Allowances And Reserves Balance ValuationAllowancesAndReservesBalance	1475000	USD
CY2016	us-gaap	Valuation Allowances And Reserves Charged To Cost And Expense ValuationAllowancesAndReservesChargedToCostAndExpense	0	USD
CY2016	us-gaap	Valuation Allowances And Reserves Charged To Other Accounts ValuationAllowancesAndReservesChargedToOtherAccounts	0	USD
CY2016	us-gaap	Valuation Allowances And Reserves Deductions ValuationAllowancesAndReservesDeductions	0	USD
CY2016Q4	us-gaap	Valuation Allowances And Reserves Balance ValuationAllowancesAndReservesBalance	1475000	USD

Files In Submission

Name	View Source	Status
0000799233-19-000006-index-headers.html	Edgar Link	pending
0000799233-19-000006-index.html	Edgar Link	pending
0000799233-19-000006.txt	Edgar Link	pending
0000799233-19-000006-xbrl.zip	Edgar Link	pending
exhibit212018q4.htm	Edgar Link	pending
exhibit3112018q4.htm	Edgar Link	pending
exhibit3122018q4.htm	Edgar Link	pending
exhibit3212018q4.htm	Edgar Link	pending
exhibit3222018q4.htm	Edgar Link	pending
FilingSummary.xml	Edgar Link	unprocessable
Financial_Report.xlsx	Edgar Link	pending
htld-20181231.htm	Edgar Link	pending
htld-20181231.xsd	Edgar Link	pending
htld-20181231_cal.xml	Edgar Link	unprocessable
htld-20181231_def.xml	Edgar Link	unprocessable
htld-20181231_htm.xml	Edgar Link	completed
htld-20181231_lab.xml	Edgar Link	unprocessable
htld-20181231_pre.xml	Edgar Link	unprocessable
MetaLinks.json	Edgar Link	pending
R1.htm	Edgar Link	pending
R10.htm	Edgar Link	pending
R11.htm	Edgar Link	pending
R12.htm	Edgar Link	pending
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R9.htm	Edgar Link	pending
report.css	Edgar Link	pending
Show.js	Edgar Link	pending

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$HTLD
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2018 Q4 Form 10-K Financial Statement

#000079923319000006 Filed on February 21, 2019

Income Statement

Balance Sheet

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Facts In Submission

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$HTLD HEARTLAND EXPRESS INC Stock $htld

2018 Q4 Form 10-K Financial Statement

#000079923319000006 Filed on February 21, 2019

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$HTLD
HEARTLAND EXPRESS INC Stock $htld