$CVLG
COVENANT LOGISTICS GROUP, INC. Stock $cvlg

$cvlg Overview Financials Valuation SEC Filings Company Website

2017 Q4 Form 10-K Financial Statement

#000100888618000007 Filed on February 28, 2018

Income Statement

Concept	2017 Q4	2017	2016 Q4
Revenue	$203.3M	$705.0M	$191.0M
YoY Change	6.46%	5.12%	-8.21%
Cost Of Revenue	$78.10M	$245.1M	$64.30M
YoY Change	21.46%	11.11%	-6.95%
Gross Profit	$125.2M	$459.9M	$126.7M
YoY Change	-1.18%	2.18%	-8.85%
Gross Profit Margin	61.58%	65.23%	66.34%
Selling, General & Admin	$91.70M	$355.3M	$94.20M
YoY Change	-2.65%	2.93%	-2.48%
% of Gross Profit	73.24%	77.26%	74.35%
Research & Development
YoY Change
% of Gross Profit
Depreciation & Amortization	$17.90M	$71.40M	$19.50M
YoY Change	-8.21%	0.0%	6.56%
% of Gross Profit	14.3%	15.53%	15.39%
Operating Expenses	$109.6M	$676.9M	$114.4M
YoY Change	-4.2%	6.06%	-0.17%
Operating Profit	$14.84M	$28.16M	$12.27M
YoY Change	21.0%	-13.23%	-49.59%
Interest Expense	-$1.200M	-$4.900M	-$1.500M
YoY Change	-20.0%	-5.77%	-6.25%
% of Operating Profit	-8.08%	-17.4%	-12.23%
Other Income/Expense, Net
YoY Change
Pretax Income	$13.60M	$23.30M	$10.80M
YoY Change	25.93%	-14.42%	-52.42%
Income Tax	$4.500M	-$32.14M	$4.800M
% Of Pretax Income	33.09%	-137.97%	44.44%
Net Earnings	$49.30M	$55.44M	$5.982M
YoY Change	724.11%	229.31%	-54.78%
Net Earnings / Revenue	24.25%	7.86%	3.13%
Basic Earnings Per Share	$2.70	$3.03	$0.33
Diluted Earnings Per Share	$2.69	$3.02	$0.33
COMMON SHARES
Basic Shares Outstanding		18.28M
Diluted Shares Outstanding		18.37M

Balance Sheet

Concept	2017 Q4	2017	2016 Q4
SHORT-TERM ASSETS
Cash & Short-Term Investments	$15.40M	$15.40M	$7.800M
YoY Change	97.44%	97.44%	73.33%
Cash & Equivalents	$15.36M	$15.40M	$7.750M
Short-Term Investments
Other Short-Term Assets	$1.817M	$12.00M
YoY Change		-11.76%
Inventory	$4.200M	$4.200M	$4.000M
Prepaid Expenses	$8.699M		$10.89M
Receivables	$104.2M	$104.2M	$96.64M
Other Receivables	$26.60M	$26.60M	$13.00M
Total Short-Term Assets	$162.3M	$162.3M	$135.0M
YoY Change	20.27%	20.22%	-21.91%
LONG-TERM ASSETS
Property, Plant & Equipment	$464.1M	$464.1M	$465.5M
YoY Change	-0.3%	-0.3%	2.52%
Goodwill	$0.00		$0.00
YoY Change
Intangibles	$0.00		$0.00
YoY Change
Long-Term Investments	$20.15M	$20.10M	$18.53M
YoY Change	8.74%	8.65%	10.35%
Other Assets	$23.28M	$3.100M	$20.10M
YoY Change	15.81%	93.75%	1.38%
Total Long-Term Assets	$487.4M	$487.4M	$485.6M
YoY Change	0.37%	0.39%	2.47%
TOTAL ASSETS
Total Short-Term Assets	$162.3M	$162.3M	$135.0M
Total Long-Term Assets	$487.4M	$487.4M	$485.6M
Total Assets	$649.7M	$649.7M	$620.5M
YoY Change	4.69%	4.71%	-4.05%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$11.86M	$11.90M	$13.03M
YoY Change	-9.02%	-8.46%	6.19%
Accrued Expenses	$26.52M	$41.60M	$26.61M
YoY Change	-0.33%	-5.02%	-11.73%
Deferred Revenue
YoY Change
Short-Term Debt	$0.00	$0.00	$200.0K
YoY Change	-100.0%	-100.0%	-95.74%
Long-Term Debt Due	$24.60M	$27.60M	$24.95M
YoY Change	-1.41%	0.73%	-36.67%
Total Short-Term Liabilities	$81.22M	$81.20M	$87.78M
YoY Change	-7.47%	-7.52%	-30.46%
LONG-TERM LIABILITIES
Long-Term Debt	$164.5M	$186.2M	$168.7M
YoY Change	-2.5%	-1.17%	-13.97%
Other Long-Term Liabilities	$1.825M	$23.70M	$2.883M
YoY Change	-36.7%	0.0%	-76.84%
Total Long-Term Liabilities	$166.3M	$209.9M	$171.6M
YoY Change	-3.07%	-1.04%	-17.72%
TOTAL LIABILITIES
Total Short-Term Liabilities	$81.22M	$81.20M	$87.78M
Total Long-Term Liabilities	$166.3M	$209.9M	$171.6M
Total Liabilities	$354.5M	$354.5M	$384.1M
YoY Change	-7.72%	-7.71%	-13.59%
SHAREHOLDERS EQUITY
Retained Earnings	$157.5M		$102.0M
YoY Change	54.33%		23.0%
Common Stock
YoY Change
Preferred Stock
YoY Change
Treasury Stock (at cost)			$1.084M
YoY Change			-68.19%
Treasury Stock Shares			$23.66K
Shareholders Equity	$295.2M	$295.2M	$236.4M
YoY Change
Total Liabilities & Shareholders Equity	$649.7M	$649.7M	$620.5M
YoY Change	4.69%	4.71%	-4.05%

Cashflow Statement

Concept	2017 Q4	2017	2016 Q4
OPERATING ACTIVITIES
Net Income	$49.30M	$55.44M	$5.982M
YoY Change	724.11%	229.31%	-54.78%
Depreciation, Depletion And Amortization	$17.90M	$71.40M	$19.50M
YoY Change	-8.21%	0.0%	6.56%
Cash From Operating Activities	$20.10M	$82.85M	$20.30M
YoY Change	-0.99%	-19.11%	194.2%
INVESTING ACTIVITIES
Capital Expenditures	-$20.90M	$110.8M	-$11.90M
YoY Change	75.63%	-1.77%	-67.31%
Acquisitions
YoY Change
Other Investing Activities	$16.00M	$48.70M	$10.50M
YoY Change	52.38%	-25.65%	228.13%
Cash From Investing Activities	-$4.900M	-$62.05M	-$1.300M
YoY Change	276.92%	31.23%	-96.08%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net		$0.00
YoY Change
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	-8.100M	-13.19M	-16.30M
YoY Change	-50.31%	-74.57%	-197.02%
NET CHANGE
Cash From Operating Activities	20.10M	82.85M	20.30M
Cash From Investing Activities	-4.900M	-62.05M	-1.300M
Cash From Financing Activities	-8.100M	-13.19M	-16.30M
Net Change In Cash	7.100M	7.606M	2.700M
YoY Change	162.96%	133.31%	-128.42%
FREE CASH FLOW
Cash From Operating Activities	$20.10M	$82.85M	$20.30M
Capital Expenditures	-$20.90M	$110.8M	-$11.90M
Free Cash Flow	$41.00M	-$27.95M	$32.20M
YoY Change	27.33%	169.67%	-25.64%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value
CY2017	cvti	Auto Policy Release Premium Refund AutoPolicyReleasePremiumRefund	14600000
CY2017	cvti	Cargo Losses Purchased Coverage Per Claim CargoLossesPurchasedCoveragePerClaim	300000
CY2017Q4	cvti	Debt Secured With A Cross Default Feature DebtSecuredWithACrossDefaultFeature	120800000
CY2017	cvti	Depreciation And Amortization Including Gains And Losses On Disposition Of Equipment DepreciationAndAmortizationIncludingGainsAndLossesOnDispositionOfEquipment	76447000
CY2016	cvti	Depreciation And Amortization Including Gains And Losses On Disposition Of Equipment DepreciationAndAmortizationIncludingGainsAndLossesOnDispositionOfEquipment	72456000
CY2015	cvti	Depreciation And Amortization Including Gains And Losses On Disposition Of Equipment DepreciationAndAmortizationIncludingGainsAndLossesOnDispositionOfEquipment	61384000
CY2017Q4	cvti	Drivers Advances And Other Receivables Net Of Allowance DriversAdvancesAndOtherReceivablesNetOfAllowance	15062000
CY2016Q4	cvti	Drivers Advances And Other Receivables Net Of Allowance DriversAdvancesAndOtherReceivablesNetOfAllowance	8757000
CY2017	cvti	Employee Annual Insuarnce Deductible Per Claim EmployeeAnnualInsuarnceDeductiblePerClaim	400000
CY2017	cvti	Excess Tax Benefit Deficit From Sharebased Compensation Operating Activities ExcessTaxBenefitDeficitFromSharebasedCompensationOperatingActivities	-457000
CY2016	cvti	Excess Tax Benefit Deficit From Sharebased Compensation Operating Activities ExcessTaxBenefitDeficitFromSharebasedCompensationOperatingActivities	-1108000
CY2015	cvti	Excess Tax Benefit Deficit From Sharebased Compensation Operating Activities ExcessTaxBenefitDeficitFromSharebasedCompensationOperatingActivities
CY2017	cvti	Fixed Charge Coverage Requirement FixedChargeCoverageRequirement	0
CY2016	cvti	Fixed Charge Coverage Requirement FixedChargeCoverageRequirement	0
CY2017Q4	cvti	Insurance Policy Primary Occurence Limit InsurancePolicyPrimaryOccurenceLimit	1000000
CY2017Q4	cvti	Liability For Claims And Claims Adjustment Expense Aggregate Limit Per Policy Year LiabilityForClaimsAndClaimsAdjustmentExpenseAggregateLimitPerPolicyYear	18000000
CY2017Q4	cvti	Liability For Claims And Claims Adjustment Expense Aggregate Three Year Limit LiabilityForClaimsAndClaimsAdjustmentExpenseAggregateThreeYearLimit	30000000
CY2017Q4	cvti	Liability For Claims And Claims Adjustment Expense Single Loss Limit LiabilityForClaimsAndClaimsAdjustmentExpenseSingleLossLimit	9000000
CY2017	cvti	Line Of Credit Facility Availability As Percentage Of Revolver Commitment LineOfCreditFacilityAvailabilityAsPercentageOfRevolverCommitment	0.35
CY2017Q4	cvti	Line Of Credit Facility Maximum Increase In Borrowing Capacity LineOfCreditFacilityMaximumIncreaseInBorrowingCapacity	50000000
CY2017	cvti	Line Of Credit Facility Revolver Commitment Amount LineOfCreditFacilityRevolverCommitmentAmount	25000000
CY2017Q4	cvti	Maximum Number Of Shares Of Class A Common Stock Awarded To Any Participant In The Incentive Plan In Any Calendar Year MaximumNumberOfSharesOfClassACommonStockAwardedToAnyParticipantInTheIncentivePlanInAnyCalendarYear	200000
CY2017	cvti	Number Of Assetbased Operating Fleets Aggregated In A Segment NumberOfAssetbasedOperatingFleetsAggregatedInASegment	3
CY2017	cvti	Percent Of Appraised Fair Market Value Of Eligible Real Estate PercentOfAppraisedFairMarketValueOfEligibleRealEstate	0.65
CY2017	cvti	Percent Of Appraised Net Orderly Liquidation Value Of Eligible Revenue Equipment PercentOfAppraisedNetOrderlyLiquidationValueOfEligibleRevenueEquipment	0.85
CY2017	cvti	Percent Of Eligible Accounts Receivable PercentOfEligibleAccountsReceivable	0.85
CY2017	cvti	Percent Of Net Book Value Of Eligible Revenue Equipment PercentOfNetBookValueOfEligibleRevenueEquipment	0.95
CY2017	cvti	Physical Damage Coverage PhysicalDamageCoverage	1
CY2015Q2	cvti	Reduction In Insurance And Claims Expense ReductionInInsuranceAndClaimsExpense	3600000
CY2017	cvti	Returnofissuanceofcashcollateralonfuelhedge Returnofissuanceofcashcollateralonfuelhedge
CY2016	cvti	Returnofissuanceofcashcollateralonfuelhedge Returnofissuanceofcashcollateralonfuelhedge
CY2015	cvti	Returnofissuanceofcashcollateralonfuelhedge Returnofissuanceofcashcollateralonfuelhedge	5000000
CY2017	cvti	Revenue Equipment Rentals And Purchased Transportation RevenueEquipmentRentalsAndPurchasedTransportation	141954000
CY2016	cvti	Revenue Equipment Rentals And Purchased Transportation RevenueEquipmentRentalsAndPurchasedTransportation	117472000
CY2015	cvti	Revenue Equipment Rentals And Purchased Transportation RevenueEquipmentRentalsAndPurchasedTransportation	118583000
CY2017	cvti	Reversal Of Deferred Gains Of Sale Of Property ReversalOfDeferredGainsOfSaleOfProperty	-179000
CY2016	cvti	Reversal Of Deferred Gains Of Sale Of Property ReversalOfDeferredGainsOfSaleOfProperty	-207000
CY2015	cvti	Reversal Of Deferred Gains Of Sale Of Property ReversalOfDeferredGainsOfSaleOfProperty	-26000
CY2017	cvti	Workers Compensation Self Insurance Per Claim WorkersCompensationSelfInsurancePerClaim	1300000
CY2017Q4	cvti	Working Capital Deficit WorkingCapitalDeficit	81100000
CY2016Q4	cvti	Working Capital Deficit WorkingCapitalDeficit	47900000
CY2017Q4	us-gaap	Accounts Payable Current AccountsPayableCurrent	11857000
CY2016Q4	us-gaap	Accounts Payable Current AccountsPayableCurrent	13032000
CY2017Q4	us-gaap	Accounts Receivable Net Current AccountsReceivableNetCurrent	104153000
CY2016Q4	us-gaap	Accounts Receivable Net Current AccountsReceivableNetCurrent	96636000
CY2017Q4	us-gaap	Accrued Insurance Current AccruedInsuranceCurrent	15042000
CY2016Q4	us-gaap	Accrued Insurance Current AccruedInsuranceCurrent	17177000
CY2017Q4	us-gaap	Accrued Insurance Noncurrent AccruedInsuranceNoncurrent	21836000
CY2016Q4	us-gaap	Accrued Insurance Noncurrent AccruedInsuranceNoncurrent	20866000
CY2017Q4	us-gaap	Accrued Liabilities Current AccruedLiabilitiesCurrent	26520000
CY2016Q4	us-gaap	Accrued Liabilities Current AccruedLiabilitiesCurrent	26607000
CY2017Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	186916000
CY2016Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	165605000
CY2017Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	293000
CY2016Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-2640000
CY2017Q4	us-gaap	Additional Paid In Capital AdditionalPaidInCapital	137242000
CY2016Q4	us-gaap	Additional Paid In Capital AdditionalPaidInCapital	137912000
CY2015	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	1296000
CY2016	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	1178000
CY2017	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	951000
CY2017	us-gaap	Adjustments To Additional Paid In Capital Tax Effect From Share Based Compensation AdjustmentsToAdditionalPaidInCapitalTaxEffectFromShareBasedCompensation	500000
CY2016	us-gaap	Adjustments To Additional Paid In Capital Tax Effect From Share Based Compensation AdjustmentsToAdditionalPaidInCapitalTaxEffectFromShareBasedCompensation	1100000
CY2015	us-gaap	Adjustments To Additional Paid In Capital Tax Effect From Share Based Compensation AdjustmentsToAdditionalPaidInCapitalTaxEffectFromShareBasedCompensation	0
CY2017	us-gaap	Allocated Share Based Compensation Expense Net Of Tax AllocatedShareBasedCompensationExpenseNetOfTax	1201000
CY2016	us-gaap	Allocated Share Based Compensation Expense Net Of Tax AllocatedShareBasedCompensationExpenseNetOfTax	1378000
CY2015	us-gaap	Allocated Share Based Compensation Expense Net Of Tax AllocatedShareBasedCompensationExpenseNetOfTax	1496000
CY2016Q4	us-gaap	Allowance For Doubtful Accounts Receivable AllowanceForDoubtfulAccountsReceivable	1345000
CY2017Q4	us-gaap	Allowance For Doubtful Accounts Receivable AllowanceForDoubtfulAccountsReceivable	1456000
CY2015Q4	us-gaap	Allowance For Doubtful Accounts Receivable AllowanceForDoubtfulAccountsReceivable	1857000
CY2014Q4	us-gaap	Allowance For Doubtful Accounts Receivable AllowanceForDoubtfulAccountsReceivable	1767000
CY2017Q4	us-gaap	Allowance For Doubtful Accounts Receivable Current AllowanceForDoubtfulAccountsReceivableCurrent	1456000
CY2016Q4	us-gaap	Allowance For Doubtful Accounts Receivable Current AllowanceForDoubtfulAccountsReceivableCurrent	1345000
CY2017	us-gaap	Allowance For Doubtful Accounts Receivable Write Offs AllowanceForDoubtfulAccountsReceivableWriteOffs	343000
CY2016	us-gaap	Allowance For Doubtful Accounts Receivable Write Offs AllowanceForDoubtfulAccountsReceivableWriteOffs	271000
CY2015	us-gaap	Allowance For Doubtful Accounts Receivable Write Offs AllowanceForDoubtfulAccountsReceivableWriteOffs	1010000
CY2017Q4	us-gaap	Allowance For Notes And Loans Receivable Current AllowanceForNotesAndLoansReceivableCurrent	556000
CY2015	us-gaap	Amortization Of Financing Costs AmortizationOfFinancingCosts	261000
CY2017	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	0
CY2016Q4	us-gaap	Allowance For Notes And Loans Receivable Current AllowanceForNotesAndLoansReceivableCurrent	519000
CY2017	us-gaap	Amortization Of Financing Costs AmortizationOfFinancingCosts	242000
CY2016	us-gaap	Amortization Of Financing Costs AmortizationOfFinancingCosts	293000
CY2016	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	200000
CY2015	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	100000
CY2017	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	100000
CY2017Q4	us-gaap	Assets Assets	649668000
CY2016Q4	us-gaap	Assets Assets	620538000
CY2017Q4	us-gaap	Assets Current AssetsCurrent	162314000
CY2016Q4	us-gaap	Assets Current AssetsCurrent	134963000
CY2017Q4	us-gaap	Assets Of Disposal Group Including Discontinued Operation Current AssetsOfDisposalGroupIncludingDiscontinuedOperationCurrent	1444000
CY2016Q4	us-gaap	Assets Of Disposal Group Including Discontinued Operation Current AssetsOfDisposalGroupIncludingDiscontinuedOperationCurrent	2695000
CY2017Q4	us-gaap	Bank Overdrafts BankOverdrafts
CY2016Q4	us-gaap	Bank Overdrafts BankOverdrafts	189000
CY2017Q4	us-gaap	Capital Lease Obligations Current CapitalLeaseObligationsCurrent	2962000
CY2016Q4	us-gaap	Capital Lease Obligations Current CapitalLeaseObligationsCurrent	2441000
CY2017	us-gaap	Capital Lease Obligations Incurred CapitalLeaseObligationsIncurred	9953000
CY2016	us-gaap	Capital Lease Obligations Incurred CapitalLeaseObligationsIncurred	11765000
CY2015	us-gaap	Capital Lease Obligations Incurred CapitalLeaseObligationsIncurred	1318000
CY2017Q4	us-gaap	Capital Lease Obligations Noncurrent CapitalLeaseObligationsNoncurrent	21777000
CY2016Q4	us-gaap	Capital Lease Obligations Noncurrent CapitalLeaseObligationsNoncurrent	19761000
CY2017Q4	us-gaap	Capital Leased Assets Gross CapitalLeasedAssetsGross	30500000
CY2016Q4	us-gaap	Capital Leased Assets Gross CapitalLeasedAssetsGross	26600000
CY2017Q4	us-gaap	Capital Leases Future Minimum Payments Due CapitalLeasesFutureMinimumPaymentsDue	26951000
CY2017Q4	us-gaap	Capital Leases Future Minimum Payments Due Current CapitalLeasesFutureMinimumPaymentsDueCurrent	3606000
CY2017Q4	us-gaap	Capital Leases Future Minimum Payments Due In Five Years CapitalLeasesFutureMinimumPaymentsDueInFiveYears	5175000
CY2017Q4	us-gaap	Capital Leases Future Minimum Payments Due In Four Years CapitalLeasesFutureMinimumPaymentsDueInFourYears	5368000
CY2017Q4	us-gaap	Capital Leases Future Minimum Payments Due In Three Years CapitalLeasesFutureMinimumPaymentsDueInThreeYears	5813000
CY2017Q4	us-gaap	Capital Leases Future Minimum Payments Due In Two Years CapitalLeasesFutureMinimumPaymentsDueInTwoYears	3606000
CY2017Q4	us-gaap	Capital Leases Future Minimum Payments Due Thereafter CapitalLeasesFutureMinimumPaymentsDueThereafter	3383000
CY2017Q4	us-gaap	Capital Leases Future Minimum Payments Interest Included In Payments CapitalLeasesFutureMinimumPaymentsInterestIncludedInPayments	2212000
CY2017Q4	us-gaap	Capital Leases Future Minimum Payments Present Value Of Net Minimum Payments CapitalLeasesFutureMinimumPaymentsPresentValueOfNetMinimumPayments	24739000
CY2017	us-gaap	Capital Leases Income Statement Amortization Expense CapitalLeasesIncomeStatementAmortizationExpense	2600000
CY2016	us-gaap	Capital Leases Income Statement Amortization Expense CapitalLeasesIncomeStatementAmortizationExpense	1600000
CY2015	us-gaap	Capital Leases Income Statement Amortization Expense CapitalLeasesIncomeStatementAmortizationExpense	2000000
CY2017Q4	us-gaap	Capital Leases Lessee Balance Sheet Assets By Major Class Accumulated Deprecation CapitalLeasesLesseeBalanceSheetAssetsByMajorClassAccumulatedDeprecation	5400000
CY2016Q4	us-gaap	Capital Leases Lessee Balance Sheet Assets By Major Class Accumulated Deprecation CapitalLeasesLesseeBalanceSheetAssetsByMajorClassAccumulatedDeprecation	4200000
CY2017	us-gaap	Cargo And Freight Revenue CargoAndFreightRevenue	626809000
CY2016	us-gaap	Cargo And Freight Revenue CargoAndFreightRevenue	610845000
CY2015	us-gaap	Cargo And Freight Revenue CargoAndFreightRevenue	640120000
CY2016Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	7750000
CY2015Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	4490000
CY2014Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	21330000
CY2017Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	15356000
CY2017	us-gaap	Cash And Cash Equivalents Period Increase Decrease CashAndCashEquivalentsPeriodIncreaseDecrease	7606000
CY2016	us-gaap	Cash And Cash Equivalents Period Increase Decrease CashAndCashEquivalentsPeriodIncreaseDecrease	3260000
CY2015	us-gaap	Cash And Cash Equivalents Period Increase Decrease CashAndCashEquivalentsPeriodIncreaseDecrease	-16840000
CY2017Q4	us-gaap	Cash Flow Hedge Derivative Instrument Assets At Fair Value CashFlowHedgeDerivativeInstrumentAssetsAtFairValue	800000
CY2016Q4	us-gaap	Cash Flow Hedge Derivative Instrument Assets At Fair Value CashFlowHedgeDerivativeInstrumentAssetsAtFairValue	3600000
CY2017	us-gaap	Cash Flow Hedge Gain Loss To Be Reclassified Within Twelve Months CashFlowHedgeGainLossToBeReclassifiedWithinTwelveMonths	600000
CY2017Q4	us-gaap	Commitments And Contingencies CommitmentsAndContingencies
CY2016Q4	us-gaap	Commitments And Contingencies CommitmentsAndContingencies
CY2017Q4	us-gaap	Commodity Contract Asset Current CommodityContractAssetCurrent	800000
CY2017	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	58372000
CY2016	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	31739000
CY2015	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	37642000
CY2017	us-gaap	Cost Of Services Direct Taxes And Licenses Costs CostOfServicesDirectTaxesAndLicensesCosts	9878000
CY2016	us-gaap	Cost Of Services Direct Taxes And Licenses Costs CostOfServicesDirectTaxesAndLicensesCosts	11712000
CY2015	us-gaap	Cost Of Services Direct Taxes And Licenses Costs CostOfServicesDirectTaxesAndLicensesCosts	11016000
CY2017	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	-7780000
CY2016	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	11951000
CY2015	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	124000
CY2017	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	-1737000
CY2016	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	1811000
CY2015	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	426000
CY2017	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	-28055000
CY2016	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	-2925000
CY2015	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	18185000
CY2017Q4	us-gaap	Deferred Finance Costs Current Net DeferredFinanceCostsCurrentNet	140000
CY2016Q4	us-gaap	Deferred Finance Costs Current Net DeferredFinanceCostsCurrentNet	263000
CY2017Q4	us-gaap	Deferred Finance Costs Noncurrent Net DeferredFinanceCostsNoncurrentNet	298000
CY2016Q4	us-gaap	Deferred Finance Costs Noncurrent Net DeferredFinanceCostsNoncurrentNet	256000
CY2017	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-23023000
CY2016	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-922000
CY2015	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	20701000
CY2017Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	93122000
CY2016Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	114586000
CY2017	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	5430000
CY2016	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	-451000
CY2015	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	3087000
CY2017Q4	us-gaap	Deferred Tax Assets Derivative Instruments DeferredTaxAssetsDerivativeInstruments
CY2016Q4	us-gaap	Deferred Tax Assets Derivative Instruments DeferredTaxAssetsDerivativeInstruments	1653000
CY2017Q4	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	29778000
CY2016Q4	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	30429000
CY2017Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards DeferredTaxAssetsOperatingLossCarryforwards	4755000
CY2016Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards DeferredTaxAssetsOperatingLossCarryforwards	3326000
CY2017Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	4414000
CY2016Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	5113000
CY2017Q4	us-gaap	Deferred Tax Assets Tax Credit Carryforwards DeferredTaxAssetsTaxCreditCarryforwards	11875000
CY2016Q4	us-gaap	Deferred Tax Assets Tax Credit Carryforwards DeferredTaxAssetsTaxCreditCarryforwards	6409000
CY2017Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Self Insurance DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsSelfInsurance	8797000
CY2016Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Self Insurance DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsSelfInsurance	15147000
CY2017Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	63000
CY2016Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	1219000
CY2017Q4	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	63344000
CY2016Q4	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	84157000
CY2017Q4	us-gaap	Deferred Tax Liabilities Derivatives DeferredTaxLiabilitiesDerivatives	99000
CY2016Q4	us-gaap	Deferred Tax Liabilities Derivatives DeferredTaxLiabilitiesDerivatives
CY2017Q4	us-gaap	Deferred Tax Liabilities Investment In Noncontrolled Affiliates DeferredTaxLiabilitiesInvestmentInNoncontrolledAffiliates	14197000
CY2016Q4	us-gaap	Deferred Tax Liabilities Investment In Noncontrolled Affiliates DeferredTaxLiabilitiesInvestmentInNoncontrolledAffiliates	9730000
CY2017Q4	us-gaap	Deferred Tax Liabilities Noncurrent DeferredTaxLiabilitiesNoncurrent	63344000
CY2016Q4	us-gaap	Deferred Tax Liabilities Noncurrent DeferredTaxLiabilitiesNoncurrent	84157000
CY2017Q4	us-gaap	Deferred Tax Liabilities Other DeferredTaxLiabilitiesOther
CY2016Q4	us-gaap	Deferred Tax Liabilities Other DeferredTaxLiabilitiesOther	1391000
CY2017Q4	us-gaap	Deferred Tax Liabilities Prepaid Expenses DeferredTaxLiabilitiesPrepaidExpenses	2501000
CY2016Q4	us-gaap	Deferred Tax Liabilities Prepaid Expenses DeferredTaxLiabilitiesPrepaidExpenses	4786000
CY2017Q4	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	76325000
CY2016Q4	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	98679000
CY2017	us-gaap	Defined Contribution Plan Cost Recognized DefinedContributionPlanCostRecognized	900000
CY2016	us-gaap	Defined Contribution Plan Cost Recognized DefinedContributionPlanCostRecognized	700000
CY2015	us-gaap	Defined Contribution Plan Cost Recognized DefinedContributionPlanCostRecognized	800000
CY2017	us-gaap	Depreciation Depreciation	72400000
CY2016	us-gaap	Depreciation Depreciation	71400000
CY2015	us-gaap	Depreciation Depreciation	61900000
CY2017	us-gaap	Depreciation And Amortization DepreciationAndAmortization	72422000
CY2016	us-gaap	Depreciation And Amortization DepreciationAndAmortization	71647000
CY2015	us-gaap	Depreciation And Amortization DepreciationAndAmortization	62010000
CY2017Q4	us-gaap	Derivative Assets Liabilities At Fair Value Net DerivativeAssetsLiabilitiesAtFairValueNet	393000
CY2016Q4	us-gaap	Derivative Assets Liabilities At Fair Value Net DerivativeAssetsLiabilitiesAtFairValueNet	-4293000
CY2017	us-gaap	Derivative Instruments Gain Loss Reclassified From Accumulated Oci Into Income Effective Portion Net DerivativeInstrumentsGainLossReclassifiedFromAccumulatedOCIIntoIncomeEffectivePortionNet	4100000
CY2016	us-gaap	Derivative Instruments Gain Loss Reclassified From Accumulated Oci Into Income Effective Portion Net DerivativeInstrumentsGainLossReclassifiedFromAccumulatedOCIIntoIncomeEffectivePortionNet	16700000
CY2015	us-gaap	Derivative Instruments Gain Loss Reclassified From Accumulated Oci Into Income Effective Portion Net DerivativeInstrumentsGainLossReclassifiedFromAccumulatedOCIIntoIncomeEffectivePortionNet	15300000
CY2017	us-gaap	Direct Communications And Utilities Costs DirectCommunicationsAndUtilitiesCosts	6938000
CY2016	us-gaap	Direct Communications And Utilities Costs DirectCommunicationsAndUtilitiesCosts	6057000
CY2015	us-gaap	Direct Communications And Utilities Costs DirectCommunicationsAndUtilitiesCosts	6162000
CY2017	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	3.03
CY2016	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.93
CY2015	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	2.32
CY2017Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0
CY2017Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.08
CY2017Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.25
CY2016Q4	us-gaap	Equity Method Investment Summarized Financial Information Noncurrent Assets EquityMethodInvestmentSummarizedFinancialInformationNoncurrentAssets	146081000
CY2017Q4	us-gaap	Equity Method Investment Summarized Financial Information Noncurrent Liabilities EquityMethodInvestmentSummarizedFinancialInformationNoncurrentLiabilities	117135000
CY2016Q4	us-gaap	Equity Method Investment Summarized Financial Information Noncurrent Liabilities EquityMethodInvestmentSummarizedFinancialInformationNoncurrentLiabilities	96140000
CY2017	us-gaap	Equity Method Investment Summarized Financial Information Revenue EquityMethodInvestmentSummarizedFinancialInformationRevenue	84865000
CY2017Q4	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	2.70
CY2016Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.21
CY2016Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.20
CY2016Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.16
CY2016Q4	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.33
CY2017	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	3.02
CY2016	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.92
CY2015	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	2.30
CY2017Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0
CY2017Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.08
CY2017Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.25
CY2017Q4	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	2.69
CY2016Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.21
CY2016Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.20
CY2016Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.16
CY2016Q4	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.33
CY2017	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.35
CY2017Q4	us-gaap	Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized	2100000
CY2017	us-gaap	Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized Period For Recognition1 EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1	P2Y
CY2017	us-gaap	Equity Method Investment Summarized Financial Information Cost Of Sales EquityMethodInvestmentSummarizedFinancialInformationCostOfSales	72868000
CY2016	us-gaap	Equity Method Investment Summarized Financial Information Cost Of Sales EquityMethodInvestmentSummarizedFinancialInformationCostOfSales	83475000
CY2015	us-gaap	Equity Method Investment Summarized Financial Information Cost Of Sales EquityMethodInvestmentSummarizedFinancialInformationCostOfSales	91644000
CY2017Q4	us-gaap	Equity Method Investment Summarized Financial Information Current Assets EquityMethodInvestmentSummarizedFinancialInformationCurrentAssets	19660000
CY2016Q4	us-gaap	Equity Method Investment Summarized Financial Information Current Assets EquityMethodInvestmentSummarizedFinancialInformationCurrentAssets	14320000
CY2017Q4	us-gaap	Equity Method Investment Summarized Financial Information Current Liabilities EquityMethodInvestmentSummarizedFinancialInformationCurrentLiabilities	53981000
CY2016Q4	us-gaap	Equity Method Investment Summarized Financial Information Current Liabilities EquityMethodInvestmentSummarizedFinancialInformationCurrentLiabilities	34766000
CY2017Q4	us-gaap	Equity Method Investment Summarized Financial Information Equity EquityMethodInvestmentSummarizedFinancialInformationEquity	32449000
CY2016Q4	us-gaap	Equity Method Investment Summarized Financial Information Equity EquityMethodInvestmentSummarizedFinancialInformationEquity	29495000
CY2017	us-gaap	Equity Method Investment Summarized Financial Information Income Loss From Continuing Operations Before Extraordinary Items EquityMethodInvestmentSummarizedFinancialInformationIncomeLossFromContinuingOperationsBeforeExtraordinaryItems	11997000
CY2016	us-gaap	Equity Method Investment Summarized Financial Information Income Loss From Continuing Operations Before Extraordinary Items EquityMethodInvestmentSummarizedFinancialInformationIncomeLossFromContinuingOperationsBeforeExtraordinaryItems	10957000
CY2015	us-gaap	Equity Method Investment Summarized Financial Information Income Loss From Continuing Operations Before Extraordinary Items EquityMethodInvestmentSummarizedFinancialInformationIncomeLossFromContinuingOperationsBeforeExtraordinaryItems	13194000
CY2017	us-gaap	Equity Method Investment Summarized Financial Information Net Income Loss EquityMethodInvestmentSummarizedFinancialInformationNetIncomeLoss	6954000
CY2016	us-gaap	Equity Method Investment Summarized Financial Information Net Income Loss EquityMethodInvestmentSummarizedFinancialInformationNetIncomeLoss	6598000
CY2015	us-gaap	Equity Method Investment Summarized Financial Information Net Income Loss EquityMethodInvestmentSummarizedFinancialInformationNetIncomeLoss	9061000
CY2017Q4	us-gaap	Equity Method Investment Summarized Financial Information Noncurrent Assets EquityMethodInvestmentSummarizedFinancialInformationNoncurrentAssets	183905000
CY2016	us-gaap	Equity Method Investment Summarized Financial Information Revenue EquityMethodInvestmentSummarizedFinancialInformationRevenue	94432000
CY2015	us-gaap	Equity Method Investment Summarized Financial Information Revenue EquityMethodInvestmentSummarizedFinancialInformationRevenue	104838000
CY2017Q4	us-gaap	Equity Method Investments EquityMethodInvestments	20145000
CY2016Q4	us-gaap	Equity Method Investments EquityMethodInvestments	18526000
CY2017	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-32142000
CY2016	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	10386000
CY2015	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	21822000
CY2017	us-gaap	Income Tax Expense Benefit Continuing Operations Adjustment Of Deferred Tax Asset Liability IncomeTaxExpenseBenefitContinuingOperationsAdjustmentOfDeferredTaxAssetLiability	40100000
CY2017	us-gaap	Fuel Costs FuelCosts	103139000
CY2016	us-gaap	Fuel Costs FuelCosts	103108000
CY2015	us-gaap	Fuel Costs FuelCosts	122160000
CY2017	us-gaap	Gain Loss On Disposition Of Assets GainLossOnDispositionOfAssets	-4024000
CY2016	us-gaap	Gain Loss On Disposition Of Assets GainLossOnDispositionOfAssets	-808000
CY2015	us-gaap	Gain Loss On Disposition Of Assets GainLossOnDispositionOfAssets	626000
CY2017	us-gaap	Gain Loss On Investments GainLossOnInvestments	-1960000
CY2016	us-gaap	Gain Loss On Investments GainLossOnInvestments	-1470000
CY2015	us-gaap	Gain Loss On Investments GainLossOnInvestments
CY2017Q4	us-gaap	Goodwill Goodwill	0
CY2016Q4	us-gaap	Goodwill Goodwill	0
CY2017	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	23297000
CY2016	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	27221000
CY2015	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	63907000
CY2017	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	3400000
CY2016	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	3000000
CY2015	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	4570000
CY2017	us-gaap	Income Tax Reconciliation Change In Deferred Tax Assets Valuation Allowance IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance	-1167000
CY2016	us-gaap	Income Tax Reconciliation Change In Deferred Tax Assets Valuation Allowance IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance
CY2015	us-gaap	Income Tax Reconciliation Change In Deferred Tax Assets Valuation Allowance IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance	218000
CY2017	us-gaap	Income Tax Reconciliation Change In Enacted Tax Rate IncomeTaxReconciliationChangeInEnactedTaxRate	-40123000
CY2016	us-gaap	Income Tax Reconciliation Change In Enacted Tax Rate IncomeTaxReconciliationChangeInEnactedTaxRate
CY2015	us-gaap	Income Tax Reconciliation Change In Enacted Tax Rate IncomeTaxReconciliationChangeInEnactedTaxRate
CY2017	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	8154000
CY2016	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	9527000
CY2015	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	22368000
CY2017	us-gaap	Income Tax Reconciliation Nondeductible Expense Other IncomeTaxReconciliationNondeductibleExpenseOther	2145000
CY2016	us-gaap	Income Tax Reconciliation Nondeductible Expense Other IncomeTaxReconciliationNondeductibleExpenseOther	2205000
CY2015	us-gaap	Income Tax Reconciliation Nondeductible Expense Other IncomeTaxReconciliationNondeductibleExpenseOther	2329000
CY2017	us-gaap	Income Tax Reconciliation Nondeductible Expense Share Based Compensation Cost IncomeTaxReconciliationNondeductibleExpenseShareBasedCompensationCost	-457000
CY2016	us-gaap	Income Tax Reconciliation Nondeductible Expense Share Based Compensation Cost IncomeTaxReconciliationNondeductibleExpenseShareBasedCompensationCost
CY2015	us-gaap	Income Tax Reconciliation Nondeductible Expense Share Based Compensation Cost IncomeTaxReconciliationNondeductibleExpenseShareBasedCompensationCost
CY2017	us-gaap	Income Tax Reconciliation Other Reconciling Items IncomeTaxReconciliationOtherReconcilingItems	-429000
CY2016	us-gaap	Income Tax Reconciliation Other Reconciling Items IncomeTaxReconciliationOtherReconcilingItems	-1332000
CY2015	us-gaap	Income Tax Reconciliation Other Reconciling Items IncomeTaxReconciliationOtherReconcilingItems	222000
CY2017	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	862000
CY2016	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	953000
CY2015	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	2237000
CY2017	us-gaap	Income Tax Reconciliation Tax Contingencies IncomeTaxReconciliationTaxContingencies	-43000
CY2016	us-gaap	Income Tax Reconciliation Tax Contingencies IncomeTaxReconciliationTaxContingencies	-273000
CY2015	us-gaap	Income Tax Reconciliation Tax Contingencies IncomeTaxReconciliationTaxContingencies	1599000
CY2017	us-gaap	Income Tax Reconciliation Tax Credits IncomeTaxReconciliationTaxCredits	1084000
CY2016	us-gaap	Income Tax Reconciliation Tax Credits IncomeTaxReconciliationTaxCredits	694000
CY2015	us-gaap	Income Tax Reconciliation Tax Credits IncomeTaxReconciliationTaxCredits	7151000
CY2017	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	-2222000
CY2016	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	6412000
CY2015	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	8112000
CY2017Q4	us-gaap	Income Taxes Receivable IncomeTaxesReceivable	11551000
CY2016Q4	us-gaap	Income Taxes Receivable IncomeTaxesReceivable	4256000
CY2017	us-gaap	Increase Decrease In Accounts Payable And Accrued Liabilities IncreaseDecreaseInAccountsPayableAndAccruedLiabilities	-3425000
CY2016	us-gaap	Increase Decrease In Accounts Payable And Accrued Liabilities IncreaseDecreaseInAccountsPayableAndAccruedLiabilities	-5116000
CY2015	us-gaap	Increase Decrease In Accounts Payable And Accrued Liabilities IncreaseDecreaseInAccountsPayableAndAccruedLiabilities	-10562000
CY2017	us-gaap	Increase Decrease In Insurance Liabilities IncreaseDecreaseInInsuranceLiabilities	-1165000
CY2016	us-gaap	Increase Decrease In Insurance Liabilities IncreaseDecreaseInInsuranceLiabilities	-1390000
CY2015	us-gaap	Increase Decrease In Insurance Liabilities IncreaseDecreaseInInsuranceLiabilities	-1304000
CY2017	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	252000
CY2016	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	-24000
CY2015	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	-398000
CY2017	us-gaap	Increase Decrease In Prepaid Deferred Expense And Other Assets IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets	-1768000
CY2016	us-gaap	Increase Decrease In Prepaid Deferred Expense And Other Assets IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets	1464000
CY2015	us-gaap	Increase Decrease In Prepaid Deferred Expense And Other Assets IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets	-2688000
CY2017	us-gaap	Increase Decrease In Receivables IncreaseDecreaseInReceivables	23670000
CY2016	us-gaap	Increase Decrease In Receivables IncreaseDecreaseInReceivables	-21207000
CY2015	us-gaap	Increase Decrease In Receivables IncreaseDecreaseInReceivables	28120000
CY2017	us-gaap	Incremental Common Shares Attributable To Contingently Issuable Shares IncrementalCommonSharesAttributableToContingentlyIssuableShares
CY2016	us-gaap	Incremental Common Shares Attributable To Contingently Issuable Shares IncrementalCommonSharesAttributableToContingentlyIssuableShares
CY2015	us-gaap	Incremental Common Shares Attributable To Contingently Issuable Shares IncrementalCommonSharesAttributableToContingentlyIssuableShares	5000
CY2017	us-gaap	Incremental Common Shares Attributable To Equity Unit Purchase Agreements IncrementalCommonSharesAttributableToEquityUnitPurchaseAgreements	93000
CY2016	us-gaap	Incremental Common Shares Attributable To Equity Unit Purchase Agreements IncrementalCommonSharesAttributableToEquityUnitPurchaseAgreements	84000
CY2015	us-gaap	Incremental Common Shares Attributable To Equity Unit Purchase Agreements IncrementalCommonSharesAttributableToEquityUnitPurchaseAgreements	161000
CY2017Q4	us-gaap	Intangible Assets Net Excluding Goodwill IntangibleAssetsNetExcludingGoodwill	0
CY2017	us-gaap	Interest Costs Capitalized InterestCostsCapitalized	100000
CY2016	us-gaap	Interest Costs Capitalized InterestCostsCapitalized	100000
CY2015	us-gaap	Interest Costs Capitalized InterestCostsCapitalized	100000
CY2017	us-gaap	Interest Expense Debt InterestExpenseDebt	8258000
CY2016	us-gaap	Interest Expense Debt InterestExpenseDebt	8226000
CY2015	us-gaap	Interest Expense Debt InterestExpenseDebt	8445000
CY2017	us-gaap	Interest Paid Net InterestPaidNet	8268000
CY2016	us-gaap	Interest Paid Net InterestPaidNet	8453000
CY2015	us-gaap	Interest Paid Net InterestPaidNet	8371000
CY2017	us-gaap	Labor And Related Expense LaborAndRelatedExpense	241784000
CY2016	us-gaap	Labor And Related Expense LaborAndRelatedExpense	234526000
CY2015	us-gaap	Labor And Related Expense LaborAndRelatedExpense	244779000
CY2017	us-gaap	Lease And Rental Expense LeaseAndRentalExpense	12764000
CY2016	us-gaap	Lease And Rental Expense LeaseAndRentalExpense	11735000
CY2015	us-gaap	Lease And Rental Expense LeaseAndRentalExpense	15029000
CY2017Q4	us-gaap	Letters Of Credit Outstanding Amount LettersOfCreditOutstandingAmount	32900000
CY2016Q4	us-gaap	Letters Of Credit Outstanding Amount LettersOfCreditOutstandingAmount	27200000
CY2017Q4	us-gaap	Leveraged Leases Net Investment In Leveraged Leases Disclosure Residual Value Of Leased Assets LeveragedLeasesNetInvestmentInLeveragedLeasesDisclosureResidualValueOfLeasedAssets	4000000
CY2016Q4	us-gaap	Leveraged Leases Net Investment In Leveraged Leases Disclosure Residual Value Of Leased Assets LeveragedLeasesNetInvestmentInLeveragedLeasesDisclosureResidualValueOfLeasedAssets	4000000
CY2017Q4	us-gaap	Liabilities Liabilities	354467000
CY2016Q4	us-gaap	Liabilities Liabilities	384124000
CY2017Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	649668000
CY2016Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	620538000
CY2017Q4	us-gaap	Liabilities Current LiabilitiesCurrent	81220000
CY2016Q4	us-gaap	Liabilities Current LiabilitiesCurrent	87781000
CY2017Q4	us-gaap	Liability For Claims And Claims Adjustment Expense LiabilityForClaimsAndClaimsAdjustmentExpense	20000000
CY2017Q4	us-gaap	Liability For Uncertain Tax Positions Current LiabilityForUncertainTaxPositionsCurrent	2800000
CY2016Q4	us-gaap	Liability For Uncertain Tax Positions Current LiabilityForUncertainTaxPositionsCurrent	2800000
CY2017Q4	us-gaap	Line Of Credit LineOfCredit	9000000
CY2017Q4	us-gaap	Line Of Credit Facility Maximum Borrowing Capacity LineOfCreditFacilityMaximumBorrowingCapacity	95000000
CY2017Q4	us-gaap	Line Of Credit Facility Remaining Borrowing Capacity LineOfCreditFacilityRemainingBorrowingCapacity	53100000
CY2017	us-gaap	Line Of Credit Facility Unused Capacity Commitment Fee Percentage LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage	0.0025
CY2017Q4	us-gaap	Lines Of Credit Current LinesOfCreditCurrent
CY2016Q4	us-gaap	Lines Of Credit Current LinesOfCreditCurrent
CY2017Q4	us-gaap	Long Term Debt And Capital Lease Obligations LongTermDebtAndCapitalLeaseObligations	186242000
CY2016Q4	us-gaap	Long Term Debt And Capital Lease Obligations LongTermDebtAndCapitalLeaseObligations	188437000
CY2017Q4	us-gaap	Long Term Debt And Capital Lease Obligations Current LongTermDebtAndCapitalLeaseObligationsCurrent	27558000
CY2016Q4	us-gaap	Long Term Debt And Capital Lease Obligations Current LongTermDebtAndCapitalLeaseObligationsCurrent	27388000
CY2017Q4	us-gaap	Long Term Debt Current LongTermDebtCurrent	24596000
CY2016Q4	us-gaap	Long Term Debt Current LongTermDebtCurrent	24947000
CY2017Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal After Year Five LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive	22800000
CY2017Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Next Twelve Months LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths	24736000
CY2017Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Five LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive	22018000
CY2017Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Four LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour	46410000
CY2017Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Three LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree	25578000
CY2017Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Two LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo	47957000
CY2017Q4	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	164465000
CY2016Q4	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	168676000
CY2017Q4	us-gaap	Long Term Line Of Credit LongTermLineOfCredit	9007000
CY2016Q4	us-gaap	Long Term Line Of Credit LongTermLineOfCredit	12185000
CY2017	us-gaap	Maintenance Costs MaintenanceCosts	48774000
CY2016	us-gaap	Maintenance Costs MaintenanceCosts	45864000
CY2015	us-gaap	Maintenance Costs MaintenanceCosts	46458000
CY2017	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-13194000
CY2016	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-51883000
CY2015	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	45359000
CY2017	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-62053000
CY2016	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-47287000
CY2015	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-147676000
CY2017	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	82853000
CY2016	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	102430000
CY2015	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	85477000
CY2017	us-gaap	Net Income Loss NetIncomeLoss	55439000
CY2016	us-gaap	Net Income Loss NetIncomeLoss	16835000
CY2015	us-gaap	Net Income Loss NetIncomeLoss	42085000
CY2017Q1	us-gaap	Net Income Loss NetIncomeLoss	-39000
CY2017Q2	us-gaap	Net Income Loss NetIncomeLoss	1548000
CY2017Q3	us-gaap	Net Income Loss NetIncomeLoss	4632000
CY2017Q4	us-gaap	Net Income Loss NetIncomeLoss	49298000
CY2016Q1	us-gaap	Net Income Loss NetIncomeLoss	4352000
CY2016Q2	us-gaap	Net Income Loss NetIncomeLoss	3632000
CY2016Q3	us-gaap	Net Income Loss NetIncomeLoss	2869000
CY2016Q4	us-gaap	Net Income Loss NetIncomeLoss	5982000
CY2017	us-gaap	Number Of Reportable Segments NumberOfReportableSegments	2
CY2017	us-gaap	Operating Expenses OperatingExpenses	676852000
CY2016	us-gaap	Operating Expenses OperatingExpenses	638204000
CY2015	us-gaap	Operating Expenses OperatingExpenses	656458000
CY2017	us-gaap	Operating Income Loss OperatingIncomeLoss	28155000
CY2016	us-gaap	Operating Income Loss OperatingIncomeLoss	32447000
CY2015	us-gaap	Operating Income Loss OperatingIncomeLoss	67782000
CY2017Q1	us-gaap	Operating Income Loss OperatingIncomeLoss	309000
CY2017Q2	us-gaap	Operating Income Loss OperatingIncomeLoss	3962000
CY2017Q3	us-gaap	Operating Income Loss OperatingIncomeLoss	9041000
CY2017Q4	us-gaap	Operating Income Loss OperatingIncomeLoss	14843000
CY2016Q1	us-gaap	Operating Income Loss OperatingIncomeLoss	7418000
CY2016Q2	us-gaap	Operating Income Loss OperatingIncomeLoss	7316000
CY2016Q3	us-gaap	Operating Income Loss OperatingIncomeLoss	5446000
CY2016Q4	us-gaap	Operating Income Loss OperatingIncomeLoss	12267000
CY2017	us-gaap	Operating Insurance And Claims Costs Production OperatingInsuranceAndClaimsCostsProduction	33155000
CY2016	us-gaap	Operating Insurance And Claims Costs Production OperatingInsuranceAndClaimsCostsProduction	32596000
CY2015	us-gaap	Operating Insurance And Claims Costs Production OperatingInsuranceAndClaimsCostsProduction	31909000
CY2017Q4	us-gaap	Operating Leases Future Minimum Payments Due OperatingLeasesFutureMinimumPaymentsDue	219000
CY2017Q4	us-gaap	Operating Leases Future Minimum Payments Due Current OperatingLeasesFutureMinimumPaymentsDueCurrent	73000
CY2017Q4	us-gaap	Operating Leases Future Minimum Payments Due In Five Years OperatingLeasesFutureMinimumPaymentsDueInFiveYears
CY2017Q4	us-gaap	Operating Leases Future Minimum Payments Due In Four Years OperatingLeasesFutureMinimumPaymentsDueInFourYears
CY2017Q4	us-gaap	Operating Leases Future Minimum Payments Due In Three Years OperatingLeasesFutureMinimumPaymentsDueInThreeYears	73000
CY2017Q4	us-gaap	Operating Leases Future Minimum Payments Due In Two Years OperatingLeasesFutureMinimumPaymentsDueInTwoYears	73000
CY2017Q4	us-gaap	Operating Leases Future Minimum Payments Due Thereafter OperatingLeasesFutureMinimumPaymentsDueThereafter
CY2017Q4	us-gaap	Other Assets Current OtherAssetsCurrent	1817000
CY2016Q4	us-gaap	Other Assets Current OtherAssetsCurrent
CY2017Q4	us-gaap	Other Assets Miscellaneous OtherAssetsMiscellaneous	3137000
CY2016Q4	us-gaap	Other Assets Miscellaneous OtherAssetsMiscellaneous	1578000
CY2017Q4	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	23282000
CY2016Q4	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	20104000
CY2015	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-4443000
CY2016	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	14904000
CY2017	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	2933000
CY2017	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	2933000
CY2016	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	14904000
CY2015	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-4443000
CY2017	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci On Derivatives Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesNetOfTax	-2784000
CY2016	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci On Derivatives Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesNetOfTax	-10597000
CY2015	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci On Derivatives Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesNetOfTax	-9608000
CY2017	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci On Derivatives Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesTax	-1719000
CY2016	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci On Derivatives Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesTax	-6634000
CY2015	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci On Derivatives Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesTax	-5964000
CY2017	us-gaap	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax	149000
CY2016	us-gaap	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax	4307000
CY2015	us-gaap	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax	-14051000
CY2017	us-gaap	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Tax OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodTax	51000
CY2016	us-gaap	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Tax OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodTax	2696000
CY2015	us-gaap	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Tax OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodTax	-8722000
CY2017	us-gaap	Other Cost And Expense Operating OtherCostAndExpenseOperating	14783000
CY2016	us-gaap	Other Cost And Expense Operating OtherCostAndExpenseOperating	14413000
CY2015	us-gaap	Other Cost And Expense Operating OtherCostAndExpenseOperating	14007000
CY2017Q4	us-gaap	Other Inventory Supplies OtherInventorySupplies	4232000
CY2016Q4	us-gaap	Other Inventory Supplies OtherInventorySupplies	3980000
CY2017Q4	us-gaap	Other Liabilities Current OtherLiabilitiesCurrent	243000
CY2016Q4	us-gaap	Other Liabilities Current OtherLiabilitiesCurrent	3388000
CY2017Q4	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	1825000
CY2016Q4	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	2883000
CY2017	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock
CY2016	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock
CY2017Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	464072000
CY2015	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	4994000
CY2017	us-gaap	Payments Of Financing Costs PaymentsOfFinancingCosts	160000
CY2016	us-gaap	Payments Of Financing Costs PaymentsOfFinancingCosts	108000
CY2015	us-gaap	Payments Of Financing Costs PaymentsOfFinancingCosts	242000
CY2017	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	785000
CY2016	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	1142000
CY2015	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	2280000
CY2017	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	110802000
CY2016	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	112794000
CY2015	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	181963000
CY2017Q4	us-gaap	Prepaid Expense Current PrepaidExpenseCurrent	8699000
CY2016Q4	us-gaap	Prepaid Expense Current PrepaidExpenseCurrent	10889000
CY2016	us-gaap	Prior Period Reclassification Adjustment PriorPeriodReclassificationAdjustment	2247000
CY2017	us-gaap	Proceeds From Lines Of Credit ProceedsFromLinesOfCredit	1271669000
CY2016	us-gaap	Proceeds From Lines Of Credit ProceedsFromLinesOfCredit	1023978000
CY2015	us-gaap	Proceeds From Lines Of Credit ProceedsFromLinesOfCredit	870432000
CY2017	us-gaap	Proceeds From Notes Payable ProceedsFromNotesPayable	121210000
CY2016	us-gaap	Proceeds From Notes Payable ProceedsFromNotesPayable	69432000
CY2015	us-gaap	Proceeds From Notes Payable ProceedsFromNotesPayable	113077000
CY2017	us-gaap	Proceeds From Repayments Of Bank Overdrafts ProceedsFromRepaymentsOfBankOverdrafts	-189000
CY2016	us-gaap	Proceeds From Repayments Of Bank Overdrafts ProceedsFromRepaymentsOfBankOverdrafts	-4509000
CY2015	us-gaap	Proceeds From Repayments Of Bank Overdrafts ProceedsFromRepaymentsOfBankOverdrafts	4698000
CY2017	us-gaap	Proceeds From Sale Of Property Plant And Equipment ProceedsFromSaleOfPropertyPlantAndEquipment	48749000
CY2016	us-gaap	Proceeds From Sale Of Property Plant And Equipment ProceedsFromSaleOfPropertyPlantAndEquipment	65507000
CY2015	us-gaap	Proceeds From Sale Of Property Plant And Equipment ProceedsFromSaleOfPropertyPlantAndEquipment	34287000
CY2017	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised
CY2016	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	32000
CY2015	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	1092000
CY2017Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	650988000
CY2016Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	631076000
CY2016Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	465471000
CY2017	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	454000
CY2016	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	-241000
CY2015	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	1100000
CY2016	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Forfeited In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod	16000
CY2017	us-gaap	Reimbursement Revenue ReimbursementRevenue	78198000
CY2016	us-gaap	Reimbursement Revenue ReimbursementRevenue	59806000
CY2015	us-gaap	Reimbursement Revenue ReimbursementRevenue	84120000
CY2017	us-gaap	Repayments Of Lines Of Credit RepaymentsOfLinesOfCredit	1274847000
CY2016	us-gaap	Repayments Of Lines Of Credit RepaymentsOfLinesOfCredit	1014796000
CY2015	us-gaap	Repayments Of Lines Of Credit RepaymentsOfLinesOfCredit	867430000
CY2017	us-gaap	Repayments Of Long Term Capital Lease Obligations RepaymentsOfLongTermCapitalLeaseObligations	7416000
CY2016	us-gaap	Repayments Of Long Term Capital Lease Obligations RepaymentsOfLongTermCapitalLeaseObligations	4140000
CY2015	us-gaap	Repayments Of Long Term Capital Lease Obligations RepaymentsOfLongTermCapitalLeaseObligations	1718000
CY2017	us-gaap	Repayments Of Notes Payable RepaymentsOfNotesPayable	122676000
CY2016	us-gaap	Repayments Of Notes Payable RepaymentsOfNotesPayable	120630000
CY2015	us-gaap	Repayments Of Notes Payable RepaymentsOfNotesPayable	67276000
CY2017Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	157471000
CY2016Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	102032000
CY2017	us-gaap	Revenues Revenues	705007000
CY2016	us-gaap	Revenues Revenues	670651000
CY2015	us-gaap	Revenues Revenues	724240000
CY2017Q1	us-gaap	Revenues Revenues	158744000
CY2017Q2	us-gaap	Revenues Revenues	164326000
CY2017Q3	us-gaap	Revenues Revenues	178631000
CY2017Q4	us-gaap	Revenues Revenues	203306000
CY2016Q1	us-gaap	Revenues Revenues	156341000
CY2016Q2	us-gaap	Revenues Revenues	158832000
CY2016Q3	us-gaap	Revenues Revenues	164500000
CY2016Q4	us-gaap	Revenues Revenues	190978000
CY2015	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Forfeited In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod	129000
CY2017	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Forfeited In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod	16000
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	5.38
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	16.53
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	19.25
CY2015	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Grants In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod	63000
CY2016	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Grants In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod	120000
CY2017	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Grants In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod	434000
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	28.10
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	18.92
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	16.69
CY2014Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Nonvested Number ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber	642000
CY2015Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Nonvested Number ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber	330000
CY2016Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Nonvested Number ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber	265000
CY2017Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Nonvested Number ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber	587000
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	6.60
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	12.43
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	18.63
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	18.14
CY2015	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Vested In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod	246000
CY2016	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Vested In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod	169000
CY2017	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Vested In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod	96000
CY2017	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Vested In Period Total Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalFairValue	2400000
CY2016	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Vested In Period Total Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalFairValue	3500000
CY2015	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Vested In Period Total Fair Value ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalFairValue	6500000
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	4.97
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	5.28
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	12.78
CY2017Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Number Of Shares Authorized ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized	1550000
CY2017Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Number Of Shares Available For Grant ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant	186430
CY2017Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber
CY2015	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Forfeitures In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresInPeriod
CY2016	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Forfeitures In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresInPeriod
CY2017	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Forfeitures In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresInPeriod
CY2017	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Gross ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross	0
CY2016	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Gross ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross	0
CY2015	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Gross ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross	0
CY2014Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue	945000
CY2015Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue	15000
CY2016Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue
CY2017Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue
CY2014Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	76000
CY2015Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	3000
CY2016Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber
CY2017Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber
CY2014Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	14.73
CY2015Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	12.79
CY2016Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice
CY2017Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice
CY2015	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Exercises In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice	14.79
CY2016	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Exercises In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice	12.79
CY2017	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Exercises In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice
CY2015	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Forfeitures In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsForfeituresInPeriodWeightedAverageExercisePrice
CY2016	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Forfeitures In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsForfeituresInPeriodWeightedAverageExercisePrice
CY2017	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Forfeitures In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsForfeituresInPeriodWeightedAverageExercisePrice
CY2015	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Grants In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice
CY2016	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Grants In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice
CY2017	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Grants In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice
CY2014	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Outstanding Weighted Average Remaining Contractual Term2 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2	P182D
CY2015	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Outstanding Weighted Average Remaining Contractual Term2 SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2	P146D
CY2015	us-gaap	Stock Issued During Period Shares Stock Options Exercised StockIssuedDuringPeriodSharesStockOptionsExercised	73000
CY2016	us-gaap	Stock Issued During Period Shares Stock Options Exercised StockIssuedDuringPeriodSharesStockOptionsExercised	3000
CY2017	us-gaap	Stock Issued During Period Shares Stock Options Exercised StockIssuedDuringPeriodSharesStockOptionsExercised
CY2015	us-gaap	Stock Issued During Period Value Restricted Stock Award Net Of Forfeitures StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures	-2080000
CY2016	us-gaap	Stock Issued During Period Value Restricted Stock Award Net Of Forfeitures StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures	-942000
CY2017	us-gaap	Stock Issued During Period Value Restricted Stock Award Net Of Forfeitures StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures	-536000
CY2015	us-gaap	Stock Issued During Period Value Stock Options Exercised StockIssuedDuringPeriodValueStockOptionsExercised	1092000
CY2016	us-gaap	Stock Issued During Period Value Stock Options Exercised StockIssuedDuringPeriodValueStockOptionsExercised	32000
CY2014Q4	us-gaap	Stockholders Equity StockholdersEquity	169204000
CY2015Q4	us-gaap	Stockholders Equity StockholdersEquity	202160000
CY2016Q4	us-gaap	Stockholders Equity StockholdersEquity	236414000
CY2017Q4	us-gaap	Stockholders Equity StockholdersEquity	295201000
CY2017Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	295201000
CY2016Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	236414000
CY2017Q4	us-gaap	Treasury Stock Shares TreasuryStockShares
CY2016Q4	us-gaap	Treasury Stock Shares TreasuryStockShares	23656
CY2017Q4	us-gaap	Treasury Stock Value TreasuryStockValue
CY2016Q4	us-gaap	Treasury Stock Value TreasuryStockValue	1084000
CY2015	us-gaap	Treasury Stock Value Acquired Cost Method TreasuryStockValueAcquiredCostMethod	4994000
CY2017	us-gaap	Unrealized Gain Loss On Cash Flow Hedging Instruments UnrealizedGainLossOnCashFlowHedgingInstruments
CY2016	us-gaap	Unrealized Gain Loss On Cash Flow Hedging Instruments UnrealizedGainLossOnCashFlowHedgingInstruments
CY2015	us-gaap	Unrealized Gain Loss On Cash Flow Hedging Instruments UnrealizedGainLossOnCashFlowHedgingInstruments	1454000
CY2016Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	2051000
CY2015Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	2394000
CY2014Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	995000
CY2017Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	1924000
CY2017	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions	10000
CY2016	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions	0
CY2015	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions	0
CY2017	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Settlements With Taxing Authorities UnrecognizedTaxBenefitsDecreasesResultingFromSettlementsWithTaxingAuthorities
CY2016	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Settlements With Taxing Authorities UnrecognizedTaxBenefitsDecreasesResultingFromSettlementsWithTaxingAuthorities	88000
CY2015	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Settlements With Taxing Authorities UnrecognizedTaxBenefitsDecreasesResultingFromSettlementsWithTaxingAuthorities	182000
CY2017	us-gaap	Unrecognized Tax Benefits Income Tax Penalties And Interest Expense UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestExpense	800000
CY2016	us-gaap	Unrecognized Tax Benefits Income Tax Penalties And Interest Expense UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestExpense	800000
CY2017	us-gaap	Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions
CY2016	us-gaap	Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions
CY2015	us-gaap	Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions
CY2017	us-gaap	Unrecognized Tax Benefits Increases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions	19000
CY2016	us-gaap	Unrecognized Tax Benefits Increases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions
CY2015	us-gaap	Unrecognized Tax Benefits Increases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions	1737000
CY2017	us-gaap	Unrecognized Tax Benefits Reductions Resulting From Lapse Of Applicable Statute Of Limitations UnrecognizedTaxBenefitsReductionsResultingFromLapseOfApplicableStatuteOfLimitations	136000
CY2016	us-gaap	Unrecognized Tax Benefits Reductions Resulting From Lapse Of Applicable Statute Of Limitations UnrecognizedTaxBenefitsReductionsResultingFromLapseOfApplicableStatuteOfLimitations	255000
CY2015	us-gaap	Unrecognized Tax Benefits Reductions Resulting From Lapse Of Applicable Statute Of Limitations UnrecognizedTaxBenefitsReductionsResultingFromLapseOfApplicableStatuteOfLimitations	156000
CY2017Q4	us-gaap	Unrecognized Tax Benefits That Would Impact Effective Tax Rate UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate	2500000
CY2016Q4	us-gaap	Unrecognized Tax Benefits That Would Impact Effective Tax Rate UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate	2400000
CY2017	us-gaap	Use Of Estimates UseOfEstimates	<div style="display: inline; font-family: times new roman; font-size: 10pt"><div style="display: inline; font-family: times new roman; font-size: 10pt"><div style="display: inline; font-family: times new roman; font-size: 10pt"><div style="display: inline; font-family: times new roman; font-size: 10pt"><div style="display: inline; font-family: times new roman; font-size: 10pt"><div style="display: inline; font-family: times new roman; font-size: 10pt"><div style="display: inline; font-family: times new roman; font-size: 10pt"><div style="display: inline; font-family: times new roman; font-size: 10pt"><div style="display: inline; font-family: times new roman; font-size: 10pt"><div style="display: inline; font-family: times new roman; font-size: 10pt"><div style="display: inline; font-family: times new roman; font-size: 10pt"><div style="display: inline; font-family: times new roman; font-size: 10pt"><div style="display: inline; font-family: times new roman; font-size: 10pt"><div style="display: inline; font-family: times new roman; font-size: 10pt"><div style="display: inline; font-family: times new roman; font-size: 10pt"><div style=" margin: 0pt; text-align: justify; font-family: Times New Roman, Times, serif; font-size: 10pt;"><div style="display: inline; font-weight: bold;"><div style="display: inline; font-style: italic;">E<div style="display: inline; font-family: Times New Roman, Times, serif; font-size: 10pt;">stimates</div></div></div></div> <div style=" margin: 0pt; text-align: justify; font-family: Times New Roman, Times, serif; font-size: 10pt;"> </div> <div style=" margin: 0pt; text-align: justify; font-family: Times New Roman, Times, serif; font-size: 10pt;">The preparation of financial statements in conformity with accounting principles generally accepted in the United States of America requires us to make decisions based upon estimates, assumptions, and factors we consider as relevant to the circumstances. <div style="display: inline; font-family: Times New Roman, Times, serif; font-size: 10pt;">Such decisions include the selection of applicable accounting principles and the use of judgment in their application, the results of which impact reported amounts and disclosures. Changes in future economic conditions or other business circumstances <div style="display: inline; font-style: italic; font-weight: inherit; font-style: normal;"> may </div>affect the outcomes of our estimates and assumptions. Accordingly, actual results could differ from those anticipated. </div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div>
CY2017	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	18372000
CY2016	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	18266000
CY2015	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	18311000
CY2017	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	18279000
CY2016	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	18182000
CY2015	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	18145000

Files In Submission

Name	View Source	Status
0001008886-18-000007-index-headers.html	Edgar Link	pending
0001008886-18-000007-index.html	Edgar Link	pending
0001008886-18-000007.txt	Edgar Link	pending
0001008886-18-000007-xbrl.zip	Edgar Link	pending
averagefreightrevenuepertota.jpg	Edgar Link	pending
averagefreightrevenuepertrac.jpg	Edgar Link	pending
averagemilespertractor.jpg	Edgar Link	pending
cvti-20171231.xml	Edgar Link	completed
cvti-20171231.xsd	Edgar Link	pending
cvti-20171231_cal.xml	Edgar Link	unprocessable
cvti-20171231_def.xml	Edgar Link	unprocessable
cvti-20171231_lab.xml	Edgar Link	unprocessable
cvti-20171231_pre.xml	Edgar Link	unprocessable
cvtilogo.jpg	Edgar Link	pending
distributionoffreightrevenue.jpg	Edgar Link	pending
exhibit1027.htm	Edgar Link	pending
exhibit21.htm	Edgar Link	pending
exhibit231.htm	Edgar Link	pending
exhibit232.htm	Edgar Link	pending
exhibit311.htm	Edgar Link	pending
exhibit312.htm	Edgar Link	pending
exhibit321.htm	Edgar Link	pending
exhibit322.htm	Edgar Link	pending
exhibit99.htm	Edgar Link	pending
FilingSummary.xml	Edgar Link	unprocessable
Financial_Report.xlsx	Edgar Link	pending
form10k.htm	Edgar Link	pending
R1.htm	Edgar Link	pending
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report.css	Edgar Link	pending
Show.js	Edgar Link	pending

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$CVLG
COVENANT LOGISTICS GROUP, INC. Stock $cvlg

2017 Q4 Form 10-K Financial Statement

#000100888618000007 Filed on February 28, 2018

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$CVLG COVENANT LOGISTICS GROUP, INC. Stock $cvlg

2017 Q4 Form 10-K Financial Statement

#000100888618000007 Filed on February 28, 2018

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$CVLG
COVENANT LOGISTICS GROUP, INC. Stock $cvlg