$VTOL
Bristow Group Inc. Stock $vtol

$vtol Overview Financials Valuation SEC Filings Company Website

2017 Form 10-K Financial Statement

#000152522118000014 Filed on March 09, 2018

Income Statement

Concept	2017	2016 Q4	2016 Q3
Revenue	$231.3M	$56.29M	$65.01M
YoY Change	-6.43%	-23.88%	-6.79%
Cost Of Revenue	$167.4M	$37.80M	$40.40M
YoY Change	-1.47%	-16.19%	-6.05%
Gross Profit	$63.90M	$18.50M	$24.60M
YoY Change	-17.44%	-35.99%	-7.87%
Gross Profit Margin	27.62%	32.87%	37.84%
Selling, General & Admin	$42.10M	$9.300M	$9.500M
YoY Change	16.3%	-16.22%	-15.18%
% of Gross Profit	65.88%	50.27%	38.62%
Research & Development
YoY Change
% of Gross Profit
Depreciation & Amortization	$45.74M	$11.34M	$12.52M
YoY Change	-7.26%	-6.67%	2.73%
% of Gross Profit	71.57%	61.3%	50.89%
Operating Expenses	$87.90M	$20.70M	$22.00M
YoY Change	2.81%	-10.78%	-5.98%
Operating Profit	-$136.5M	-$1.421M	$2.366M
YoY Change	3950.58%	-129.71%	-53.82%
Interest Expense	$16.76M	-$5.400M	$4.003M
YoY Change	-3.24%	38.46%	28.26%
% of Operating Profit			169.19%
Other Income/Expense, Net	-$16.24M	$0.00	-$3.536M
YoY Change	1.57%	-100.0%	28.54%
Pretax Income	-$148.2M	-$6.900M	-$1.170M
YoY Change	1048.05%	-400.0%	-149.33%
Income Tax	-$122.7M	-$1.200M	$100.0K
% Of Pretax Income
Net Earnings	-$28.16M	-$5.648M	-$560.0K
YoY Change	252.98%	56.02%	-165.04%
Net Earnings / Revenue	-12.17%	-10.03%	-0.86%
Basic Earnings Per Share	-$1.36	-$0.27	-$0.03
Diluted Earnings Per Share	-$1.36	-$0.27	-$0.03
COMMON SHARES
Basic Shares Outstanding	20.76M shares	20.94M shares	20.38M shares
Diluted Shares Outstanding	20.76M shares		20.38M shares

Balance Sheet

Concept	2017	2016 Q4	2016 Q3
SHORT-TERM ASSETS
Cash & Short-Term Investments	$13.60M	$27.00M	$32.10M
YoY Change	-49.63%	87.5%	132.61%
Cash & Equivalents	$13.60M	$26.95M	$32.14M
Short-Term Investments
Other Short-Term Assets	$4.500M	$5.400M	$190.0K
YoY Change	-16.67%	2727.23%	-97.53%
Inventory	$21.10M	$25.42M	$26.62M
Prepaid Expenses		$1.579M	$1.799M
Receivables	$39.00M	$32.50M	$34.30M
Other Receivables	$4.400M	$6.100M	$6.500M
Total Short-Term Assets	$82.60M	$96.37M	$101.5M
YoY Change	-14.32%	-6.02%	14.89%
LONG-TERM ASSETS
Property, Plant & Equipment	$673.9M	$821.8M	$828.0M
YoY Change	-18.0%	-4.35%	-4.23%
Goodwill
YoY Change
Intangibles		$1.137M	$1.141M
YoY Change		-1.81%	-19.14%
Long-Term Investments	$30.10M	$29.27M	$29.60M
YoY Change	2.73%	1.27%	-2.31%
Other Assets	$4.400M	$6.591M	$11.18M
YoY Change	-33.33%	-47.41%	-10.74%
Total Long-Term Assets	$709.5M	$858.8M	$869.9M
YoY Change	-17.38%	-4.77%	-4.45%
TOTAL ASSETS
Total Short-Term Assets	$82.60M	$96.37M	$101.5M
Total Long-Term Assets	$709.5M	$858.8M	$869.9M
Total Assets	$792.1M	$955.2M	$971.5M
YoY Change	-17.07%	-4.9%	-2.73%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$16.40M	$8.900M	$9.100M
YoY Change	84.27%	-25.83%	-24.17%
Accrued Expenses	$13.30M	$13.90M	$18.80M
YoY Change	-4.32%	-17.26%	13.25%
Deferred Revenue
YoY Change
Short-Term Debt	$0.00	$0.00	$0.00
YoY Change
Long-Term Debt Due	$2.700M	$2.139M	$1.539M
YoY Change	28.57%	-36.83%	-93.93%
Total Short-Term Liabilities	$32.40M	$25.62M	$29.99M
YoY Change	26.56%	-20.0%	-51.2%
LONG-TERM LIABILITIES
Long-Term Debt	$202.2M	$230.1M	$232.7M
YoY Change	-12.13%	-12.98%	-4.21%
Other Long-Term Liabilities	$1.400M	$1.300M	$4.300M
YoY Change	7.69%	-50.0%	115.0%
Total Long-Term Liabilities	$203.6M	$230.1M	$232.7M
YoY Change	-12.01%	-12.98%	-4.21%
TOTAL LIABILITIES
Total Short-Term Liabilities	$32.40M	$25.62M	$29.99M
Total Long-Term Liabilities	$203.6M	$230.1M	$232.7M
Total Liabilities	$346.4M	$482.5M	$494.3M
YoY Change	-28.84%	-8.65%	-4.99%
SHAREHOLDERS EQUITY
Retained Earnings		$32.52M	$38.06M
YoY Change		-19.7%	-13.4%
Common Stock		$211.0K	$211.0K
YoY Change		1.93%	1.93%
Preferred Stock
YoY Change
Treasury Stock (at cost)		$2.899M	$2.855M
YoY Change		8.45%	8.47%
Treasury Stock Shares		175.4K shares	171.6K shares
Shareholders Equity	$445.7M	$468.4M	$472.8M
YoY Change
Total Liabilities & Shareholders Equity	$792.1M	$955.2M	$971.5M
YoY Change	-17.07%	-4.9%	-2.73%

Cashflow Statement

Concept	2017	2016 Q4	2016 Q3
OPERATING ACTIVITIES
Net Income	-$28.16M	-$5.648M	-$560.0K
YoY Change	252.98%	56.02%	-165.04%
Depreciation, Depletion And Amortization	$45.74M	$11.34M	$12.52M
YoY Change	-7.26%	-6.67%	2.73%
Cash From Operating Activities	$20.10M	$12.02M	$17.92M
YoY Change	-65.65%	39.44%	18.6%
INVESTING ACTIVITIES
Capital Expenditures	$16.77M	-$28.49M	-$5.600M
YoY Change	-57.22%	122.75%	-26.32%
Acquisitions	$0.00
YoY Change
Other Investing Activities	-$761.0K	$22.65M	$480.0K
YoY Change	5.26%	173.55%	-97.16%
Cash From Investing Activities	-$6.574M	-$5.840M	-$5.120M
YoY Change	-27.89%	29.49%	-155.05%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net	$52.00K
YoY Change	-67.7%
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	-$27.50M	-6.800M	-20.08M
YoY Change	-16.64%	96.53%	-27.14%
NET CHANGE
Cash From Operating Activities	$20.10M	12.02M	17.92M
Cash From Investing Activities	-$6.574M	-5.840M	-5.120M
Cash From Financing Activities	-$27.50M	-6.800M	-20.08M
Net Change In Cash	-$13.89M	-620.0K	-7.280M
YoY Change	-185.95%	-195.38%	131.11%
FREE CASH FLOW
Cash From Operating Activities	$20.10M	$12.02M	$17.92M
Capital Expenditures	$16.77M	-$28.49M	-$5.600M
Free Cash Flow	$3.326M	$40.51M	$23.52M
YoY Change	-82.77%	89.21%	3.57%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
CY2017	dei	Amendment Flag AmendmentFlag	false
CY2017	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
CY2017	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	FY
CY2017	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2017
CY2017	dei	Document Period End Date DocumentPeriodEndDate	2017-12-31
CY2017	dei	Document Type DocumentType	10-K
CY2017	dei	Entity Central Index Key EntityCentralIndexKey	0001525221
CY2018Q1	dei	Entity Common Stock Shares Outstanding EntityCommonStockSharesOutstanding	21319150	shares
CY2017	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
CY2017	dei	Entity Filer Category EntityFilerCategory	Accelerated Filer
CY2017Q2	dei	Entity Public Float EntityPublicFloat	187657092	USD
CY2017	dei	Entity Registrant Name EntityRegistrantName	ERA GROUP INC.
CY2017	dei	Entity Voluntary Filers EntityVoluntaryFilers	No
CY2017	dei	Entity Well Known Seasoned Issuer EntityWellKnownSeasonedIssuer	No
CY2015	era	Adjustmentto Additional Paidin Capital Proceedsand Income Tax Effectfrom Sharebased Compensation Net AdjustmenttoAdditionalPaidinCapitalProceedsandIncomeTaxEffectfromSharebasedCompensationNet	-127000	USD
CY2016	era	Adjustmentto Additional Paidin Capital Proceedsand Income Tax Effectfrom Sharebased Compensation Net AdjustmenttoAdditionalPaidinCapitalProceedsandIncomeTaxEffectfromSharebasedCompensationNet	-216000	USD
CY2017	era	Adjustmentto Additional Paidin Capital Proceedsand Income Tax Effectfrom Sharebased Compensation Net AdjustmenttoAdditionalPaidinCapitalProceedsandIncomeTaxEffectfromSharebasedCompensationNet	0	USD
CY2016	era	Aircraft Maintenance Credits Amount Utilizedforthe Period AircraftMaintenanceCreditsAmountUtilizedforthePeriod	5000000	USD
CY2017	era	Aircraft Maintenance Credits Amount Utilizedforthe Period AircraftMaintenanceCreditsAmountUtilizedforthePeriod	1700000	USD
CY2016Q4	era	Buildings And Leasehold Improvements Gross BuildingsAndLeaseholdImprovementsGross	44177000	USD
CY2017Q4	era	Buildings And Leasehold Improvements Gross BuildingsAndLeaseholdImprovementsGross	43839000	USD
CY2015	era	Business Acquisition Pro Forma Net Income Loss Adjustment BusinessAcquisitionProFormaNetIncomeLossAdjustment	377000	USD
CY2015	era	Business Acquisition Pro Forma Revenue Adjustment BusinessAcquisitionProFormaRevenueAdjustment	35789000	USD
CY2015	era	Cash Inflow And Outflow From Notes Receivable CashInflowAndOutflowFromNotesReceivable	52000	USD
CY2016	era	Cash Inflow And Outflow From Notes Receivable CashInflowAndOutflowFromNotesReceivable	208000	USD
CY2017	era	Cash Inflow And Outflow From Notes Receivable CashInflowAndOutflowFromNotesReceivable	169000	USD
CY2016Q4	era	Deferred Gains And Other Liabilities DeferredGainsAndOtherLiabilities	1301000	USD
CY2017Q4	era	Deferred Gains And Other Liabilities DeferredGainsAndOtherLiabilities	1434000	USD
CY2015	era	Deferred Revenue Elimination Dueto Consolidation DeferredRevenueEliminationDuetoConsolidation	42132000	USD
CY2016Q4	era	Deferred Tax Liabilities Other Buyinon Maintenance Programs DeferredTaxLiabilitiesOtherBuyinonMaintenancePrograms	1443000	USD
CY2017Q4	era	Deferred Tax Liabilities Other Buyinon Maintenance Programs DeferredTaxLiabilitiesOtherBuyinonMaintenancePrograms	655000	USD
CY2017	era	Defined Contribution Plan Percentof Employees Gross Pay DefinedContributionPlanPercentofEmployeesGrossPay	0.03
CY2017Q4	era	Deposits Paidon Options Not Yet Exercised DepositsPaidonOptionsNotYetExercised	1300000	USD
CY2015	era	Effective Income Tax Rate Reconciliation Business Acquisition Percent EffectiveIncomeTaxRateReconciliationBusinessAcquisitionPercent	0.160
CY2016	era	Effective Income Tax Rate Reconciliation Business Acquisition Percent EffectiveIncomeTaxRateReconciliationBusinessAcquisitionPercent	0.000
CY2017	era	Effective Income Tax Rate Reconciliation Business Acquisition Percent EffectiveIncomeTaxRateReconciliationBusinessAcquisitionPercent	0.000
CY2016Q4	era	Escrow Deposit Deposit To Like Kind Exchange Escrow Accounts EscrowDepositDepositToLikeKindExchangeEscrowAccounts	3800000	USD
CY2017Q4	era	Escrow Deposit Deposit To Like Kind Exchange Escrow Accounts EscrowDepositDepositToLikeKindExchangeEscrowAccounts	3300000	USD
CY2016Q4	era	Furniture Fixtures Vehicles And Other Gross FurnitureFixturesVehiclesAndOtherGross	22497000	USD
CY2017Q4	era	Furniture Fixtures Vehicles And Other Gross FurnitureFixturesVehiclesAndOtherGross	26001000	USD
CY2016Q4	era	Helicopters Gross HelicoptersGross	947804000	USD
CY2017Q4	era	Helicopters Gross HelicoptersGross	824122000	USD
CY2015	era	Income Before Equity In Earnings Of50 Or Less Owned Companies IncomeBeforeEquityInEarningsOf50OrLessOwnedCompanies	9842000	USD
CY2016	era	Income Before Equity In Earnings Of50 Or Less Owned Companies IncomeBeforeEquityInEarningsOf50OrLessOwnedCompanies	-16002000	USD
CY2017	era	Income Before Equity In Earnings Of50 Or Less Owned Companies IncomeBeforeEquityInEarningsOf50OrLessOwnedCompanies	-30040000	USD
CY2015	era	Income Lossfrom Equity Method Investments Including Gain Losson Sale IncomeLossfromEquityMethodInvestmentsIncludingGainLossonSale	-1943000	USD
CY2016	era	Income Lossfrom Equity Method Investments Including Gain Losson Sale IncomeLossfromEquityMethodInvestmentsIncludingGainLossonSale	1092000	USD
CY2017	era	Income Lossfrom Equity Method Investments Including Gain Losson Sale IncomeLossfromEquityMethodInvestmentsIncludingGainLossonSale	1425000	USD
CY2015	era	Increase Decreasein Accounts Payable Accruedliabilitiesand Other Liabilities IncreaseDecreaseinAccountsPayableAccruedliabilitiesandOtherLiabilities	-14266000	USD
CY2016	era	Increase Decreasein Accounts Payable Accruedliabilitiesand Other Liabilities IncreaseDecreaseinAccountsPayableAccruedliabilitiesandOtherLiabilities	5861000	USD
CY2017	era	Increase Decreasein Accounts Payable Accruedliabilitiesand Other Liabilities IncreaseDecreaseinAccountsPayableAccruedliabilitiesandOtherLiabilities	6273000	USD
CY2016Q4	era	Intercompany Payables IntercompanyPayables	0	USD
CY2017Q4	era	Intercompany Payables IntercompanyPayables	0	USD
CY2016Q4	era	Intercompany Receivables IntercompanyReceivables	0	USD
CY2017Q4	era	Intercompany Receivables IntercompanyReceivables	0	USD
CY2015	era	Interest Paidto Others Net InterestPaidtoOthersNet	12642000	USD
CY2016	era	Interest Paidto Others Net InterestPaidtoOthersNet	15268000	USD
CY2016Q4	era	Investments At Equity And Advances To Fifty Percent Or Less Owned Companies InvestmentsAtEquityAndAdvancesToFiftyPercentOrLessOwnedCompanies	29266000	USD
CY2017Q4	era	Investments At Equity And Advances To Fifty Percent Or Less Owned Companies InvestmentsAtEquityAndAdvancesToFiftyPercentOrLessOwnedCompanies	30056000	USD
CY2017Q4	era	Lessee Leasing Arrangements Numberof Helicopters Leased LesseeLeasingArrangementsNumberofHelicoptersLeased	4	helicopter
CY2015	era	Net Income Loss Availableto Unvested Common Stockholders Basic NetIncomeLossAvailabletoUnvestedCommonStockholdersBasic	-121000	USD
CY2016	era	Net Income Loss Availableto Unvested Common Stockholders Basic NetIncomeLossAvailabletoUnvestedCommonStockholdersBasic	0	USD
CY2017	era	Net Income Loss Availableto Unvested Common Stockholders Basic NetIncomeLossAvailabletoUnvestedCommonStockholdersBasic	0	USD
CY2015	era	Net Income Loss Availableto Vested Common Stockholders Basic NetIncomeLossAvailabletoVestedCommonStockholdersBasic	8584000	USD
CY2016	era	Net Income Loss Availableto Vested Common Stockholders Basic NetIncomeLossAvailabletoVestedCommonStockholdersBasic	-7978000	USD
CY2017	era	Net Income Loss Availableto Vested Common Stockholders Basic NetIncomeLossAvailabletoVestedCommonStockholdersBasic	-28161000	USD
CY2015	era	Net Income Loss Including Portion Attributableto Noncontrolling Interest Excluding Portion Attributable To Temporary Equity NetIncomeLossIncludingPortionAttributabletoNoncontrollingInterestExcludingPortionAttributableToTemporaryEquity	8329000	USD
CY2016	era	Net Income Loss Including Portion Attributableto Noncontrolling Interest Excluding Portion Attributable To Temporary Equity NetIncomeLossIncludingPortionAttributabletoNoncontrollingInterestExcludingPortionAttributableToTemporaryEquity	-14327000	USD
CY2017	era	Net Income Loss Including Portion Attributableto Noncontrolling Interest Excluding Portion Attributable To Temporary Equity NetIncomeLossIncludingPortionAttributabletoNoncontrollingInterestExcludingPortionAttributableToTemporaryEquity	-28161000	USD
CY2015	era	Payments For Proceeds From Derivative Instrument Operating Activities PaymentsForProceedsFromDerivativeInstrumentOperatingActivities	356000	USD
CY2016	era	Payments For Proceeds From Derivative Instrument Operating Activities PaymentsForProceedsFromDerivativeInstrumentOperatingActivities	0	USD
CY2017	era	Payments For Proceeds From Derivative Instrument Operating Activities PaymentsForProceedsFromDerivativeInstrumentOperatingActivities	0	USD
CY2015	era	Payments On Long Term Debt And Capital Lease Obligations PaymentsOnLongTermDebtAndCapitalLeaseObligations	57925000	USD
CY2016	era	Payments On Long Term Debt And Capital Lease Obligations PaymentsOnLongTermDebtAndCapitalLeaseObligations	40444000	USD
CY2017	era	Payments On Long Term Debt And Capital Lease Obligations PaymentsOnLongTermDebtAndCapitalLeaseObligations	45281000	USD
CY2015	era	Proceedsfrom Depositsto Acquire Property Plantand Equipment ProceedsfromDepositstoAcquirePropertyPlantandEquipment	0	USD
CY2016	era	Proceedsfrom Depositsto Acquire Property Plantand Equipment ProceedsfromDepositstoAcquirePropertyPlantandEquipment	544000	USD
CY2017	era	Proceedsfrom Depositsto Acquire Property Plantand Equipment ProceedsfromDepositstoAcquirePropertyPlantandEquipment	0	USD
CY2015	era	Repaymentof Intercompany Debt Financing Activities RepaymentofIntercompanyDebtFinancingActivities	0	USD
CY2016	era	Repaymentof Intercompany Debt Financing Activities RepaymentofIntercompanyDebtFinancingActivities	0	USD
CY2017	era	Repaymentof Intercompany Debt Financing Activities RepaymentofIntercompanyDebtFinancingActivities	0	USD
CY2015	era	Repaymentof Intercompany Debt Investing Activities RepaymentofIntercompanyDebtInvestingActivities	0	USD
CY2016	era	Repaymentof Intercompany Debt Investing Activities RepaymentofIntercompanyDebtInvestingActivities	0	USD
CY2015	era	Saleof Property Plantand Equipmentwith Notes Issued SaleofPropertyPlantandEquipmentwithNotesIssued	1248000	USD
CY2016	era	Saleof Property Plantand Equipmentwith Notes Issued SaleofPropertyPlantandEquipmentwithNotesIssued	0	USD
CY2017	era	Saleof Property Plantand Equipmentwith Notes Issued SaleofPropertyPlantandEquipmentwithNotesIssued	0	USD
CY2015	era	Settlementof Accrued Contingent Liabilities Through Installment Obligations SettlementofAccruedContingentLiabilitiesThroughInstallmentObligations	0	USD
CY2017	era	Settlementof Accrued Contingent Liabilities Through Installment Obligations SettlementofAccruedContingentLiabilitiesThroughInstallmentObligations	386000	USD
CY2017	era	Sharebased Compensation Arrangementby Sharebased Payment Award Options Vestedand Expectedto Vest Forfeituresin Period Exercisable Number SharebasedCompensationArrangementbySharebasedPaymentAwardOptionsVestedandExpectedtoVestForfeituresinPeriodExercisableNumber	18750	shares
CY2017	era	Sharebased Compensation Arrangementby Sharebased Payment Award Options Vestedand Expectedto Vest Forfeituresin Period Exercisable Weighted Average Exercise Price SharebasedCompensationArrangementbySharebasedPaymentAwardOptionsVestedandExpectedtoVestForfeituresinPeriodExercisableWeightedAverageExercisePrice	29.24
CY2017	era	Sharebased Compensation Arrangementby Sharebased Payment Award Options Vestedand Expectedto Vest Vestedin Period Exercisable Number SharebasedCompensationArrangementbySharebasedPaymentAwardOptionsVestedandExpectedtoVestVestedinPeriodExercisableNumber	48750	shares
CY2017	era	Sharebased Compensation Arrangementby Sharebased Payment Award Options Vestedand Expectedto Vest Vestedin Period Exercisable Weighted Average Exercise Price SharebasedCompensationArrangementbySharebasedPaymentAwardOptionsVestedandExpectedtoVestVestedinPeriodExercisableWeightedAverageExercisePrice	20.84
CY2015	era	Significant Acquisitions And Disposals Number Of Acquisitions SignificantAcquisitionsAndDisposalsNumberOfAcquisitions	8	helicopter
CY2016	era	Significant Acquisitions And Disposals Number Of Acquisitions SignificantAcquisitionsAndDisposalsNumberOfAcquisitions	2	helicopter
CY2017	era	Significant Acquisitions And Disposals Number Of Acquisitions SignificantAcquisitionsAndDisposalsNumberOfAcquisitions	1	helicopter
CY2015	era	Significant Acquisitions And Disposals Number Of Disposals SignificantAcquisitionsAndDisposalsNumberOfDisposals	20	helicopter
CY2016	era	Significant Acquisitions And Disposals Number Of Disposals SignificantAcquisitionsAndDisposalsNumberOfDisposals	9	helicopter
CY2017	era	Significant Acquisitions And Disposals Number Of Disposals SignificantAcquisitionsAndDisposalsNumberOfDisposals	3	helicopter
CY2017	era	Tax Cuts And Jobs Act Of2017 Incomplete Accounting Transition Tax For Accumulated Foreign Earnings Provisional Income Tax Expense TaxCutsAndJobsActOf2017IncompleteAccountingTransitionTaxForAccumulatedForeignEarningsProvisionalIncomeTaxExpense	70000000	USD
CY2017Q4	era	Unrecorded Non Cancellable Unconditional Purchase Obligation Duein Next Twelve Months UnrecordedNonCancellableUnconditionalPurchaseObligationDueinNextTwelveMonths	2800000	USD
CY2017Q4	era	Unrecorded Unconditional Purchase Obligation Balance Sheet Amount Potential Amount To Reduce Liability UnrecordedUnconditionalPurchaseObligationBalanceSheetAmountPotentialAmountToReduceLiability	116200000	USD
CY2017Q4	era	Unrecorded Unconditional Purchase Obligation Balance Sheet Amount Related To Liquidated Damage UnrecordedUnconditionalPurchaseObligationBalanceSheetAmountRelatedToLiquidatedDamage	2600000	USD
CY2015	era	Valuation Allowancesand Reserves Additions Dueto Consolidation ValuationAllowancesandReservesAdditionsDuetoConsolidation	11285000	USD
CY2016	era	Valuation Allowancesand Reserves Additions Dueto Consolidation ValuationAllowancesandReservesAdditionsDuetoConsolidation	0	USD
CY2017	era	Valuation Allowancesand Reserves Additions Dueto Consolidation ValuationAllowancesandReservesAdditionsDuetoConsolidation	0	USD
CY2015	era	Valuation Allowancesand Reserves Additions Dueto Foreign Valuation Allowances ValuationAllowancesandReservesAdditionsDuetoForeignValuationAllowances	125000	USD
CY2016	era	Valuation Allowancesand Reserves Additions Dueto Foreign Valuation Allowances ValuationAllowancesandReservesAdditionsDuetoForeignValuationAllowances	2157000	USD
CY2017	era	Valuation Allowancesand Reserves Additions Dueto Foreign Valuation Allowances ValuationAllowancesandReservesAdditionsDuetoForeignValuationAllowances	7578000	USD
CY2015	era	Valuation Allowancesand Reserves Additionsfor State Valuation Allowance ValuationAllowancesandReservesAdditionsforStateValuationAllowance	434000	USD
CY2016	era	Valuation Allowancesand Reserves Additionsfor State Valuation Allowance ValuationAllowancesandReservesAdditionsforStateValuationAllowance	6768000	USD
CY2017	era	Valuation Allowancesand Reserves Additionsfor State Valuation Allowance ValuationAllowancesandReservesAdditionsforStateValuationAllowance	10010000	USD
CY2016Q4	us-gaap	Accounts And Other Receivables Net Current AccountsAndOtherReceivablesNetCurrent	2716000	USD
CY2017Q4	us-gaap	Accounts And Other Receivables Net Current AccountsAndOtherReceivablesNetCurrent	1623000	USD
CY2016Q4	us-gaap	Accounts Payable And Accrued Liabilities Current AccountsPayableAndAccruedLiabilitiesCurrent	8876000	USD
CY2017Q4	us-gaap	Accounts Payable And Accrued Liabilities Current AccountsPayableAndAccruedLiabilitiesCurrent	16421000	USD
CY2016Q4	us-gaap	Accrual For Taxes Other Than Income Taxes Current AccrualForTaxesOtherThanIncomeTaxesCurrent	1447000	USD
CY2017Q4	us-gaap	Accrual For Taxes Other Than Income Taxes Current AccrualForTaxesOtherThanIncomeTaxesCurrent	1810000	USD
CY2016Q4	us-gaap	Accrued Income Taxes Current AccruedIncomeTaxesCurrent	666000	USD
CY2017Q4	us-gaap	Accrued Income Taxes Current AccruedIncomeTaxesCurrent	28000	USD
CY2016Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	332219000	USD
CY2017Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	299028000	USD
CY2016Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	92000	USD
CY2017Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	110000	USD
CY2016Q4	us-gaap	Additional Paid In Capital AdditionalPaidInCapital	438489000	USD
CY2017Q4	us-gaap	Additional Paid In Capital AdditionalPaidInCapital	443944000	USD
CY2015	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Other Longterm Incentive Plans Requisite Service Period Recognition AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationOtherLongtermIncentivePlansRequisiteServicePeriodRecognition	3723000	USD
CY2016	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Other Longterm Incentive Plans Requisite Service Period Recognition AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationOtherLongtermIncentivePlansRequisiteServicePeriodRecognition	4633000	USD
CY2017	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Other Longterm Incentive Plans Requisite Service Period Recognition AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationOtherLongtermIncentivePlansRequisiteServicePeriodRecognition	4671000	USD
CY2015	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	3700000	USD
CY2016	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	4600000	USD
CY2017	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	4600000	USD
CY2016Q4	us-gaap	Allowance For Doubtful Accounts Receivable Current AllowanceForDoubtfulAccountsReceivableCurrent	1219000	USD
CY2017Q4	us-gaap	Allowance For Doubtful Accounts Receivable Current AllowanceForDoubtfulAccountsReceivableCurrent	1196000	USD
CY2015	us-gaap	Amortization Of Debt Discount Premium AmortizationOfDebtDiscountPremium	246000	USD
CY2016	us-gaap	Amortization Of Debt Discount Premium AmortizationOfDebtDiscountPremium	189000	USD
CY2017	us-gaap	Amortization Of Debt Discount Premium AmortizationOfDebtDiscountPremium	234000	USD
CY2015	us-gaap	Amortization Of Financing Costs AmortizationOfFinancingCosts	1000000	USD
CY2015	us-gaap	Amortization Of Financing Costs AmortizationOfFinancingCosts	1025000	USD
CY2016	us-gaap	Amortization Of Financing Costs AmortizationOfFinancingCosts	1500000	USD
CY2016	us-gaap	Amortization Of Financing Costs AmortizationOfFinancingCosts	1486000	USD
CY2017	us-gaap	Amortization Of Financing Costs AmortizationOfFinancingCosts	1136000	USD
CY2017	us-gaap	Amortization Of Financing Costs AmortizationOfFinancingCosts	1100000	USD
CY2016Q4	us-gaap	Assets Assets	955173000	USD
CY2017Q4	us-gaap	Assets Assets	792097000	USD
CY2016Q4	us-gaap	Assets Current AssetsCurrent	96370000	USD
CY2017Q4	us-gaap	Assets Current AssetsCurrent	82564000	USD
CY2015	us-gaap	Business Acquisitions Pro Forma Net Income Loss BusinessAcquisitionsProFormaNetIncomeLoss	9082000	USD
CY2015	us-gaap	Business Acquisitions Pro Forma Revenue BusinessAcquisitionsProFormaRevenue	317626000	USD
CY2014Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	40867000	USD
CY2015Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	14370000	USD
CY2016Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	26950000	USD
CY2017Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	13583000	USD
CY2015	us-gaap	Cash And Cash Equivalents Period Increase Decrease CashAndCashEquivalentsPeriodIncreaseDecrease	-26497000	USD
CY2016	us-gaap	Cash And Cash Equivalents Period Increase Decrease CashAndCashEquivalentsPeriodIncreaseDecrease	12580000	USD
CY2017	us-gaap	Cash And Cash Equivalents Period Increase Decrease CashAndCashEquivalentsPeriodIncreaseDecrease	-13367000	USD
CY2016Q4	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		USD
CY2017Q4	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		USD
CY2016Q4	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
CY2016Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	60000000	shares
CY2017Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	60000000	shares
CY2016Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	20936636	shares
CY2017Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	21352286	shares
CY2016Q4	us-gaap	Common Stock Value CommonStockValue	211000	USD
CY2017Q4	us-gaap	Common Stock Value CommonStockValue	215000	USD
CY2015	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	8702000	USD
CY2016	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	-7978000	USD
CY2017	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	-28143000	USD
CY2015	us-gaap	Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest	-806000	USD
CY2016	us-gaap	Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest	-6932000	USD
CY2017	us-gaap	Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest	-454000	USD
CY2015	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	7896000	USD
CY2016	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	-14910000	USD
CY2017	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	-28597000	USD
CY2016Q4	us-gaap	Construction In Progress Gross ConstructionInProgressGross	88971000	USD
CY2017Q4	us-gaap	Construction In Progress Gross ConstructionInProgressGross	37605000	USD
CY2015	us-gaap	Costs And Expenses CostsAndExpenses	261630000	USD
CY2016	us-gaap	Costs And Expenses CostsAndExpenses	255384000	USD
CY2017	us-gaap	Costs And Expenses CostsAndExpenses	255274000	USD
CY2015	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	-70000	USD
CY2016	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	17000	USD
CY2017	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	0	USD
CY2015	us-gaap	Current Foreign Tax Expense Benefit CurrentForeignTaxExpenseBenefit	-76000	USD
CY2016	us-gaap	Current Foreign Tax Expense Benefit CurrentForeignTaxExpenseBenefit	1213000	USD
CY2017	us-gaap	Current Foreign Tax Expense Benefit CurrentForeignTaxExpenseBenefit	-3530000	USD
CY2015	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	-83000	USD
CY2016	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	1235000	USD
CY2017	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	-3523000	USD
CY2015	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	63000	USD
CY2016	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	5000	USD
CY2017	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	7000	USD
CY2016Q4	us-gaap	Debt Instrument Fair Value DebtInstrumentFairValue	232278000	USD
CY2017Q4	us-gaap	Debt Instrument Fair Value DebtInstrumentFairValue	204910000	USD
CY2016Q4	us-gaap	Debt Instrument Unamortized Discount DebtInstrumentUnamortizedDiscount	1703000	USD
CY2017Q4	us-gaap	Debt Instrument Unamortized Discount DebtInstrumentUnamortizedDiscount	1469000	USD
CY2015	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	13977000	USD
CY2016	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	-5060000	USD
CY2017	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	-121359000	USD
CY2016Q4	us-gaap	Deferred Finance Costs Net DeferredFinanceCostsNet	2395000	USD
CY2017Q4	us-gaap	Deferred Finance Costs Net DeferredFinanceCostsNet	2067000	USD
CY2015	us-gaap	Deferred Foreign Income Tax Expense Benefit DeferredForeignIncomeTaxExpenseBenefit	-141000	USD
CY2016	us-gaap	Deferred Foreign Income Tax Expense Benefit DeferredForeignIncomeTaxExpenseBenefit	-11000	USD
CY2017	us-gaap	Deferred Foreign Income Tax Expense Benefit DeferredForeignIncomeTaxExpenseBenefit	294000	USD
CY2015	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	14200000	USD
CY2016	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-4592000	USD
CY2017	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-119142000	USD
CY2016Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	244420000	USD
CY2017Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	127250000	USD
CY2014Q4	us-gaap	Deferred Revenue DeferredRevenue	31047000	USD
CY2015Q4	us-gaap	Deferred Revenue DeferredRevenue	0	USD
CY2015	us-gaap	Deferred Revenue Additions DeferredRevenueAdditions	32531000	USD
CY2015	us-gaap	Deferred Revenue Revenue Recognized1 DeferredRevenueRevenueRecognized1	21446000	USD
CY2015	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	364000	USD
CY2016	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	479000	USD
CY2017	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	1923000	USD
CY2016Q4	us-gaap	Deferred Tax Assets Liabilities Net Noncurrent DeferredTaxAssetsLiabilitiesNetNoncurrent	0	USD
CY2017Q4	us-gaap	Deferred Tax Assets Liabilities Net Noncurrent DeferredTaxAssetsLiabilitiesNetNoncurrent	0	USD
CY2016Q4	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	18948000	USD
CY2017Q4	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	20652000	USD
CY2016Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards DeferredTaxAssetsOperatingLossCarryforwards	34674000	USD
CY2017Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards DeferredTaxAssetsOperatingLossCarryforwards	52293000	USD
CY2016Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	2042000	USD
CY2017Q4	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	1539000	USD
CY2016Q4	us-gaap	Deferred Tax Assets Property Plant And Equipment DeferredTaxAssetsPropertyPlantAndEquipment	224000	USD
CY2017Q4	us-gaap	Deferred Tax Assets Property Plant And Equipment DeferredTaxAssetsPropertyPlantAndEquipment	47000	USD
CY2016Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Share Based Compensation Cost DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost	2131000	USD
CY2017Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Share Based Compensation Cost DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost	843000	USD
CY2016Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Reserves DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsReserves	1452000	USD
CY2017Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Reserves DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsReserves	897000	USD
CY2016Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	21575000	USD
CY2017Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	34967000	USD
CY2016Q4	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	225472000	USD
CY2017Q4	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	106598000	USD
CY2016Q4	us-gaap	Deferred Tax Liabilities Noncurrent DeferredTaxLiabilitiesNoncurrent	225472000	USD
CY2017Q4	us-gaap	Deferred Tax Liabilities Noncurrent DeferredTaxLiabilitiesNoncurrent	106598000	USD
CY2016Q4	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	242977000	USD
CY2017Q4	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	126595000	USD
CY2015	us-gaap	Defined Contribution Plan Employer Discretionary Contribution Amount DefinedContributionPlanEmployerDiscretionaryContributionAmount	3200000	USD
CY2016	us-gaap	Defined Contribution Plan Employer Discretionary Contribution Amount DefinedContributionPlanEmployerDiscretionaryContributionAmount	2800000	USD
CY2017	us-gaap	Defined Contribution Plan Employer Discretionary Contribution Amount DefinedContributionPlanEmployerDiscretionaryContributionAmount	2400000	USD
CY2017	us-gaap	Defined Contribution Plan Employer Matching Contribution Percent DefinedContributionPlanEmployerMatchingContributionPercent	0.03
CY2017	us-gaap	Defined Contribution Plan Employer Matching Contribution Percent Of Match DefinedContributionPlanEmployerMatchingContributionPercentOfMatch	1
CY2015	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	47337000	USD
CY2016	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	49315000	USD
CY2017	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	45736000	USD
CY2015	us-gaap	Early Repayment Of Senior Debt EarlyRepaymentOfSeniorDebt	46920000	USD
CY2016	us-gaap	Early Repayment Of Senior Debt EarlyRepaymentOfSeniorDebt	4331000	USD
CY2017	us-gaap	Early Repayment Of Senior Debt EarlyRepaymentOfSeniorDebt	0	USD
CY2015	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.42
CY2016Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-0.19
CY2016Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.09
CY2016Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-0.03
CY2016Q4	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-0.27
CY2016	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-0.39
CY2017Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-0.27
CY2017Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-0.13
CY2017Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-3.91
CY2017Q4	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	2.89
CY2017	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-1.36
CY2015	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.42
CY2016Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-0.19
CY2016Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.09
CY2016Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-0.03
CY2016Q4	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-0.27
CY2016	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-0.39
CY2017Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-0.27
CY2017Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-0.13
CY2017Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-3.91
CY2017Q4	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	2.89
CY2017	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-1.36
CY2015	us-gaap	Effect Of Exchange Rate On Cash And Cash Equivalents EffectOfExchangeRateOnCashAndCashEquivalents	-2120000	USD
CY2016	us-gaap	Effect Of Exchange Rate On Cash And Cash Equivalents EffectOfExchangeRateOnCashAndCashEquivalents	-164000	USD
CY2017	us-gaap	Effect Of Exchange Rate On Cash And Cash Equivalents EffectOfExchangeRateOnCashAndCashEquivalents	81000	USD
CY2015	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.589
CY2016	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.173
CY2017	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.803
CY2015	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.35
CY2016	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.35
CY2017	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.35
CY2015	us-gaap	Effective Income Tax Rate Reconciliation Change In Enacted Tax Rate EffectiveIncomeTaxRateReconciliationChangeInEnactedTaxRate	0.000
CY2016	us-gaap	Effective Income Tax Rate Reconciliation Change In Enacted Tax Rate EffectiveIncomeTaxRateReconciliationChangeInEnactedTaxRate	0.000
CY2017	us-gaap	Effective Income Tax Rate Reconciliation Change In Enacted Tax Rate EffectiveIncomeTaxRateReconciliationChangeInEnactedTaxRate	0.460
CY2015	us-gaap	Effective Income Tax Rate Reconciliation Disposition Of Assets EffectiveIncomeTaxRateReconciliationDispositionOfAssets	0.040
CY2016	us-gaap	Effective Income Tax Rate Reconciliation Disposition Of Assets EffectiveIncomeTaxRateReconciliationDispositionOfAssets	0.000
CY2017	us-gaap	Effective Income Tax Rate Reconciliation Disposition Of Assets EffectiveIncomeTaxRateReconciliationDispositionOfAssets	0.000
CY2015	us-gaap	Effective Income Tax Rate Reconciliation Other Adjustments EffectiveIncomeTaxRateReconciliationOtherAdjustments	0.022
CY2016	us-gaap	Effective Income Tax Rate Reconciliation Other Adjustments EffectiveIncomeTaxRateReconciliationOtherAdjustments	-0.011
CY2017	us-gaap	Effective Income Tax Rate Reconciliation Other Adjustments EffectiveIncomeTaxRateReconciliationOtherAdjustments	-0.006
CY2015	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	-0.001
CY2016	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0.185
CY2017	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0.053
CY2015	us-gaap	Effective Income Tax Rate Reconciliation Tax Settlements Foreign EffectiveIncomeTaxRateReconciliationTaxSettlementsForeign	0.000
CY2016	us-gaap	Effective Income Tax Rate Reconciliation Tax Settlements Foreign EffectiveIncomeTaxRateReconciliationTaxSettlementsForeign	0.000
CY2017	us-gaap	Effective Income Tax Rate Reconciliation Tax Settlements Foreign EffectiveIncomeTaxRateReconciliationTaxSettlementsForeign	0.022
CY2016Q4	us-gaap	Employee Related Liabilities Current EmployeeRelatedLiabilitiesCurrent	8507000	USD
CY2017Q4	us-gaap	Employee Related Liabilities Current EmployeeRelatedLiabilitiesCurrent	8264000	USD
CY2017Q4	us-gaap	Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized	2800000	USD
CY2017	us-gaap	Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized Period For Recognition1 EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1	P1Y8M12D
CY2015	us-gaap	Equity Method Investment Other Than Temporary Impairment EquityMethodInvestmentOtherThanTemporaryImpairment	0	USD
CY2016	us-gaap	Equity Method Investment Other Than Temporary Impairment EquityMethodInvestmentOtherThanTemporaryImpairment	0	USD
CY2017	us-gaap	Equity Method Investment Other Than Temporary Impairment EquityMethodInvestmentOtherThanTemporaryImpairment	0	USD
CY2016Q4	us-gaap	Equity Method Investment Summarized Financial Information Equity EquityMethodInvestmentSummarizedFinancialInformationEquity	1100000	USD
CY2017Q4	us-gaap	Equity Method Investment Summarized Financial Information Equity EquityMethodInvestmentSummarizedFinancialInformationEquity	2900000	USD
CY2016Q4	us-gaap	Equity Method Investments EquityMethodInvestments	29266000	USD
CY2017Q4	us-gaap	Equity Method Investments EquityMethodInvestments	30056000	USD
CY2016Q4	us-gaap	Escrow Deposit EscrowDeposit	3777000	USD
CY2017Q4	us-gaap	Escrow Deposit EscrowDeposit	3250000	USD
CY2015	us-gaap	Excess Tax Benefit From Share Based Compensation Financing Activities ExcessTaxBenefitFromShareBasedCompensationFinancingActivities	1096000	USD
CY2016	us-gaap	Excess Tax Benefit From Share Based Compensation Financing Activities ExcessTaxBenefitFromShareBasedCompensationFinancingActivities	836000	USD
CY2017	us-gaap	Excess Tax Benefit From Share Based Compensation Financing Activities ExcessTaxBenefitFromShareBasedCompensationFinancingActivities	836000	USD
CY2017Q4	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	100000	USD
CY2015	us-gaap	Foreign Currency Transaction Gain Loss Before Tax ForeignCurrencyTransactionGainLossBeforeTax	-2590000	USD
CY2016	us-gaap	Foreign Currency Transaction Gain Loss Before Tax ForeignCurrencyTransactionGainLossBeforeTax	7000	USD
CY2017	us-gaap	Foreign Currency Transaction Gain Loss Before Tax ForeignCurrencyTransactionGainLossBeforeTax	-226000	USD
CY2015	us-gaap	Foreign Currency Transaction Gain Loss Realized ForeignCurrencyTransactionGainLossRealized	-3030000	USD
CY2016	us-gaap	Foreign Currency Transaction Gain Loss Realized ForeignCurrencyTransactionGainLossRealized	96000	USD
CY2017	us-gaap	Foreign Currency Transaction Gain Loss Realized ForeignCurrencyTransactionGainLossRealized	-190000	USD
CY2015	us-gaap	Gain Loss On Derivative Instruments Net Pretax GainLossOnDerivativeInstrumentsNetPretax	-18000	USD
CY2016	us-gaap	Gain Loss On Derivative Instruments Net Pretax GainLossOnDerivativeInstrumentsNetPretax	0	USD
CY2017	us-gaap	Gain Loss On Derivative Instruments Net Pretax GainLossOnDerivativeInstrumentsNetPretax	0	USD
CY2015	us-gaap	Gain Loss On Disposition Of Assets GainLossOnDispositionOfAssets	5953000	USD
CY2016	us-gaap	Gain Loss On Disposition Of Assets GainLossOnDispositionOfAssets	4787000	USD
CY2017	us-gaap	Gain Loss On Disposition Of Assets GainLossOnDispositionOfAssets	4507000	USD
CY2015	us-gaap	Gain Loss On Sale Of Business GainLossOnSaleOfBusiness	12946000	USD
CY2016	us-gaap	Gain Loss On Sale Of Business GainLossOnSaleOfBusiness	0	USD
CY2017	us-gaap	Gain Loss On Sale Of Business GainLossOnSaleOfBusiness	0	USD
CY2015	us-gaap	Gain Loss On Sale Of Derivatives GainLossOnSaleOfDerivatives	-18000	USD
CY2016	us-gaap	Gain Loss On Sale Of Derivatives GainLossOnSaleOfDerivatives	0	USD
CY2017	us-gaap	Gain Loss On Sale Of Derivatives GainLossOnSaleOfDerivatives	0	USD
CY2015	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	1617000	USD
CY2016	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	518000	USD
CY2017	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	0	USD
CY2015	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	42812000	USD
CY2016	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	36206000	USD
CY2017	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	42092000	USD
CY2015	us-gaap	Goodwill Impairment Loss GoodwillImpairmentLoss	1900000	USD
CY2015	us-gaap	Goodwill Impairment Loss GoodwillImpairmentLoss	1866000	USD
CY2016	us-gaap	Goodwill Impairment Loss GoodwillImpairmentLoss	0	USD
CY2017	us-gaap	Goodwill Impairment Loss GoodwillImpairmentLoss	117018000	USD
CY2015	us-gaap	Impairment Of Long Lived Assets Held For Use ImpairmentOfLongLivedAssetsHeldForUse	0	USD
CY2017	us-gaap	Impairment Of Long Lived Assets Held For Use ImpairmentOfLongLivedAssetsHeldForUse	117000000	USD
CY2017	us-gaap	Income Loss From Continuing Operations Before Income Taxes Domestic IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic	-148248000	USD
CY2015	us-gaap	Income Loss From Continuing Operations Before Income Taxes Domestic IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic	27699000	USD
CY2016	us-gaap	Income Loss From Continuing Operations Before Income Taxes Domestic IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic	-12913000	USD
CY2015	us-gaap	Income Loss From Continuing Operations Before Income Taxes Foreign IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign	-3740000	USD
CY2016	us-gaap	Income Loss From Continuing Operations Before Income Taxes Foreign IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign	-6446000	USD
CY2017	us-gaap	Income Loss From Continuing Operations Before Income Taxes Foreign IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign	-4457000	USD
CY2015	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	23959000	USD
CY2016	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	-19359000	USD
CY2017	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	-152705000	USD
CY2015	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	-1943000	USD
CY2016	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	1092000	USD
CY2017	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	1425000	USD
CY2015	us-gaap	Income Loss From Subsidiaries Net Of Tax IncomeLossFromSubsidiariesNetOfTax	0	USD
CY2016	us-gaap	Income Loss From Subsidiaries Net Of Tax IncomeLossFromSubsidiariesNetOfTax	0	USD
CY2017	us-gaap	Income Loss From Subsidiaries Net Of Tax IncomeLossFromSubsidiariesNetOfTax	0	USD
CY2015	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	14117000	USD
CY2016	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-3357000	USD
CY2017	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-122665000	USD
CY2015	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	5960000	USD
CY2016	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	-5978000	USD
CY2016Q4	us-gaap	Income Taxes Receivable IncomeTaxesReceivable	3461000	USD
CY2017Q4	us-gaap	Income Taxes Receivable IncomeTaxesReceivable	2829000	USD
CY2015	us-gaap	Increase Decrease In Prepaid Deferred Expense And Other Assets IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets	-6328000	USD
CY2016	us-gaap	Increase Decrease In Prepaid Deferred Expense And Other Assets IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets	-9058000	USD
CY2017	us-gaap	Increase Decrease In Prepaid Deferred Expense And Other Assets IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets	-3320000	USD
CY2015	us-gaap	Increase Decrease In Receivables IncreaseDecreaseInReceivables	9079000	USD
CY2016	us-gaap	Increase Decrease In Receivables IncreaseDecreaseInReceivables	-13516000	USD
CY2017	us-gaap	Increase Decrease In Receivables IncreaseDecreaseInReceivables	4889000	USD
CY2015	us-gaap	Increase Decrease In Restricted Cash IncreaseDecreaseInRestrictedCash	191000	USD
CY2016	us-gaap	Increase Decrease In Restricted Cash IncreaseDecreaseInRestrictedCash	3658000	USD
CY2017	us-gaap	Increase Decrease In Restricted Cash IncreaseDecreaseInRestrictedCash	-527000	USD
CY2017Q4	us-gaap	Indefinite Lived Intangible Assets Excluding Goodwill IndefiniteLivedIntangibleAssetsExcludingGoodwill	1100000	USD
CY2016Q4	us-gaap	Intangible Assets Net Excluding Goodwill IntangibleAssetsNetExcludingGoodwill	1137000	USD
CY2017Q4	us-gaap	Intangible Assets Net Excluding Goodwill IntangibleAssetsNetExcludingGoodwill	1122000	USD
CY2015	us-gaap	Interest Costs Capitalized InterestCostsCapitalized	6100000	USD
CY2016	us-gaap	Interest Costs Capitalized InterestCostsCapitalized	100000	USD
CY2017	us-gaap	Interest Costs Capitalized InterestCostsCapitalized	500000	USD
CY2015	us-gaap	Interest Expense InterestExpense	13526000	USD
CY2016	us-gaap	Interest Expense InterestExpense	17325000	USD
CY2017	us-gaap	Interest Expense InterestExpense	16763000	USD
CY2015	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	0	USD
CY2016Q4	us-gaap	Interest Payable Current InterestPayableCurrent	529000	USD
CY2017Q4	us-gaap	Interest Payable Current InterestPayableCurrent	606000	USD
CY2016Q4	us-gaap	Inventory Net InventoryNet	25417000	USD
CY2017Q4	us-gaap	Inventory Net InventoryNet	21112000	USD
CY2015	us-gaap	Investment Income Interest InvestmentIncomeInterest	1191000	USD
CY2016	us-gaap	Investment Income Interest InvestmentIncomeInterest	741000	USD
CY2017	us-gaap	Investment Income Interest InvestmentIncomeInterest	760000	USD
CY2016Q4	us-gaap	Investments In Affiliates Subsidiaries Associates And Joint Ventures InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures	0	USD
CY2017Q4	us-gaap	Investments In Affiliates Subsidiaries Associates And Joint Ventures InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures	0	USD
CY2015	us-gaap	Lease And Rental Expense LeaseAndRentalExpense	4500000	USD
CY2016	us-gaap	Lease And Rental Expense LeaseAndRentalExpense	5700000	USD
CY2017	us-gaap	Lease And Rental Expense LeaseAndRentalExpense	5500000	USD
CY2016Q4	us-gaap	Liabilities Liabilities	482535000	USD
CY2017Q4	us-gaap	Liabilities Liabilities	342650000	USD
CY2016Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	955173000	USD
CY2017Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	792097000	USD
CY2016Q4	us-gaap	Liabilities Current LiabilitiesCurrent	25623000	USD
CY2017Q4	us-gaap	Liabilities Current LiabilitiesCurrent	32444000	USD
CY2016Q4	us-gaap	Liability For Uncertain Tax Positions Current LiabilityForUncertainTaxPositionsCurrent	1237000	USD
CY2017Q4	us-gaap	Liability For Uncertain Tax Positions Current LiabilityForUncertainTaxPositionsCurrent	859000	USD
CY2016Q4	us-gaap	Long Term Debt LongTermDebt	236376000	USD
CY2017Q4	us-gaap	Long Term Debt LongTermDebt	208446000	USD
CY2016Q4	us-gaap	Long Term Debt Current LongTermDebtCurrent	2139000	USD
CY2017Q4	us-gaap	Long Term Debt Current LongTermDebtCurrent	2736000	USD
CY2017Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal After Year Five LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive	73000	USD
CY2017Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Next Twelve Months LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths	2736000	USD
CY2017Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Five LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive	145143000	USD
CY2017Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Four LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour	355000	USD
CY2017Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Three LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree	18696000	USD
CY2017Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Two LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo	41443000	USD
CY2016Q4	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	230139000	USD
CY2017Q4	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	202174000	USD
CY2016Q4	us-gaap	Machinery And Equipment Gross MachineryAndEquipmentGross	50579000	USD
CY2017Q4	us-gaap	Machinery And Equipment Gross MachineryAndEquipmentGross	41375000	USD
CY2015	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-46026000	USD
CY2016	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-32986000	USD
CY2017	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-27497000	USD
CY2015	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-22807000	USD
CY2016	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-12774000	USD
CY2017	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-6047000	USD
CY2015	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	44456000	USD
CY2016	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	58504000	USD
CY2017	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	20096000	USD
CY2015	us-gaap	Net Income Loss NetIncomeLoss	8705000	USD
CY2016	us-gaap	Net Income Loss NetIncomeLoss	-7978000	USD
CY2017	us-gaap	Net Income Loss NetIncomeLoss	-28161000	USD
CY2015	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	-806000	USD
CY2016	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	-6932000	USD
CY2017	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	-454000	USD
CY2015	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	8705000	USD
CY2016Q1	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	-3818000	USD
CY2016Q2	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	1938000	USD
CY2016Q3	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	-560000	USD
CY2016Q4	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	-5538000	USD
CY2017Q1	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	-5620000	USD
CY2017Q2	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	-2787000	USD
CY2017Q3	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	-81448000	USD
CY2017Q4	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	61694000	USD
CY2015	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	-335000	USD
CY2016	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	-15990000	USD
CY2017	us-gaap	Nonoperating Income Expense NonoperatingIncomeExpense	-16241000	USD
CY2015	us-gaap	Notes Issued1 NotesIssued1	0	USD
CY2017	us-gaap	Notes Issued1 NotesIssued1	0	USD
CY2015	us-gaap	Operating Costs And Expenses OperatingCostsAndExpenses	171481000	USD
CY2016	us-gaap	Operating Costs And Expenses OperatingCostsAndExpenses	169863000	USD
CY2017	us-gaap	Operating Costs And Expenses OperatingCostsAndExpenses	167446000	USD
CY2015	us-gaap	Operating Income Loss OperatingIncomeLoss	24294000	USD
CY2016Q1	us-gaap	Operating Income Loss OperatingIncomeLoss	-805000	USD
CY2016Q2	us-gaap	Operating Income Loss OperatingIncomeLoss	-3509000	USD
CY2016Q3	us-gaap	Operating Income Loss OperatingIncomeLoss	2366000	USD
CY2016Q4	us-gaap	Operating Income Loss OperatingIncomeLoss	-1421000	USD
CY2016	us-gaap	Operating Income Loss OperatingIncomeLoss	-3369000	USD
CY2017Q1	us-gaap	Operating Income Loss OperatingIncomeLoss	-5056000	USD
CY2017Q2	us-gaap	Operating Income Loss OperatingIncomeLoss	-276000	USD
CY2017Q3	us-gaap	Operating Income Loss OperatingIncomeLoss	-122773000	USD
CY2017Q4	us-gaap	Operating Income Loss OperatingIncomeLoss	-8359000	USD
CY2017	us-gaap	Operating Income Loss OperatingIncomeLoss	-136464000	USD
CY2017Q4	us-gaap	Operating Leases Future Minimum Payments Due Current OperatingLeasesFutureMinimumPaymentsDueCurrent	1172000	USD
CY2017Q4	us-gaap	Operating Leases Future Minimum Payments Due In Five Years OperatingLeasesFutureMinimumPaymentsDueInFiveYears	488000	USD
CY2017Q4	us-gaap	Operating Leases Future Minimum Payments Due In Four Years OperatingLeasesFutureMinimumPaymentsDueInFourYears	811000	USD
CY2017Q4	us-gaap	Operating Leases Future Minimum Payments Due In Three Years OperatingLeasesFutureMinimumPaymentsDueInThreeYears	1090000	USD
CY2017Q4	us-gaap	Operating Leases Future Minimum Payments Due In Two Years OperatingLeasesFutureMinimumPaymentsDueInTwoYears	1190000	USD
CY2017Q4	us-gaap	Operating Leases Future Minimum Payments Due Thereafter OperatingLeasesFutureMinimumPaymentsDueThereafter	10244000	USD
CY2016Q4	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	6591000	USD
CY2017Q4	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	4441000	USD
CY2015	us-gaap	Other Comprehensive Income Foreign Currency Transaction And Translation Gain Loss Arising During Period Net Of Tax OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationGainLossArisingDuringPeriodNetOfTax	-3000	USD
CY2017	us-gaap	Other Comprehensive Income Foreign Currency Transaction And Translation Gain Loss Arising During Period Net Of Tax OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationGainLossArisingDuringPeriodNetOfTax	18000	USD
CY2015	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Before Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentBeforeTax	-4000	USD
CY2016	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Before Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentBeforeTax	0	USD
CY2017	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Before Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentBeforeTax	18000	USD
CY2015	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-3000	USD
CY2016	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	0	USD
CY2017	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	18000	USD
CY2015	us-gaap	Other Comprehensive Income Loss Tax OtherComprehensiveIncomeLossTax	-1000	USD
CY2016	us-gaap	Other Comprehensive Income Loss Tax OtherComprehensiveIncomeLossTax	0	USD
CY2017	us-gaap	Other Comprehensive Income Loss Tax OtherComprehensiveIncomeLossTax	0	USD
CY2016Q4	us-gaap	Other Liabilities Current OtherLiabilitiesCurrent	2222000	USD
CY2017Q4	us-gaap	Other Liabilities Current OtherLiabilitiesCurrent	1720000	USD
CY2015	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	45000	USD
CY2016	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	69000	USD
CY2017	us-gaap	Other Nonoperating Income Expense OtherNonoperatingIncomeExpense	-12000	USD
CY2015	us-gaap	Payments For Derivative Instrument Investing Activities PaymentsForDerivativeInstrumentInvestingActivities	1103000	USD
CY2016	us-gaap	Payments For Derivative Instrument Investing Activities PaymentsForDerivativeInstrumentInvestingActivities	0	USD
CY2017	us-gaap	Payments For Derivative Instrument Investing Activities PaymentsForDerivativeInstrumentInvestingActivities	0	USD
CY2015	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	-688000	USD
CY2016	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	-723000	USD
CY2017	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	-761000	USD
CY2015	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	2079000	USD
CY2016	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	161000	USD
CY2017	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	52000	USD
CY2015	us-gaap	Payments Of Debt Issuance Costs PaymentsOfDebtIssuanceCosts	71000	USD
CY2016	us-gaap	Payments Of Debt Issuance Costs PaymentsOfDebtIssuanceCosts	886000	USD
CY2017	us-gaap	Payments Of Debt Issuance Costs PaymentsOfDebtIssuanceCosts	0	USD
CY2015	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	127000	USD
CY2016	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	0	USD
CY2017	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	0	USD
CY2015	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	1747000	USD
CY2016	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	0	USD
CY2017	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	0	USD
CY2015	us-gaap	Payments To Acquire Equity Method Investments PaymentsToAcquireEquityMethodInvestments	36000	USD
CY2016	us-gaap	Payments To Acquire Equity Method Investments PaymentsToAcquireEquityMethodInvestments	0	USD
CY2017	us-gaap	Payments To Acquire Equity Method Investments PaymentsToAcquireEquityMethodInvestments	126000	USD
CY2015	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	60050000	USD
CY2016	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	39200000	USD
CY2017	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	16770000	USD
CY2016Q4	us-gaap	Prepaid Expense Current PrepaidExpenseCurrent	1579000	USD
CY2017Q4	us-gaap	Prepaid Expense Current PrepaidExpenseCurrent	1203000	USD
CY2015	us-gaap	Proceeds From Divestiture Of Interest In Consolidated Subsidiaries ProceedsFromDivestitureOfInterestInConsolidatedSubsidiaries	14252000	USD
CY2016	us-gaap	Proceeds From Divestiture Of Interest In Consolidated Subsidiaries ProceedsFromDivestitureOfInterestInConsolidatedSubsidiaries	0	USD
CY2017	us-gaap	Proceeds From Divestiture Of Interest In Consolidated Subsidiaries ProceedsFromDivestitureOfInterestInConsolidatedSubsidiaries	0	USD
CY2015	us-gaap	Proceeds From Long Term Lines Of Credit ProceedsFromLongTermLinesOfCredit	60000000	USD
CY2016	us-gaap	Proceeds From Long Term Lines Of Credit ProceedsFromLongTermLinesOfCredit	12000000	USD
CY2017	us-gaap	Proceeds From Long Term Lines Of Credit ProceedsFromLongTermLinesOfCredit	17000000	USD
CY2015	us-gaap	Proceeds From Sale Of Property Plant And Equipment ProceedsFromSaleOfPropertyPlantAndEquipment	25328000	USD
CY2016	us-gaap	Proceeds From Sale Of Property Plant And Equipment ProceedsFromSaleOfPropertyPlantAndEquipment	28609000	USD
CY2017	us-gaap	Proceeds From Sale Of Property Plant And Equipment ProceedsFromSaleOfPropertyPlantAndEquipment	9392000	USD
CY2015	us-gaap	Profit Loss ProfitLoss	7899000	USD
CY2016Q1	us-gaap	Profit Loss ProfitLoss	-3950000	USD
CY2016Q2	us-gaap	Profit Loss ProfitLoss	-4510000	USD
CY2016Q3	us-gaap	Profit Loss ProfitLoss	-802000	USD
CY2016Q4	us-gaap	Profit Loss ProfitLoss	-5648000	USD
CY2016	us-gaap	Profit Loss ProfitLoss	-14910000	USD
CY2017Q1	us-gaap	Profit Loss ProfitLoss	-5787000	USD
CY2017Q2	us-gaap	Profit Loss ProfitLoss	-3072000	USD
CY2017Q3	us-gaap	Profit Loss ProfitLoss	-81215000	USD
CY2017Q4	us-gaap	Profit Loss ProfitLoss	61459000	USD
CY2017	us-gaap	Profit Loss ProfitLoss	-28615000	USD
CY2016Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	1154028000	USD
CY2017Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	972942000	USD
CY2016Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	821809000	USD
CY2017Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	673914000	USD
CY2015	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	1058000	USD
CY2016	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	441000	USD
CY2017	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	144000	USD
CY2016Q4	us-gaap	Receivables Net Current ReceivablesNetCurrent	32470000	USD
CY2017Q4	us-gaap	Receivables Net Current ReceivablesNetCurrent	38964000	USD
CY2016	us-gaap	Reclassifications Of Temporary To Permanent Equity ReclassificationsOfTemporaryToPermanentEquity	6349000	USD
CY2016Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	32524000	USD
CY2017Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	4363000	USD
CY2015	us-gaap	Revenues Revenues	281837000	USD
CY2016Q1	us-gaap	Revenues Revenues	62582000	USD
CY2016Q2	us-gaap	Revenues Revenues	63351000	USD
CY2016Q3	us-gaap	Revenues Revenues	65006000	USD
CY2016Q4	us-gaap	Revenues Revenues	56289000	USD
CY2016	us-gaap	Revenues Revenues	247228000	USD
CY2017Q1	us-gaap	Revenues Revenues	54527000	USD
CY2017Q2	us-gaap	Revenues Revenues	57878000	USD
CY2017Q3	us-gaap	Revenues Revenues	61385000	USD
CY2017Q4	us-gaap	Revenues Revenues	57531000	USD
CY2017	us-gaap	Revenues Revenues	231321000	USD
CY2015	us-gaap	Share Based Compensation ShareBasedCompensation	3723000	USD
CY2016	us-gaap	Share Based Compensation ShareBasedCompensation	4633000	USD
CY2017	us-gaap	Share Based Compensation ShareBasedCompensation	4623000	USD
CY2016	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercises In Period Total Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue	0	USD
CY2017	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Expirations In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExpirationsInPeriod	13384	shares
CY2017	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Forfeitures In Period ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresInPeriod	25000	shares
CY2017	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Gross ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross	0	shares
CY2016Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	283764	shares
CY2017Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	245380	shares
CY2016Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	19.54
CY2017Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	18.71
CY2017Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Vested And Expected To Vest Exercisable Aggregate Intrinsic Value ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableAggregateIntrinsicValue	200000	USD
CY2016Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Vested And Expected To Vest Exercisable Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableNumber	213764	shares
CY2017Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Vested And Expected To Vest Exercisable Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableNumber	230380	shares
CY2016Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Vested And Expected To Vest Exercisable Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableWeightedAverageExercisePrice	18.84
CY2017Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Vested And Expected To Vest Exercisable Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableWeightedAverageExercisePrice	18.54
CY2017	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Expirations In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExpirationsInPeriodWeightedAverageExercisePrice	16.74
CY2017	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Forfeitures In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsForfeituresInPeriodWeightedAverageExercisePrice	29.24
CY2016Q4	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Nonvested Number Of Shares SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedNumberOfShares	70000	shares
CY2017Q4	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Nonvested Number Of Shares SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedNumberOfShares	15000	shares
CY2017	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Nonvested Options Forfeited Number Of Shares SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedOptionsForfeitedNumberOfShares	6250	shares
CY2017	us-gaap	Stock Issued During Period Value Employee Stock Purchase Plan StockIssuedDuringPeriodValueEmployeeStockPurchasePlan	836000	USD
CY2015	us-gaap	Stock Issued During Period Value Restricted Stock Award Forfeitures StockIssuedDuringPeriodValueRestrictedStockAwardForfeitures	0	USD
CY2016	us-gaap	Stock Issued During Period Value Restricted Stock Award Forfeitures StockIssuedDuringPeriodValueRestrictedStockAwardForfeitures	0	USD
CY2017	us-gaap	Stock Issued During Period Value Share Based Compensation Forfeited StockIssuedDuringPeriodValueShareBasedCompensationForfeited	48000	USD
CY2017	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Nonvested Options Forfeited Weighted Average Grant Date Fair Value SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedOptionsForfeitedWeightedAverageGrantDateFairValue	10.86
CY2016Q4	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Nonvested Weighted Average Grant Date Fair Value SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedWeightedAverageGrantDateFairValue	7.94
CY2017Q4	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Nonvested Weighted Average Grant Date Fair Value SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedWeightedAverageGrantDateFairValue	7.04
CY2017	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Vested Number Of Shares SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedNumberOfShares	48750	shares
CY2014Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	460364000	USD
CY2017	us-gaap	Sharebased Compensation Arrangement By Sharebased Payment Award Options Vested Weighted Average Grant Date Fair Value SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedWeightedAverageGrantDateFairValue	7.84
CY2015	us-gaap	Stock Issued During Period Value Employee Stock Purchase Plan StockIssuedDuringPeriodValueEmployeeStockPurchasePlan	1096000	USD
CY2016	us-gaap	Stock Issued During Period Value Employee Stock Purchase Plan StockIssuedDuringPeriodValueEmployeeStockPurchasePlan	836000	USD
CY2015Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	471303000	USD
CY2016Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	468417000	USD
CY2017Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	445681000	USD
CY2016Q4	us-gaap	Temporary Equity Carrying Amount Including Portion Attributable To Noncontrolling Interests TemporaryEquityCarryingAmountIncludingPortionAttributableToNoncontrollingInterests	4221000	USD
CY2017Q4	us-gaap	Temporary Equity Carrying Amount Including Portion Attributable To Noncontrolling Interests TemporaryEquityCarryingAmountIncludingPortionAttributableToNoncontrollingInterests	3766000	USD
CY2016Q4	us-gaap	Treasury Stock Shares TreasuryStockShares	175350	shares
CY2017Q4	us-gaap	Treasury Stock Shares TreasuryStockShares	215141	shares
CY2016Q4	us-gaap	Treasury Stock Value TreasuryStockValue	2899000	USD
CY2017Q4	us-gaap	Treasury Stock Value TreasuryStockValue	2951000	USD
CY2015	us-gaap	Treasury Stock Value Acquired Cost Method TreasuryStockValueAcquiredCostMethod	2079000	USD
CY2016	us-gaap	Treasury Stock Value Acquired Cost Method TreasuryStockValueAcquiredCostMethod	161000	USD
CY2017	us-gaap	Treasury Stock Value Acquired Cost Method TreasuryStockValueAcquiredCostMethod	52000	USD
CY2014Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	0	USD
CY2015Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	648000	USD
CY2016Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	261000	USD
CY2017Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	11000	USD
CY2015	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Settlements With Taxing Authorities UnrecognizedTaxBenefitsDecreasesResultingFromSettlementsWithTaxingAuthorities	0	USD
CY2016	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Settlements With Taxing Authorities UnrecognizedTaxBenefitsDecreasesResultingFromSettlementsWithTaxingAuthorities	570000	USD
CY2017	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Settlements With Taxing Authorities UnrecognizedTaxBenefitsDecreasesResultingFromSettlementsWithTaxingAuthorities	250000	USD
CY2017Q4	us-gaap	Unrecognized Tax Benefits Income Tax Penalties And Interest Accrued UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestAccrued	100000	USD
CY2015	us-gaap	Unrecognized Tax Benefits Increases Resulting From Acquisition UnrecognizedTaxBenefitsIncreasesResultingFromAcquisition	648000	USD
CY2016	us-gaap	Unrecognized Tax Benefits Increases Resulting From Acquisition UnrecognizedTaxBenefitsIncreasesResultingFromAcquisition	0	USD
CY2017	us-gaap	Unrecognized Tax Benefits Increases Resulting From Acquisition UnrecognizedTaxBenefitsIncreasesResultingFromAcquisition	0	USD
CY2015	us-gaap	Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions	0	USD
CY2016	us-gaap	Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions	183000	USD
CY2017	us-gaap	Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions	0	USD
CY2017Q4	us-gaap	Unrecorded Unconditional Purchase Obligation Balance On First Anniversary UnrecordedUnconditionalPurchaseObligationBalanceOnFirstAnniversary	106400000	USD
CY2017Q4	us-gaap	Unrecorded Unconditional Purchase Obligation Balance Sheet Amount UnrecordedUnconditionalPurchaseObligationBalanceSheetAmount	117700000	USD
CY2014Q4	us-gaap	Valuation Allowances And Reserves Balance ValuationAllowancesAndReservesBalance	806000	USD
CY2015Q4	us-gaap	Valuation Allowances And Reserves Balance ValuationAllowancesAndReservesBalance	12650000	USD
CY2016Q4	us-gaap	Valuation Allowances And Reserves Balance ValuationAllowancesAndReservesBalance	21575000	USD
CY2017Q4	us-gaap	Valuation Allowances And Reserves Balance ValuationAllowancesAndReservesBalance	34967000	USD
CY2015	us-gaap	Valuation Allowances And Reserves Deductions ValuationAllowancesAndReservesDeductions	0	USD
CY2016	us-gaap	Valuation Allowances And Reserves Deductions ValuationAllowancesAndReservesDeductions	0	USD
CY2017	us-gaap	Valuation Allowances And Reserves Deductions ValuationAllowancesAndReservesDeductions	-4196000	USD
CY2015	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	20270756	shares
CY2016	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	20350066	shares
CY2017	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	20760530	shares
CY2015	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	20228370	shares
CY2016	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	20350066	shares
CY2017	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	20760530	shares
CY2017	us-gaap	Write Off Of Deferred Debt Issuance Cost WriteOffOfDeferredDebtIssuanceCost	500000	USD
CY2017	us-gaap	Concentration Risk Credit Risk ConcentrationRiskCreditRisk	<div style="font-family:Times New Roman;font-size:10pt;"><div style="line-height:120%;padding-bottom:8px;text-align:justify;text-indent:48px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-style:italic;font-weight:bold;">Concentrations of Credit Risk</font><font style="font-family:inherit;font-size:10pt;">. The Company is exposed to concentrations of credit risk relating to its receivables due from customers in the industries described above. The Company does not generally require collateral or other security to support its outstanding receivables. The Company minimizes its credit risk relating to receivables by performing ongoing credit evaluations. The Company is also exposed to concentrations of credit risk associated with cash and cash equivalents. The Company minimizes its credit risk relating to these positions by monitoring the financial condition of the financial institutions and counterparties involved and by primarily conducting business with large, well-established financial institutions and diversifying its counterparties. </font></div></div>
CY2017	us-gaap	Use Of Estimates UseOfEstimates	<div style="font-family:Times New Roman;font-size:10pt;"><div style="line-height:120%;padding-bottom:8px;text-align:justify;text-indent:48px;font-size:10pt;"><font style="font-family:inherit;font-size:10pt;font-style:italic;font-weight:bold;">Use of Estimates</font><font style="font-family:inherit;font-size:10pt;">. The preparation of financial statements in conformity with accounting principles generally accepted in the U.S. (“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 periods. Such estimates include, among other items, those related to allowance for doubtful accounts, useful lives of property and equipment, inventories, income tax provisions, impairments, fair values used in purchase price allocations and certain accrued and contingent liabilities. Actual results could differ from those estimates and those differences may be material.</font></div></div>

Files In Submission

Name	View Source	Status
0001525221-18-000014-index-headers.html	Edgar Link	pending
0001525221-18-000014-index.html	Edgar Link	pending
0001525221-18-000014.txt	Edgar Link	pending
0001525221-18-000014-xbrl.zip	Edgar Link	pending
a201710-k.htm	Edgar Link	pending
chart-68081e861d3f5227b3f.jpg	Edgar Link	pending
era-20171231.xml	Edgar Link	completed
era-20171231.xsd	Edgar Link	pending
era-20171231_cal.xml	Edgar Link	unprocessable
era-20171231_def.xml	Edgar Link	unprocessable
era-20171231_lab.xml	Edgar Link	unprocessable
era-20171231_pre.xml	Edgar Link	unprocessable
exhibit1016amendmentno4.htm	Edgar Link	pending
exhibit1016amendmentno4001.jpg	Edgar Link	pending
exhibit1016amendmentno4002.jpg	Edgar Link	pending
exhibit1016amendmentno4003.jpg	Edgar Link	pending
exhibit1016amendmentno4004.jpg	Edgar Link	pending
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exhibit1016amendmentno4011.jpg	Edgar Link	pending
exhibit211subsidiaries-2017.htm	Edgar Link	pending
exhibit231eyconsent10-kx20.htm	Edgar Link	pending
exhibit232kpmgconsent10-kx.htm	Edgar Link	pending
exhibit311ceocertification.htm	Edgar Link	pending
exhibit312cfocertification.htm	Edgar Link	pending
exhibit321ceosoxcertificat.htm	Edgar Link	pending
exhibit322cfosoxcertificat.htm	Edgar Link	pending
FilingSummary.xml	Edgar Link	unprocessable
Financial_Report.xlsx	Edgar Link	pending
kpmglogo.jpg	Edgar Link	pending
R1.htm	Edgar Link	pending
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$VTOL
Bristow Group Inc. Stock $vtol

2017 Form 10-K Financial Statement

#000152522118000014 Filed on March 09, 2018

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$VTOL Bristow Group Inc. Stock $vtol

2017 Form 10-K Financial Statement

#000152522118000014 Filed on March 09, 2018

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$VTOL
Bristow Group Inc. Stock $vtol