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Debt - Interest Expense (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Debt Instrument [Line Items]
Amortization of debt issuance costs			$ 3,147	$ 750
Capital leases			533	458
Other	$ 418	$ 362	658	698
Interest expense	11,844	1,834	22,461	3,410
2017 Term Facility
Debt Instrument [Line Items]
Amortization of debt issuance costs	739	0	1,355	0
Interest expense on borrowings	9,288	0	16,636	0
Revolving Facility
Debt Instrument [Line Items]
Amortization of debt issuance costs	184	0	338	0
Commitment fees	187	0	334	0
Amended Credit Facility | Credit Facility
Debt Instrument [Line Items]
Amortization of debt issuance costs	0	22	748	44
Commitment fees	0	44	25	118
Interest expense on borrowings	0	392	24	523
2019 Notes
Debt Instrument [Line Items]
Amortization of debt issuance costs	353	353	706	706
Interest expense on borrowings	432	432	863	863
Additional Interest Expense on Default	0	0	288	0
Capital leases	$ 243	$ 229	$ 486	$ 458

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Amount of amortization expense attributable to debt issuance costs.

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Amount of commitment fees for the unused borrowing capacity under the long-term financing arrangement that is available to the entity.

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Amount of the cost of borrowed funds accounted for as interest expense.

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The amount, during the lease term, of each minimum [capital] lease payment allocated to interest expense so as to produce a constant periodic rate of interest on the remaining balance of the capital lease obligation.

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Amount of interest expense classified as other.

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