Debt (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Line of Credit Facility
Less: Unamortized original issue discount	$ (6,670)	$ (944)
Less: Unamortized debt issuance cost	(29,665)	(3,099)
Capital leases	744	706
Total debt	1,267,353	511,942
Less: current portion	(13,969)	(6,867)
Total long-term portion of debt	1,253,384	505,075
Notes Payable, Other Payables \| Note payable secured by royalty interest
Line of Credit Facility
Total	25,410	24,740
Notes Payable, Other Payables \| Customer note payable
Line of Credit Facility
Total	286	745
Notes Payable, Other Payables \| Equipment notes payable
Line of Credit Facility
Total	448	719
Revolving Line-of-Credit \| Revolver
Line of Credit Facility
Total	$ 0	$ 0
Credit facility, interest rate	8.00%	5.75%
Senior Secured Credit Facility \| Term loan facility
Line of Credit Facility
Total	$ 1,276,800	$ 489,075
Credit facility, interest rate	6.13%
Senior Secured Credit Facility \| Term loan facility \| Minimum
Line of Credit Facility
Credit facility, interest rate		4.75%
Senior Secured Credit Facility \| Term loan facility \| Maximum
Line of Credit Facility
Credit facility, interest rate		5.25%

Amount equal to the present value (the principal) at the beginning of the lease term of minimum lease payments during the lease term (excluding that portion of the payments representing executory costs such as insurance, maintenance, and taxes to be paid by the lessor, together with any profit thereon) net of payments or other amounts applied to the principal through the balance sheet date.

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Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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