Fair Value of Financial Instruments - Schedule of Fair Value Valuation of Financial Instruments (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Assets
Derivative asset		$ 31,043
Total		31,043
Liabilities
Derivative liability	$ 19,117
Contingent consideration	18,522	83,401
Total	5,050,246	4,567,465
Prices with Other Observable Inputs (Level 2)
Assets
Derivative asset		31,043
Total		31,043
Liabilities
Derivative liability	19,117
Total	5,031,724	4,484,064
Prices with Unobservable Inputs (Level 3)
Liabilities
Contingent consideration	18,522	83,401
Total	18,522	83,401
Senior Secured Term Loan B Facility
Liabilities
Senior secured loan	1,998,748	1,877,303
Senior Secured Term Loan B Facility \| Prices with Other Observable Inputs (Level 2)
Liabilities
Senior secured loan	1,998,748	1,877,303
6.00% Senior Secured Notes
Liabilities
Senior notes	521,125	504,625
6.00% Senior Secured Notes \| Prices with Other Observable Inputs (Level 2)
Liabilities
Senior notes	521,125	504,625
8.25% Senior Unsecured Notes
Liabilities
Senior notes	1,026,750	965,700
8.25% Senior Unsecured Notes \| Prices with Other Observable Inputs (Level 2)
Liabilities
Senior notes	1,026,750	965,700
7.125% Senior Unsecured Notes
Liabilities
Senior notes	535,500	496,500
7.125% Senior Unsecured Notes \| Prices with Other Observable Inputs (Level 2)
Liabilities
Senior notes	535,500	496,500
Senior Secured Revolving Credit Facility
Liabilities
Senior secured loan	574,961	639,936
Senior Secured Revolving Credit Facility \| Prices with Other Observable Inputs (Level 2)
Liabilities
Senior secured loan	574,961	$ 639,936
Exchangeable Senior Notes - 4.00%, due June 15, 2024
Liabilities
Senior notes	355,523
Exchangeable Senior Notes - 4.00%, due June 15, 2024 \| Prices with Other Observable Inputs (Level 2)
Liabilities
Senior notes	$ 355,523

Fair value portion of probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

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