Fair Value of Financial Instruments - Schedule of Fair Value Valuation of Financial Instruments (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Assets
Derivative asset	$ 42,061	$ 6,793
Total	42,061	6,793
Liabilities
Contingent consideration	89,236	105,762
Total	4,519,941	4,553,521
Prices with Other Observable Inputs (Level 2)
Assets
Derivative asset	42,061	6,793
Total	42,061	6,793
Liabilities
Total	4,430,705	4,447,759
Prices with Unobservable Inputs (Level 3)
Liabilities
Contingent consideration	89,236	105,762
Total	89,236	105,762
Senior Secured Term Loan B Facility
Liabilities
Senior secured loan	2,008,760	2,011,237
Senior Secured Term Loan B Facility \| Prices with Other Observable Inputs (Level 2)
Liabilities
Senior secured loan	2,008,760	2,011,237
6.00% Senior Secured Notes
Liabilities
Senior notes	528,000	540,375
6.00% Senior Secured Notes \| Prices with Other Observable Inputs (Level 2)
Liabilities
Senior notes	528,000	540,375
8.25% Senior Unsecured Notes
Liabilities
Senior notes	1,051,725	1,073,925
8.25% Senior Unsecured Notes \| Prices with Other Observable Inputs (Level 2)
Liabilities
Senior notes	1,051,725	1,073,925
7.125% Senior Unsecured Notes
Liabilities
Senior notes	542,250	542,250
7.125% Senior Unsecured Notes \| Prices with Other Observable Inputs (Level 2)
Liabilities
Senior notes	542,250	542,250
Senior Secured Revolving Credit Facility
Liabilities
Senior secured loan	299,970	279,972
Senior Secured Revolving Credit Facility \| Prices with Other Observable Inputs (Level 2)
Liabilities
Senior secured loan	$ 299,970	$ 279,972

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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-Publisher FASB
-Name Accounting Standards Codification
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Fair value, after the effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes assets not subject to a master netting arrangement and not elected to be offset.

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Fair value portion of contractual arrangement with a lender under which borrowings can be made up to a specific amount at any point in time.

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Fair value portion of notes payable.

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