Related Party Transactions (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015		Jun. 23, 2015
Related Party Transaction [Line Items]
Long-term debt	$ 3,415,759	$ 3,429,351	[1]
Equity Funds | Principal Owner
Related Party Transaction [Line Items]
Investment in loan fund limited partnership, fair value		30,000
Senior Secured Credit Agreement | Term Loan Facility
Related Party Transaction [Line Items]
Long-term debt	2,316,178	2,328,092	[1]	$ 3,479,000
Senior Secured Credit Agreement | Term Loan Facility | Principal Owner
Related Party Transaction [Line Items]
Long-term debt	$ 31,000	$ 38,000

[1] (1) December 31, 2015 balances have been reclassified to present debt issuance costs as a direct deduction from the carrying amount of an associated debt liability in accordance with ASU 2015-03. See Note 1 for further information.