Debt - Debt Issuance Costs (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Debt Disclosure [Abstract]
Non-cash interest expense	$ 12,025	$ 12,542	$ 14,100
Deferred financing costs	8,607	513	$ 81,097
Unamortized balances of deferred financing costs	$ 66,069	$ 88,241