Debt - Debt Transactions (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Debt Outstanding [Roll Forward]
Beginning long term debt	$ 2,395,507	$ 2,534,768
Additions:
Proceeds from senior notes	750,000	0
Amortization and write-off of deferred financing costs and debt discount	12,967	7,954
Deductions:
Payments on term loan facilities	(507,261)	(147,215)
Payments of deferred financing costs	(18,577)	0
Ending long term debt	$ 2,632,636	$ 2,395,507