Derivative Financial Instruments - Balance Sheet Location (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Derivatives, Fair Value [Line Items]
Derivative liability	$ (39,086)	$ (18,108)
Interest rate swaps | Derivatives not designated as hedging instruments:
Derivatives, Fair Value [Line Items]
Derivative liability	(39,086)	(23,237)
Other accrued liabilities | Interest rate swaps
Derivatives, Fair Value [Line Items]
Derivative liability		(5,100)
Other accrued liabilities | Interest rate swaps | Derivatives not designated as hedging instruments:
Derivatives, Fair Value [Line Items]
Derivative liability	0	(5,129)
Derivative Liability | Interest rate swaps | Derivatives not designated as hedging instruments:
Derivatives, Fair Value [Line Items]
Derivative liability	$ (39,086)	$ (18,108)