Derivatives - Effect of Derivative Instruments on Statements of Operations (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Effect of derivative instruments on results of operations
Total amount of interest expense in which the effects of cash flow hedges are recorded	$ 108,135	$ 105,716	$ 104,681
Derivatives Designated as Hedging Instruments | Interest Rate Swaps
Effect of derivative instruments on results of operations
Pre-tax gain (loss) recognized in other comprehensive income (loss)	(1,219)	(8,459)	(6,785)
Derivatives Designated as Hedging Instruments | Interest Rate Swaps | Interest expense
Effect of derivative instruments on results of operations
Pre-tax gain (loss) reclassified from accumulated other comprehensive income (loss) into interest expense	(6,308)	$ (3,878)	$ 2,278
Derivatives Not Designated as Hedging Instruments | Interest Rate Swaps | Interest expense
Effect of derivative instruments on results of operations
Gain recognized in interest expense	$ 1,088