Derivative Financial Instruments - Changes in Net Loss on Cash Flow Hedges Included in Accumulated Other Comprehensive Income (Loss) (Details) - Interest Rate Swap - Cash Flow Hedging - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Changes in Net Gain or Loss on Cash Flow Hedges Included in Accumulated Other Comprehensive Income (Loss)
Balance at the beginning of the period	$ (13,034)	$ (19,612)	$ (16,771)	$ (10,137)
Unrealized loss recognized in other comprehensive income, net of tax	(646)	(455)	(829)	(12,518)
Reclassification to interest expense, net	1,967	1,997	5,887	4,585
Balance at the end of the period	$ (11,713)	$ (18,070)	$ (11,713)	$ (18,070)