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
	Mar. 31, 2022	Mar. 31, 2021
Changes in Net Gain or Loss on Cash Flow Hedges Included in Accumulated Other Comprehensive Income (Loss)
Balance at the beginning of the period	$ (8,504)	$ (16,771)
Unrealized gain recognized in other comprehensive income (loss), net of tax	5,020	529
Reclassification to interest expense, net of tax	1,876	1,983
Balance at the end of the period	$ (1,608)	$ (14,259)