Long-Term Debt - Effects of Interest Rate Swap and Cap Agreements (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Derivative Instruments, Gain (Loss) [Line Items]
Amount of unrealized gains (losses) in OCI on interest rate cap agreements	$ 7,155	$ (16,346)	$ 1,151
Cash Flow Hedging
Derivative Instruments, Gain (Loss) [Line Items]
Amount of unrealized gains (losses) in OCI on interest rate cap agreements	7,155	(16,346)	1,151
Reclassification from accumulated other comprehensive income into net income	4,133	5,313	6,377
Cash Flow Hedging | Related income tax benefit (expense)
Derivative Instruments, Gain (Loss) [Line Items]
Amount of unrealized gains (losses) in OCI on interest rate cap agreements	(2,377)	5,435	(415)
Reclassification from accumulated other comprehensive income into net income	(1,376)	(1,768)	(2,214)
Cash Flow Hedging | Interest rate cap agreements | Debt Expense
Derivative Instruments, Gain (Loss) [Line Items]
Amount of unrealized gains (losses) in OCI on interest rate cap agreements	9,532	(21,781)	1,566
Reclassification from accumulated other comprehensive income into net income	$ 5,509	$ 7,081	$ 8,591