Derivative Instruments - Changes in consolidated statements of comprehensive income related to interest rate derivatives (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Interest rate swaps designated as cash flow hedges:
Unrealized gain (loss) recognized in accumulated other comprehensive income before reclassifications	$ 3,986	$ 515	$ 20,871	$ 5,875
Amounts reclassified from accumulated other comprehensive income	(249)	921	1,026	2,796
Income tax (expense) benefit on items recognized in accumulated other comprehensive income	(835)	(321)	(4,892)	(1,918)
Unrealized gains on interest rate swaps, net of tax	$ 2,902	$ 1,115	$ 17,005	$ 6,753