Accumulated Other Comprehensive (Loss) Income - Reclassifications out of AOCI (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Reclassifications out of accumulated other comprehensive income, net of tax
Interest expense	$ (11,463)	$ (24,946)	$ (42,352)	$ (62,740)
Provision for income taxes	(30,821)	(23,233)	(100,464)	(2,741)
Net income	122,788	95,221	368,697	34,396
Amount Reclassified from Accumulated Other Comprehensive Loss
Reclassifications out of accumulated other comprehensive income, net of tax
Net income	(49)	2,685	(76)	4,780
Gains and Losses on Cash Flow Hedges | Amount Reclassified from Accumulated Other Comprehensive Loss | Interest rate contracts
Reclassifications out of accumulated other comprehensive income, net of tax
Interest expense		3,457		6,143
Provision for income taxes		(760)		(1,351)
Net income		2,697		4,792
Unrealized Gains and Losses on Securities Available for Sale | Amount Reclassified from Accumulated Other Comprehensive Loss
Reclassifications out of accumulated other comprehensive income, net of tax
Securities gains (losses), net	(64)	(15)	(100)	(15)
Provision for income taxes	15	3	24	3
Net income	$ (49)	$ (12)	$ (76)	$ (12)