Loans and Allowance for Credit Losses Activity in the Allowance for Credit Losses (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Jan. 01, 2020
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	$ 277,567
Beginning balance	291,940	$ 166,209	$ 169,410
Loans charged off	30,952	30,557
Loans charged off			(53,189)
Recoveries of loans previously charged off	17,146	21,020
Recoveries of loans previously charged off			17,163
Net loans recovered (charged off)	(13,806)	(9,537)
Net loans recovered (charged off)			(36,026)
Provision for credit losses	(14,600)	76,920
Provision for credit losses	(14,600)	76,920	32,825
Ending balance	263,534	291,940	166,209
Increase in ACL	263,534	291,940	166,209
Cumulative Effect, Period of Adoption, Adjustment
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance		58,348
Ending balance			58,348
Increase in ACL			58,348
Off-Balance Sheet
Allowance for Loan and Lease Losses [Roll Forward]
Beginning balance	14,400	2,600
Provision for credit losses	200	(800)	(6,300)
Ending balance	14,500	14,400	2,600
Increase in ACL	$ 14,500	$ 14,400	$ 2,600
Off-Balance Sheet | Cumulative Effect, Period of Adoption, Adjustment
Allowance for Loan and Lease Losses [Roll Forward]
Increase in ACL				$ 12,600