Commitments and Contingencies (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Guarantor Obligations [Line Items]
Amortization Method Qualified Affordable Housing Project Investments	$ 156,600	$ 163,900
FDIC shared-loss payable	0	15,601	$ 112,395
Commitments to Extend Credit
Guarantor Obligations [Line Items]
Unused Commitments to Extend Credit	13,011,154	12,098,417
Amortization Method Qualified Affordable Housing Project Investments	43,400	53,700
Standby Letters of Credit
Guarantor Obligations [Line Items]
Affordable Housing Program Obligation	$ 116,648	$ 129,819