Loans and Leases and the Allowance for Credit Losses - Schedule of Activity in Allowance by Portfolio Segment (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Allowance for Credit Losses:
Balance at Beginning of Period	$ 143,577	$ 152,028	$ 144,439	$ 157,821
Loans and Leases Charged-Off	(3,511)	(3,346)	(7,820)	(7,254)
Recoveries on Loans and Leases Previously Charged-Off	2,134	2,715	3,775	5,137
Net Loans and Leases Recovered (Charged-Off)	(1,377)	(631)	(4,045)	(2,117)
Provision for Credit Losses	3,167	(2,885)	4,973	(7,192)
Balance at End of Period	145,367	148,512	145,367	148,512
Commercial
Allowance for Credit Losses:
Balance at Beginning of Period	58,771	62,093	63,900	64,950
Loans and Leases Charged-Off	(203)	(233)	(464)	(582)
Recoveries on Loans and Leases Previously Charged-Off	103	51	153	420
Net Loans and Leases Recovered (Charged-Off)	(100)	(182)	(311)	(162)
Provision for Credit Losses	5,270	(85)	352	(2,962)
Balance at End of Period	63,941	61,826	63,941	61,826
Consumer
Allowance for Credit Losses:
Balance at Beginning of Period	84,806	89,935	80,539	92,871
Loans and Leases Charged-Off	(3,308)	(3,113)	(7,356)	(6,672)
Recoveries on Loans and Leases Previously Charged-Off	2,031	2,664	3,622	4,717
Net Loans and Leases Recovered (Charged-Off)	(1,277)	(449)	(3,734)	(1,955)
Provision for Credit Losses	(2,103)	(2,800)	4,621	(4,230)
Balance at End of Period	$ 81,426	$ 86,686	$ 81,426	$ 86,686