Loans and Leases and the Allowance for Credit Losses - Schedule of Activity in Allowance by Portfolio Segment (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Allowance for Credit Losses:
Balance at Beginning of Period	$ 144,439	$ 157,821
Loans and Leases Charged-Off	(4,309)	(3,908)
Recoveries on Loans and Leases Previously Charged-Off	1,641	2,422
Net Loans and Leases Recovered (Charged-Off)	(2,668)	(1,486)
Provision for Credit Losses	1,806	(4,307)
Balance at End of Period	143,577	152,028
Commercial
Allowance for Credit Losses:
Balance at Beginning of Period	63,900	64,950
Loans and Leases Charged-Off	(261)	(349)
Recoveries on Loans and Leases Previously Charged-Off	50	369
Net Loans and Leases Recovered (Charged-Off)	(211)	20
Provision for Credit Losses	(4,918)	(2,877)
Balance at End of Period	58,771	62,093
Consumer
Allowance for Credit Losses:
Balance at Beginning of Period	80,539	92,871
Loans and Leases Charged-Off	(4,048)	(3,559)
Recoveries on Loans and Leases Previously Charged-Off	1,591	2,053
Net Loans and Leases Recovered (Charged-Off)	(2,457)	(1,506)
Provision for Credit Losses	6,724	(1,430)
Balance at End of Period	$ 84,806	$ 89,935