Loans and Leases and the Allowance for Credit Losses - Schedule of Activity in Allowance by Portfolio Segment (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Allowance for Credit Losses:
Balance at Beginning of Period	$ 148,512	$ 180,385	$ 157,821	$ 216,252
Loans and Leases Charged-Off	(2,865)	(3,445)	(10,119)	(14,045)
Recoveries on Loans and Leases Previously Charged-Off	1,718	2,252	6,855	8,752
Net Loans and Leases Recovered (Charged-Off)	(1,147)	(1,193)	(3,264)	(5,293)
Provision for Credit Losses	(929)	(11,272)	(8,121)	(43,039)
Balance at End of Period	146,436	167,920	146,436	167,920
Commercial
Allowance for Credit Losses:
Balance at Beginning of Period	61,826	78,639	64,950	84,847
Loans and Leases Charged-Off	(147)	(196)	(729)	(900)
Recoveries on Loans and Leases Previously Charged-Off	45	118	465	374
Net Loans and Leases Recovered (Charged-Off)	(102)	(78)	(264)	(526)
Provision for Credit Losses	157	(9,894)	(2,805)	(15,654)
Balance at End of Period	61,881	68,667	61,881	68,667
Consumer
Allowance for Credit Losses:
Balance at Beginning of Period	86,686	101,746	92,871	131,405
Loans and Leases Charged-Off	(2,718)	(3,249)	(9,390)	(13,145)
Recoveries on Loans and Leases Previously Charged-Off	1,673	2,134	6,390	8,378
Net Loans and Leases Recovered (Charged-Off)	(1,045)	(1,115)	(3,000)	(4,767)
Provision for Credit Losses	(1,086)	(1,378)	(5,316)	(27,385)
Balance at End of Period	$ 84,555	$ 99,253	$ 84,555	$ 99,253