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, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Allowance for Credit Losses:
Balance at Beginning of Period	$ 152,028	$ 198,343	$ 157,821	$ 216,252
Loans and Leases Charged-Off	(3,346)	(4,309)	(7,254)	(10,600)
Recoveries on Loans and Leases Previously Charged-Off	2,715	3,125	5,137	6,500
Net Loans and Leases Recovered (Charged-Off)	(631)	(1,184)	(2,117)	(4,100)
Provision for Credit Losses	(2,885)	(16,774)	(7,192)	(31,767)
Balance at End of Period	148,512	180,385	148,512	180,385
Commercial
Allowance for Credit Losses:
Balance at Beginning of Period	62,093	82,811	64,950	84,847
Loans and Leases Charged-Off	(233)	(456)	(582)	(704)
Recoveries on Loans and Leases Previously Charged-Off	51	144	420	256
Net Loans and Leases Recovered (Charged-Off)	(182)	(312)	(162)	(448)
Provision for Credit Losses	(85)	(3,860)	(2,962)	(5,760)
Balance at End of Period	61,826	78,639	61,826	78,639
Consumer
Allowance for Credit Losses:
Balance at Beginning of Period	89,935	115,532	92,871	131,405
Loans and Leases Charged-Off	(3,113)	(3,853)	(6,672)	(9,896)
Recoveries on Loans and Leases Previously Charged-Off	2,664	2,981	4,717	6,244
Net Loans and Leases Recovered (Charged-Off)	(449)	(872)	(1,955)	(3,652)
Provision for Credit Losses	(2,800)	(12,914)	(4,230)	(26,007)
Balance at End of Period	$ 86,686	$ 101,746	$ 86,686	$ 101,746