Allowance for Credit Losses - Activity in ACL by Class of Loans and Leases (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Rollforward of the Allowance for Credit Losses
Balance at beginning of year	$ 157,262	$ 208,454	$ 130,530
Charge-offs	(20,888)	(23,623)	(47,563)
Recoveries	9,647	11,150	16,702
Provision	(2,121)	(38,719)	108,015
Balance at end of year	143,900	157,262	208,454
Commercial and Industrial
Rollforward of the Allowance for Credit Losses
Balance at beginning of year	20,080	24,711	28,975
Charge-offs	(2,012)	(5,949)	(15,572)
Recoveries	897	867	5,005
Provision	(4,401)	451	22,408
Balance at end of year	14,564	20,080	24,711
Commercial real estate
Rollforward of the Allowance for Credit Losses
Balance at beginning of year	42,951	58,123	22,325
Charge-offs	(750)	(66)	(2,753)
Recoveries	14	39	615
Provision	1,595	(15,145)	27,377
Balance at end of year	43,810	42,951	58,123
Construction
Rollforward of the Allowance for Credit Losses
Balance at beginning of year	9,773	10,039	4,844
Charge-offs			(379)
Recoveries		266	200
Provision	(3,930)	(532)	7,177
Balance at end of year	5,843	9,773	10,039
Lease financing
Rollforward of the Allowance for Credit Losses
Balance at beginning of year	1,659	3,298	424
Recoveries	60
Provision	(168)	(1,639)	2,667
Balance at end of year	1,551	1,659	3,298
Residential mortgage
Rollforward of the Allowance for Credit Losses
Balance at beginning of year	34,364	40,461	29,303
Charge-offs	(103)	(632)	(14)
Recoveries	418	261	216
Provision	496	(5,726)	13,749
Balance at end of year	35,175	34,364	40,461
Home equity line
Rollforward of the Allowance for Credit Losses
Balance at beginning of year	5,642	7,163	9,876
Charge-offs	(1,175)	(342)	(54)
Recoveries	713	117	167
Provision	3,116	(1,296)	1,905
Balance at end of year	8,296	5,642	7,163
Consumer Portfolio Segment [Member]
Rollforward of the Allowance for Credit Losses
Balance at beginning of year	42,793	64,659	34,644
Charge-offs	(16,848)	(16,634)	(28,791)
Recoveries	7,545	9,600	10,499
Provision	1,171	(14,832)	32,732
Balance at end of year	$ 34,661	$ 42,793	64,659
Unallocated
Rollforward of the Allowance for Credit Losses
Balance at beginning of year			139
ASU No. 2016-13
Rollforward of the Allowance for Credit Losses
Balance at beginning of year			770
ASU No. 2016-13 | Commercial and Industrial
Rollforward of the Allowance for Credit Losses
Balance at beginning of year			(16,105)
ASU No. 2016-13 | Commercial real estate
Rollforward of the Allowance for Credit Losses
Balance at beginning of year			10,559
ASU No. 2016-13 | Construction
Rollforward of the Allowance for Credit Losses
Balance at beginning of year			(1,803)
ASU No. 2016-13 | Lease financing
Rollforward of the Allowance for Credit Losses
Balance at beginning of year			207
ASU No. 2016-13 | Residential mortgage
Rollforward of the Allowance for Credit Losses
Balance at beginning of year			(2,793)
ASU No. 2016-13 | Home equity line
Rollforward of the Allowance for Credit Losses
Balance at beginning of year			(4,731)
ASU No. 2016-13 | Consumer Portfolio Segment [Member]
Rollforward of the Allowance for Credit Losses
Balance at beginning of year			15,575
ASU No. 2016-13 | Unallocated
Rollforward of the Allowance for Credit Losses
Balance at beginning of year			$ (139)