Loans, Changes in the Allowance for Loan Losses by Portfolio Segment (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021	Dec. 31, 2021	Dec. 31, 2020
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]
Balance at beginning of period			$ 39,776	$ 47,776	$ 47,776
Provision for credit losses			0		(8,000)
Balance at end of period	$ 39,776		39,776		39,776
Allowance for credit losses on loans
Provision for credit losses	16,998	$ (24,010)	13,006	(82,018)
Allowance for Loan Losses [Member]
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Financing Receivable, Allowance for Credit Loss	292,904		292,904		280,015	$ 383,702
Charge offs			(7,165)		(40,652)
Recoveries			7,054		16,965
Net Charge offs			(111)		(23,687)
Provision for credit losses			13,000		(80,000)
Balance at end of period	292,904		292,904		280,015
Allowance for credit losses on loans
Charge offs			7,165		40,652
Recoveries			7,054		16,965
Net Charge offs			(111)		(23,687)
Allowance for Loan Losses [Member] | PPP
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Financing Receivable, Allowance for Credit Loss	1		1		51	531
Charge offs			0		0
Recoveries			0		0
Net Charge offs			0		0
Provision for credit losses			(50)		(480)
Balance at end of period	1		1		51
Allowance for credit losses on loans
Charge offs			0		0
Recoveries			0		0
Net Charge offs			0		0
Allowance for Loan Losses [Member] | Asset-based lending & equipment finance(a)
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Financing Receivable, Allowance for Credit Loss	5,588		5,588		4,182	2,077
Charge offs			0		0
Recoveries			0		412
Net Charge offs			0		412
Provision for credit losses			1,406		1,693
Balance at end of period	5,588		5,588		4,182
Allowance for credit losses on loans
Charge offs			0		0
Recoveries			0		412
Net Charge offs			0		412
Allowance for Loan Losses [Member] | Commercial and industrial
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Financing Receivable, Allowance for Credit Loss	102,243		102,243		85,624	140,716
Charge offs			(3,644)		(21,564)
Recoveries			4,157		8,152
Net Charge offs			512		(13,412)
Provision for credit losses			16,107		(41,680)
Balance at end of period	102,243		102,243		85,624
Allowance for credit losses on loans
Charge offs			3,644		21,564
Recoveries			4,157		8,152
Net Charge offs			512		(13,412)
Allowance for Loan Losses [Member] | Commercial real estate — owner occupied
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Financing Receivable, Allowance for Credit Loss	8,631		8,631		11,473	11,274
Charge offs			0		0
Recoveries			10		120
Net Charge offs			10		120
Provision for credit losses			(2,852)		80
Balance at end of period	8,631		8,631		11,473
Allowance for credit losses on loans
Charge offs			0		0
Recoveries			10		120
Net Charge offs			10		120
Allowance for Loan Losses [Member] | Commercial and business lending
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Financing Receivable, Allowance for Credit Loss	116,464		116,464		101,330	154,598
Charge offs			(3,644)		(21,564)
Recoveries			4,167		8,684
Net Charge offs			523		(12,880)
Provision for credit losses			14,611		(40,388)
Balance at end of period	116,464		116,464		101,330
Allowance for credit losses on loans
Charge offs			3,644		21,564
Recoveries			4,167		8,684
Net Charge offs			523		(12,880)
Allowance for Loan Losses [Member] | Commercial real estate — investor
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Financing Receivable, Allowance for Credit Loss	60,771		60,771		72,803	93,435
Charge offs			0		(14,346)
Recoveries			0		3,162
Net Charge offs			0		(11,184)
Provision for credit losses			(12,032)		(9,448)
Balance at end of period	60,771		60,771		72,803
Allowance for credit losses on loans
Charge offs			0		14,346
Recoveries			0		3,162
Net Charge offs			0		(11,184)
Allowance for Loan Losses [Member] | Real estate construction
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Financing Receivable, Allowance for Credit Loss	36,419		36,419		37,643	59,193
Charge offs			(48)		(5)
Recoveries			90		126
Net Charge offs			43		121
Provision for credit losses			(1,266)		(21,672)
Balance at end of period	36,419		36,419		37,643
Allowance for credit losses on loans
Charge offs			48		5
Recoveries			90		126
Net Charge offs			43		121
Allowance for Loan Losses [Member] | Commercial real estate lending
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Financing Receivable, Allowance for Credit Loss	97,190		97,190		110,446	152,629
Charge offs			(48)		(14,351)
Recoveries			90		3,288
Net Charge offs			43		(11,063)
Provision for credit losses			(13,299)		(31,120)
Balance at end of period	97,190		97,190		110,446
Allowance for credit losses on loans
Charge offs			48		14,351
Recoveries			90		3,288
Net Charge offs			43		(11,063)
Allowance for Loan Losses [Member] | Total commercial
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Financing Receivable, Allowance for Credit Loss	213,654		213,654		211,776	307,226
Charge offs			(3,692)		(35,915)
Recoveries			4,258		11,972
Net Charge offs			565		(23,943)
Provision for credit losses			1,313		(71,508)
Balance at end of period	213,654		213,654		211,776
Allowance for credit losses on loans
Charge offs			3,692		35,915
Recoveries			4,258		11,972
Net Charge offs			565		(23,943)
Allowance for Loan Losses [Member] | Residential mortgage
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Financing Receivable, Allowance for Credit Loss	38,907		38,907		40,787	42,996
Charge offs			(287)		(880)
Recoveries			752		841
Net Charge offs			465		(38)
Provision for credit losses			(2,345)		(2,170)
Balance at end of period	38,907		38,907		40,787
Allowance for credit losses on loans
Charge offs			287		880
Recoveries			752		841
Net Charge offs			465		(38)
Allowance for Loan Losses [Member] | Auto finance
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Financing Receivable, Allowance for Credit Loss	15,741		15,741		1,999	174
Charge offs			(228)		(22)
Recoveries			53		31
Net Charge offs			(175)		9
Provision for credit losses			13,917		1,816
Balance at end of period	15,741		15,741		1,999
Allowance for credit losses on loans
Charge offs			228		22
Recoveries			53		31
Net Charge offs			(175)		9
Allowance for Loan Losses [Member] | Home equity
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Financing Receivable, Allowance for Credit Loss	14,086		14,086		14,011	18,849
Charge offs			(524)		(668)
Recoveries			1,199		2,854
Net Charge offs			675		2,186
Provision for credit losses			(601)		(7,024)
Balance at end of period	14,086		14,086		14,011
Allowance for credit losses on loans
Charge offs			524		668
Recoveries			1,199		2,854
Net Charge offs			675		2,186
Allowance for Loan Losses [Member] | Other consumer
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Financing Receivable, Allowance for Credit Loss					11,441	14,456
Charge offs					(3,168)
Recoveries					1,267
Net Charge offs					(1,901)
Provision for credit losses					(1,113)
Balance at end of period					11,441
Allowance for credit losses on loans
Charge offs					3,168
Recoveries					1,267
Net Charge offs					(1,901)
Allowance for Loan Losses [Member] | Other consumer
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Financing Receivable, Allowance for Credit Loss	10,516		10,516		11,441
Charge offs			(2,434)
Recoveries			792
Net Charge offs			(1,642)
Provision for credit losses			716
Balance at end of period	10,516		10,516		11,441
Allowance for credit losses on loans
Charge offs			2,434
Recoveries			792
Net Charge offs			(1,642)
Allowance for Loan Losses [Member] | Total consumer
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Financing Receivable, Allowance for Credit Loss	79,250		79,250		68,239	$ 76,475
Charge offs			(3,472)		(4,738)
Recoveries			2,796		4,993
Net Charge offs			(676)		256
Provision for credit losses			11,687		(8,492)
Balance at end of period	79,250		79,250		68,239
Allowance for credit losses on loans
Charge offs			3,472		4,738
Recoveries			2,796		4,993
Net Charge offs			(676)		256
SEC Schedule, 12-09, Reserve, Off-balance Sheet Activity [Member]
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]
Balance at beginning of period			39,776	47,776	47,776
Provision for credit losses			0		(8,000)
Balance at end of period	39,776		39,776		39,776
SEC Schedule, 12-09, Reserve, Off-balance Sheet Activity [Member] | Asset-based lending & equipment finance(a)
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]
Balance at beginning of period			857	901	901
Provision for credit losses			184		(43)
Balance at end of period	1,042		1,042		857
SEC Schedule, 12-09, Reserve, Off-balance Sheet Activity [Member] | Commercial and industrial
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]
Balance at beginning of period			17,601	21,411	21,411
Provision for credit losses			4		(3,809)
Balance at end of period	17,606		17,606		17,601
SEC Schedule, 12-09, Reserve, Off-balance Sheet Activity [Member] | Commercial real estate — owner occupied
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]
Balance at beginning of period			208	266	266
Provision for credit losses			(119)		(58)
Balance at end of period	89		89		208
SEC Schedule, 12-09, Reserve, Off-balance Sheet Activity [Member] | Commercial and business lending
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]
Balance at beginning of period			18,667	22,577	22,577
Provision for credit losses			70		(3,911)
Balance at end of period	18,737		18,737		18,667
SEC Schedule, 12-09, Reserve, Off-balance Sheet Activity [Member] | Commercial real estate — investor
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]
Balance at beginning of period			936	636	636
Provision for credit losses			(303)		300
Balance at end of period	633		633		936
SEC Schedule, 12-09, Reserve, Off-balance Sheet Activity [Member] | Real estate construction
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]
Balance at beginning of period			15,586	18,887	18,887
Provision for credit losses			552		(3,301)
Balance at end of period	16,138		16,138		15,586
SEC Schedule, 12-09, Reserve, Off-balance Sheet Activity [Member] | Commercial real estate lending
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]
Balance at beginning of period			16,522	19,523	19,523
Provision for credit losses			249		(3,001)
Balance at end of period	16,771		16,771		16,522
SEC Schedule, 12-09, Reserve, Off-balance Sheet Activity [Member] | Total commercial
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]
Balance at beginning of period			35,189	42,101	42,101
Provision for credit losses			319		(6,912)
Balance at end of period	35,508		35,508		35,189
SEC Schedule, 12-09, Reserve, Off-balance Sheet Activity [Member] | Home equity
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]
Balance at beginning of period			2,592	3,118	3,118
Provision for credit losses			0		(526)
Balance at end of period	2,592		2,592		2,592
SEC Schedule, 12-09, Reserve, Off-balance Sheet Activity [Member] | Other consumer
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]
Balance at beginning of period			1,995	2,557	2,557
Provision for credit losses			(319)		(563)
Balance at end of period	1,675		1,675		1,995
SEC Schedule, 12-09, Reserve, Off-balance Sheet Activity [Member] | Total consumer
Off-Balance Sheet, Credit Loss, Liability [Roll Forward]
Balance at beginning of period			4,587	5,675	5,675
Provision for credit losses			(319)		(1,088)
Balance at end of period	4,268		4,268		4,587
Allowance for Loans Losses and Unfunded Commitments [Member]
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Charge offs			(7,165)		(40,652)
Recoveries			7,054		16,965
Net Charge offs			(111)		(23,687)
Allowance for credit losses on loans
Balance at beginning of period			319,791	431,478	431,478
Charge offs			7,165		40,652
Recoveries			7,054		16,965
Net Charge offs			(111)		(23,687)
Provision for credit losses			13,000		(88,000)
Balance at end of period	$ 332,680		$ 332,680		$ 319,791
Percent of Loans	1.20%		1.20%		1.32%
Allowance for Loans Losses and Unfunded Commitments [Member] | PPP
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Charge offs			$ 0		$ 0
Recoveries			0		0
Net Charge offs			0		0
Allowance for credit losses on loans
Balance at beginning of period			51	531	531
Charge offs			0		0
Recoveries			0		0
Net Charge offs			0		0
Provision for credit losses			(50)		(480)
Balance at end of period	$ 1		$ 1		$ 51
Percent of Loans	0.10%		0.10%		0.08%
Allowance for Loans Losses and Unfunded Commitments [Member] | Asset-based lending & equipment finance(a)
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Charge offs			$ 0		$ 0
Recoveries			0		412
Net Charge offs			0		412
Allowance for credit losses on loans
Balance at beginning of period			5,040	2,978	2,978
Charge offs			0		0
Recoveries			0		412
Net Charge offs			0		412
Provision for credit losses			1,590		1,649
Balance at end of period	$ 6,630		$ 6,630		$ 5,040
Percent of Loans	1.74%		1.74%		2.83%
Allowance for Loans Losses and Unfunded Commitments [Member] | Commercial and industrial
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Charge offs			$ (3,644)		$ (21,564)
Recoveries			4,157		8,152
Net Charge offs			512		(13,412)
Allowance for credit losses on loans
Balance at beginning of period			103,225	162,126	162,126
Charge offs			3,644		21,564
Recoveries			4,157		8,152
Net Charge offs			512		(13,412)
Provision for credit losses			16,112		(45,490)
Balance at end of period	$ 119,849		$ 119,849		$ 103,225
Percent of Loans	1.30%		1.30%		1.26%
Allowance for Loans Losses and Unfunded Commitments [Member] | Commercial real estate — owner occupied
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Charge offs			$ 0		$ 0
Recoveries			10		120
Net Charge offs			10		120
Allowance for credit losses on loans
Balance at beginning of period			11,681	11,539	11,539
Charge offs			0		0
Recoveries			10		120
Net Charge offs			10		120
Provision for credit losses			(2,971)		22
Balance at end of period	$ 8,721		$ 8,721		$ 11,681
Percent of Loans	0.87%		0.87%		1.20%
Allowance for Loans Losses and Unfunded Commitments [Member] | Commercial and business lending
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Charge offs			$ (3,644)		$ (21,564)
Recoveries			4,167		8,684
Net Charge offs			523		(12,880)
Allowance for credit losses on loans
Balance at beginning of period			119,997	177,175	177,175
Charge offs			3,644		21,564
Recoveries			4,167		8,684
Net Charge offs			523		(12,880)
Provision for credit losses			14,681		(44,299)
Balance at end of period	$ 135,200		$ 135,200		$ 119,997
Percent of Loans	1.28%		1.28%		1.27%
Allowance for Loans Losses and Unfunded Commitments [Member] | Commercial real estate — investor
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Charge offs			$ 0		$ (14,346)
Recoveries			0		3,162
Net Charge offs			0		(11,184)
Allowance for credit losses on loans
Balance at beginning of period			73,739	94,071	94,071
Charge offs			0		14,346
Recoveries			0		3,162
Net Charge offs			0		(11,184)
Provision for credit losses			(12,335)		(9,148)
Balance at end of period	$ 61,404		$ 61,404		$ 73,739
Percent of Loans	1.21%		1.21%		1.68%
Allowance for Loans Losses and Unfunded Commitments [Member] | Real estate construction
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Charge offs			$ (48)		$ (5)
Recoveries			90		126
Net Charge offs			43		121
Allowance for credit losses on loans
Balance at beginning of period			53,229	78,080	78,080
Charge offs			48		5
Recoveries			90		126
Net Charge offs			43		121
Provision for credit losses			(714)		(24,972)
Balance at end of period	$ 52,557		$ 52,557		$ 53,229
Percent of Loans	2.86%		2.86%		2.94%
Allowance for Loans Losses and Unfunded Commitments [Member] | Commercial real estate lending
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Charge offs			$ (48)		$ (14,351)
Recoveries			90		3,288
Net Charge offs			43		(11,063)
Allowance for credit losses on loans
Balance at beginning of period			126,968	172,152	172,152
Charge offs			48		14,351
Recoveries			90		3,288
Net Charge offs			43		(11,063)
Provision for credit losses			(13,049)		(34,121)
Balance at end of period	$ 113,961		$ 113,961		$ 126,968
Percent of Loans	1.65%		1.65%		2.05%
Allowance for Loans Losses and Unfunded Commitments [Member] | Total commercial
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Charge offs			$ (3,692)		$ (35,915)
Recoveries			4,258		11,972
Net Charge offs			565		(23,943)
Allowance for credit losses on loans
Balance at beginning of period			246,965	349,327	349,327
Charge offs			3,692		35,915
Recoveries			4,258		11,972
Net Charge offs			565		(23,943)
Provision for credit losses			1,632		(78,419)
Balance at end of period	$ 249,162		$ 249,162		$ 246,965
Percent of Loans	1.43%		1.43%		1.58%
Allowance for Loans Losses and Unfunded Commitments [Member] | Residential mortgage
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Charge offs			$ (287)		$ (880)
Recoveries			752		841
Net Charge offs			465		(38)
Allowance for credit losses on loans
Balance at beginning of period			40,787	42,996	42,996
Charge offs			287		880
Recoveries			752		841
Net Charge offs			465		(38)
Provision for credit losses			(2,345)		(2,170)
Balance at end of period	$ 38,907		$ 38,907		$ 40,787
Percent of Loans	0.47%		0.47%		0.54%
Allowance for Loans Losses and Unfunded Commitments [Member] | Auto finance
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Charge offs			$ (228)		$ (22)
Recoveries			53		31
Net Charge offs			(175)		9
Allowance for credit losses on loans
Balance at beginning of period			1,999	174	174
Charge offs			228		22
Recoveries			53		31
Net Charge offs			(175)		9
Provision for credit losses			13,917		1,816
Balance at end of period	$ 15,741		$ 15,741		$ 1,999
Percent of Loans	1.41%		1.41%		1.40%
Allowance for Loans Losses and Unfunded Commitments [Member] | Home equity
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Charge offs			$ (524)		$ (668)
Recoveries			1,199		2,854
Net Charge offs			675		2,186
Allowance for credit losses on loans
Balance at beginning of period			16,603	21,967	21,967
Charge offs			524		668
Recoveries			1,199		2,854
Net Charge offs			675		2,186
Provision for credit losses			(600)		(7,550)
Balance at end of period	$ 16,678		$ 16,678		$ 16,603
Percent of Loans	2.72%		2.72%		2.79%
Allowance for Loans Losses and Unfunded Commitments [Member] | Other consumer
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Charge offs					$ (3,168)
Recoveries					1,267
Net Charge offs					(1,901)
Allowance for credit losses on loans
Balance at beginning of period			$ 13,436	17,013	17,013
Charge offs					3,168
Recoveries					1,267
Net Charge offs					(1,901)
Provision for credit losses					(1,676)
Balance at end of period					$ 13,436
Percent of Loans					4.45%
Allowance for Loans Losses and Unfunded Commitments [Member] | Other consumer
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Charge offs			(2,434)
Recoveries			792
Net Charge offs			(1,642)
Allowance for credit losses on loans
Balance at beginning of period			13,436
Charge offs			2,434
Recoveries			792
Net Charge offs			(1,642)
Provision for credit losses			397
Balance at end of period	$ 12,191		$ 12,191		$ 13,436
Percent of Loans	4.04%		4.04%
Allowance for Loans Losses and Unfunded Commitments [Member] | Total consumer
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Charge offs			$ (3,472)		(4,738)
Recoveries			2,796		4,993
Net Charge offs			(676)		256
Allowance for credit losses on loans
Balance at beginning of period			72,825	$ 82,150	82,150
Charge offs			3,472		4,738
Recoveries			2,796		4,993
Net Charge offs			(676)		256
Provision for credit losses			11,368		(9,581)
Balance at end of period	$ 83,517		$ 83,517		$ 72,825
Percent of Loans	0.81%		0.81%		0.85%