Allowance for Credit Losses - Activity by Portfolio Segment (Details) - USD ($) $ in Thousands		3 Months Ended
	Jan. 06, 2022	Mar. 31, 2022	Mar. 31, 2021
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Balance at beginning of the period		$ 58,047	$ 71,124
Initial allowance for credit losses on PCD loans	$ 12,077	12,077	0
Charge-offs		(7,804)	(1,270)
Recoveries		162	206
Provision (benefit) for credit loss - loans		4,630	(2,808)
Balance at end of the period		67,112	67,252
Non-owner occupied commercial
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Balance at beginning of the period		20,071	25,910
Initial allowance for credit losses on PCD loans		1,312
Charge-offs		(4)	(593)
Recoveries		0	1
Provision (benefit) for credit loss - loans		2,270	(1,438)
Balance at end of the period		23,649	23,880
Owner occupied commercial
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Balance at beginning of the period		3,964	3,955
Initial allowance for credit losses on PCD loans		1,137
Charge-offs		(34)	(78)
Recoveries		10	8
Provision (benefit) for credit loss - loans		1,048	118
Balance at end of the period		6,125	4,003
Multifamily
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Balance at beginning of the period		8,309	7,253
Initial allowance for credit losses on PCD loans		4
Charge-offs		0	0
Recoveries		0	0
Provision (benefit) for credit loss - loans		(13)	255
Balance at end of the period		8,300	7,508
Non-owner occupied residential
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Balance at beginning of the period		2,380	3,321
Initial allowance for credit losses on PCD loans		175
Charge-offs		0	(208)
Recoveries		14	2
Provision (benefit) for credit loss - loans		339	(232)
Balance at end of the period		2,908	2,883
Commercial, industrial and other
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Balance at beginning of the period		9,891	13,665
Initial allowance for credit losses on PCD loans		2,413
Charge-offs		(823)	(265)
Recoveries		45	44
Provision (benefit) for credit loss - loans		148	(1,305)
Balance at end of the period		11,674	12,139
Construction
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Balance at beginning of the period		838	786
Initial allowance for credit losses on PCD loans		6,843
Charge-offs		(6,807)	0
Recoveries		3	25
Provision (benefit) for credit loss - loans		850	318
Balance at end of the period		1,727	1,129
Equipment finance
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Balance at beginning of the period		3,663	6,552
Initial allowance for credit losses on PCD loans		0
Charge-offs		(97)	(94)
Recoveries		15	11
Provision (benefit) for credit loss - loans		(1,122)	(205)
Balance at end of the period		2,459	6,264
Residential mortgage
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Balance at beginning of the period		3,914	3,623
Initial allowance for credit losses on PCD loans		179
Charge-offs		0	0
Recoveries		48	58
Provision (benefit) for credit loss - loans		1,545	100
Balance at end of the period		5,686	3,781
Consumer
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Balance at beginning of the period		5,017	6,059
Initial allowance for credit losses on PCD loans		14
Charge-offs		(39)	(32)
Recoveries		27	57
Provision (benefit) for credit loss - loans		(435)	(419)
Balance at end of the period		$ 4,584	$ 5,665