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Loans and Leases Receivable and Allowance for Credit Losses on Loans and Leases - Performance Status (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases receivable	$ 13,144,894	$ 9,018,298
Amount of loans accruing interest	$ 1,900	1,400
Threshold period past due	30 days
Purchased-credit-impaired loans	$ 8,300	9,900
Small Business Administration (SBA), CARES Act, Paycheck Protection Program
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases receivable	1,000,000	3,300,000
Total past due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases receivable	75,345	68,433
30 to 59 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases receivable	38,471	18,374
30 to 59 Days Past Due | Small Business Administration (SBA), CARES Act, Paycheck Protection Program
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases receivable	600	6,300
60 to 89 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases receivable	15,570	8,654
90 Days Or More Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases receivable	21,304	41,405
Loans and leases not past due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases receivable	13,069,549	8,949,865
Loans and leases not past due | Small Business Administration (SBA), CARES Act, Paycheck Protection Program
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases receivable		3,300,000
Financial Asset, Greater Than 60 Days Past Due | Small Business Administration (SBA), CARES Act, Paycheck Protection Program
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases receivable	36,000
Financial Asset, Equal to or Greater than 60 Days Past Due | Small Business Administration (SBA), CARES Act, Paycheck Protection Program
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases receivable		21,800
Commercial and industrial, including specialty lending
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases receivable	6,672,830	3,424,783
Commercial and industrial, including specialty lending | Total past due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases receivable	5,255	8,117
Commercial and industrial, including specialty lending | 30 to 59 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases receivable	3,123	2,093
Commercial and industrial, including specialty lending | 60 to 89 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases receivable	717	95
Commercial and industrial, including specialty lending | 90 Days Or More Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases receivable	1,415	5,929
Commercial and industrial, including specialty lending | Loans and leases not past due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases receivable	6,667,575	3,416,666
Multifamily
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases receivable	2,213,019	1,486,308
Multifamily | Total past due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases receivable	17,044	22,624
Multifamily | 30 to 59 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases receivable	10,684	1,682
Multifamily | 60 to 89 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases receivable	5,217	2,707
Multifamily | 90 Days Or More Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases receivable	1,143	18,235
Multifamily | Loans and leases not past due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases receivable	2,195,975	1,463,684
Commercial real estate owner occupied
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases receivable	885,339	654,922
Commercial real estate owner occupied | Total past due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases receivable	7,877	1,591
Commercial real estate owner occupied | 30 to 59 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases receivable	5,173	287
Commercial real estate owner occupied | 60 to 89 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases receivable	0	0
Commercial real estate owner occupied | 90 Days Or More Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases receivable	2,704	1,304
Commercial real estate owner occupied | Loans and leases not past due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases receivable	877,462	653,331
Commercial real estate non-owner occupied
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases receivable	1,290,730	1,121,238
Commercial real estate non-owner occupied | Total past due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases receivable	2,147	2,815
Commercial real estate non-owner occupied | 30 to 59 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases receivable	2,136	0
Commercial real estate non-owner occupied | 60 to 89 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases receivable	0	0
Commercial real estate non-owner occupied | 90 Days Or More Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases receivable	11	2,815
Commercial real estate non-owner occupied | Loans and leases not past due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases receivable	1,288,583	1,118,423
Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases receivable	162,009	198,981
Construction | Total past due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases receivable	0	0
Construction | 30 to 59 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases receivable	0	0
Construction | 60 to 89 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases receivable	0	0
Construction | 90 Days Or More Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases receivable	0	0
Construction | Loans and leases not past due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases receivable	162,009	198,981
Residential real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases receivable	497,952	334,730
Residential real estate | Total past due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases receivable	9,523	9,834
Residential real estate | 30 to 59 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases receivable	5,208	4,655
Residential real estate | 60 to 89 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases receivable	1,157	789
Residential real estate | 90 Days Or More Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases receivable	3,158	4,390
Residential real estate | Loans and leases not past due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases receivable	488,429	324,896
Manufactured housing
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases receivable	45,076	52,861
Manufactured housing | Total past due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases receivable	4,784	8,025
Manufactured housing | 30 to 59 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases receivable	901	2,308
Manufactured housing | 60 to 89 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases receivable	537	768
Manufactured housing | 90 Days Or More Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases receivable	3,346	4,949
Manufactured housing | Loans and leases not past due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases receivable	40,292	44,836
Installment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases receivable	1,377,939	1,744,475
Installment | Total past due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases receivable	28,715	15,427
Installment | 30 to 59 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases receivable	11,246	7,349
Installment | 60 to 89 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases receivable	7,942	4,295
Installment | 90 Days Or More Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases receivable	9,527	3,783
Installment | Loans and leases not past due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans and leases receivable	$ 1,349,224	$ 1,729,048

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Amortized cost excluding accrued interest, of financing receivable 90 days or more past due and still accruing. Excludes net investment in lease.

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
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Amortized cost excluding accrued interest, before allowance for credit loss, of financing receivable. Excludes net investment in lease.

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
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Amount at purchase price of financing receivable purchased with credit deterioration.

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-Publisher FASB
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