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Loans and Leases Receivable and Allowance for Credit Losses on Loans and Leases - Summary of Amortized Cost of Loans and Leases on Nonaccrual Status (Detail) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Financing Receivable, Impaired [Line Items]
Nonaccrual loans with no related allowance	$ 17,180	$ 12,564
Nonaccrual loans with related allowance	12,469	11,967
Total nonaccrual loans	29,649	24,531
Commercial and industrial, including specialty lending
Financing Receivable, Impaired [Line Items]
Nonaccrual loans with no related allowance	3,297	1,731
Nonaccrual loans with related allowance	2,470	30
Total nonaccrual loans	5,767	1,761
Multifamily
Financing Receivable, Impaired [Line Items]
Nonaccrual loans with no related allowance	0	1,143
Nonaccrual loans with related allowance	0	0
Total nonaccrual loans	0	1,143
Commercial real estate owner occupied
Financing Receivable, Impaired [Line Items]
Nonaccrual loans with no related allowance	7,442	2,768
Nonaccrual loans with related allowance	0	0
Total nonaccrual loans	7,442	2,768
Residential real estate
Financing Receivable, Impaired [Line Items]
Nonaccrual loans with no related allowance	6,441	6,922
Nonaccrual loans with related allowance	118	0
Total nonaccrual loans	6,559	6,922
Manufactured housing
Financing Receivable, Impaired [Line Items]
Nonaccrual loans with no related allowance	0	0
Nonaccrual loans with related allowance	2,582	2,410
Total nonaccrual loans	2,582	2,410
Installment
Financing Receivable, Impaired [Line Items]
Nonaccrual loans with no related allowance	0	0
Nonaccrual loans with related allowance	7,299	9,527
Total nonaccrual loans	$ 7,299	$ 9,527

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- Definition

Amortized cost excluding accrued interest, of financing receivable on nonaccrual status. Excludes net investment in lease.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 16
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479319/326-20-50-16

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- Definition

Amortized cost excluding accrued interest, of financing receivable on nonaccrual status with no allowance for credit loss. Excludes net investment in lease.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 16
-Subparagraph (d)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479319/326-20-50-16

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