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	Jun. 30, 2023	Dec. 31, 2022
Financing Receivable, Impaired [Line Items]
Nonaccrual loans with no related allowance	$ 17,913	$ 12,564
Nonaccrual loans with related allowance	10,331	11,967
Total nonaccrual loans	28,244	24,531
Commercial and industrial, including specialty lending
Financing Receivable, Impaired [Line Items]
Nonaccrual loans with no related allowance	3,281	1,731
Nonaccrual loans with related allowance	1,160	30
Total nonaccrual loans	4,441	1,761
Multifamily
Financing Receivable, Impaired [Line Items]
Nonaccrual loans with no related allowance	4,022	1,143
Nonaccrual loans with related allowance	0	0
Total nonaccrual loans	4,022	1,143
Commercial real estate owner occupied
Financing Receivable, Impaired [Line Items]
Nonaccrual loans with no related allowance	3,304	2,768
Nonaccrual loans with related allowance	0	0
Total nonaccrual loans	3,304	2,768
Residential real estate
Financing Receivable, Impaired [Line Items]
Nonaccrual loans with no related allowance	7,306	6,922
Nonaccrual loans with related allowance	0	0
Total nonaccrual loans	7,306	6,922
Manufactured housing
Financing Receivable, Impaired [Line Items]
Nonaccrual loans with no related allowance	0	0
Nonaccrual loans with related allowance	2,634	2,410
Total nonaccrual loans	2,634	2,410
Installment
Financing Receivable, Impaired [Line Items]
Nonaccrual loans with no related allowance	0	0
Nonaccrual loans with related allowance	6,537	9,527
Total nonaccrual loans	$ 6,537	$ 9,527