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Loans and Leases Receivable and Allowance for Credit Losses - Summary of Amortized Cost of Loans and Leases on Nonaccrual Status (Detail) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Financing Receivable, Impaired [Line Items]
Nonaccrual loans with no related allowance	$ 42,666	$ 40,862
Nonaccrual loans with related allowance	5,415	11,177
Total nonaccrual loans	48,081	52,039
Multi-family
Financing Receivable, Impaired [Line Items]
Nonaccrual loans with no related allowance	20,530	18,800
Nonaccrual loans with related allowance	0	2,928
Total nonaccrual loans	20,530	21,728
Commercial and industrial
Financing Receivable, Impaired [Line Items]
Nonaccrual loans with no related allowance	7,282	6,384
Nonaccrual loans with related allowance	262	2,069
Total nonaccrual loans	7,544	8,453
Commercial real estate owner occupied
Financing Receivable, Impaired [Line Items]
Nonaccrual loans with no related allowance	3,242	3,411
Nonaccrual loans with related allowance	0	0
Total nonaccrual loans	3,242	3,411
Commercial real estate non-owner occupied
Financing Receivable, Impaired [Line Items]
Nonaccrual loans with no related allowance	2,259	2,356
Nonaccrual loans with related allowance	97	0
Total nonaccrual loans	2,356	2,356
Residential real estate
Financing Receivable, Impaired [Line Items]
Nonaccrual loans with no related allowance	9,353	9,911
Nonaccrual loans with related allowance	0	0
Total nonaccrual loans	9,353	9,911
Manufactured housing
Financing Receivable, Impaired [Line Items]
Nonaccrual loans with no related allowance	0	0
Nonaccrual loans with related allowance	2,871	2,969
Total nonaccrual loans	2,871	2,969
Installment
Financing Receivable, Impaired [Line Items]
Nonaccrual loans with no related allowance	0	0
Nonaccrual loans with related allowance	2,185	3,211
Total nonaccrual loans	$ 2,185	$ 3,211

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Amount of financing receivable on nonaccrual status with no allowance for credit loss.

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
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-Topic 326
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