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Loans and Leases Receivable and Allowance for Credit Losses - Performance Status (Detail) - USD ($) $ in Thousands | Mar. 31, 2021 | Dec. 31, 2020
--- | --- | ---
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Past Due | $ 60,574 | $ 62,045
Loans and leases not past due | 7,475,915 | 7,513,323
Total loans and leases receivable | $ 7,536,489 | 7,575,368
Threshold period past due | 30 days |
Loans receivable, PPP | $ 5,178,089 | 4,561,365
Purchased-credit-impaired loans | 12,500 | 13,400
30 to 59 Days Past Due |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Past Due | 24,064 | 21,633
60 to 89 Days Past Due |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Past Due | 9,208 | 13,812
90 Days or More Past Due |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Past Due | 27,302 | 26,600
Multi-family |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Past Due | 26,428 | 24,324
Loans and leases not past due | 1,613,850 | 1,736,977
Total loans and leases receivable | 1,640,278 | 1,761,301
Multi-family | 30 to 59 Days Past Due |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Past Due | 8,480 | 4,193
Multi-family | 60 to 89 Days Past Due |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Past Due | 1,245 | 5,224
Multi-family | 90 Days or More Past Due |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Past Due | 16,703 | 14,907
Commercial and industrial |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Past Due | 9,523 | 6,610
Loans and leases not past due | 2,211,129 | 2,282,831
Total loans and leases receivable | 2,220,652 | 2,289,441
Commercial and industrial | 30 to 59 Days Past Due |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Past Due | 2,086 | 2,257
Commercial and industrial | 60 to 89 Days Past Due |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Past Due | 4,732 | 1,274
Commercial and industrial | 90 Days or More Past Due |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Past Due | 2,705 | 3,079
Commercial real estate owner occupied |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Past Due | 4,139 | 4,558
Loans and leases not past due | 585,954 | 567,780
Total loans and leases receivable | 590,093 | 572,338
Commercial real estate owner occupied | 30 to 59 Days Past Due |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Past Due | 1,920 | 864
Commercial real estate owner occupied | 60 to 89 Days Past Due |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Past Due | 0 | 1,324
Commercial real estate owner occupied | 90 Days or More Past Due |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Past Due | 2,219 | 2,370
Commercial real estate non-owner occupied |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Past Due | 4,525 | 2,416
Loans and leases not past due | 1,190,307 | 1,194,148
Total loans and leases receivable | 1,194,832 | 1,196,564
Commercial real estate non-owner occupied | 30 to 59 Days Past Due |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Past Due | 2,169 | 0
Commercial real estate non-owner occupied | 60 to 89 Days Past Due |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Past Due | 0 | 60
Commercial real estate non-owner occupied | 90 Days or More Past Due |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Past Due | 2,356 | 2,356
Construction |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Past Due | 0 | 0
Loans and leases not past due | 156,837 | 140,905
Total loans and leases receivable | 156,837 | 140,905
Construction | 30 to 59 Days Past Due |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Past Due | 0 | 0
Construction | 60 to 89 Days Past Due |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Past Due | 0 | 0
Construction | 90 Days or More Past Due |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Past Due | 0 | 0
Residential real estate |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Past Due | 4,073 | 10,323
Loans and leases not past due | 289,732 | 306,847
Total loans and leases receivable | 293,805 | 317,170
Residential real estate | 30 to 59 Days Past Due |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Past Due | 2,514 | 6,640
Residential real estate | 60 to 89 Days Past Due |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Past Due | 235 | 1,827
Residential real estate | 90 Days or More Past Due |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Past Due | 1,324 | 1,856
Manufactured housing |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Past Due | 4,191 | 4,142
Loans and leases not past due | 55,786 | 58,101
Total loans and leases receivable | 59,977 | 62,243
Manufactured housing | 30 to 59 Days Past Due |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Past Due | 1,403 | 1,518
Manufactured housing | 60 to 89 Days Past Due |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Past Due | 871 | 673
Manufactured housing | 90 Days or More Past Due |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Past Due | 1,917 | 1,951
Installment |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Past Due | 7,695 | 9,672
Loans and leases not past due | 1,372,320 | 1,225,734
Total loans and leases receivable | 1,380,015 | 1,235,406
Installment | 30 to 59 Days Past Due |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Past Due | 5,492 | 6,161
Installment | 60 to 89 Days Past Due |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Past Due | 2,125 | 3,430
Installment | 90 Days or More Past Due |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Past Due | $ 78 | $ 81

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