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Loans and Leases Receivable and Allowance for Loan and Lease Losses - Non-Covered Loans and Covered Loans by Class and Performance Status (Detail) - USD ($) $ in Thousands | 9 Months Ended |
--- | --- | ---
Sep. 30, 2019 | Dec. 31, 2018
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Past Due | $ 16,599 | $ 15,551
Non-Accrual | 16,265 | 27,494
Current | 7,287,302 | 7,073,879
Loans and lease receivable, gross | 7,338,555 | 7,138,498
Loans and leases receivable, at amortized cost or lower of cost or market | $ 7,338,555 | 7,138,498
Delinquent period | 30 days |
Due days for loan payments | 90 days |
Purchased Credit Impaired Loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans and lease receivable, gross | $ 18,389 | 21,574
30-89 Days Past Due |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Past Due | 14,656 | 13,363
90 Days or More Past Due |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Past Due | 1,943 | 2,188
Multi-family |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Past Due | 3,662 | 0
Non-Accrual | 0 | 1,155
Current | 2,294,926 | 3,282,452
Loans and lease receivable, gross | 2,300,244 | 3,285,297
Multi-family | Purchased Credit Impaired Loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans and lease receivable, gross | 1,656 | 1,690
Multi-family | 30-89 Days Past Due |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Past Due | 3,662 | 0
Multi-family | 90 Days or More Past Due |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Past Due | 0 | 0
Commercial and industrial |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Past Due | 860 | 1,914
Non-Accrual | 5,314 | 17,764
Current | 1,881,586 | 1,353,586
Loans and lease receivable, gross | 1,888,134 | 1,373,800
Commercial and industrial | Purchased Credit Impaired Loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans and lease receivable, gross | 374 | 536
Commercial and industrial | 30-89 Days Past Due |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Past Due | 860 | 1,914
Commercial and industrial | 90 Days or More Past Due |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Past Due | 0 | 0
Commercial real estate owner occupied |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Past Due | 686 | 193
Non-Accrual | 2,068 | 1,037
Current | 465,934 | 567,809
Loans and lease receivable, gross | 475,465 | 577,477
Commercial real estate owner occupied | Purchased Credit Impaired Loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans and lease receivable, gross | 6,777 | 8,438
Commercial real estate owner occupied | 30-89 Days Past Due |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Past Due | 686 | 193
Commercial real estate owner occupied | 90 Days or More Past Due |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Past Due | 0 | 0
Commercial real estate non-owner occupied |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Past Due | 0 | 1,190
Non-Accrual | 83 | 129
Current | 1,264,361 | 1,119,443
Loans and lease receivable, gross | 1,268,557 | 1,125,106
Commercial real estate non-owner occupied | Purchased Credit Impaired Loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans and lease receivable, gross | 4,113 | 4,344
Commercial real estate non-owner occupied | 30-89 Days Past Due |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Past Due | 0 | 1,190
Commercial real estate non-owner occupied | 90 Days or More Past Due |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Past Due | 0 | 0
Construction |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Past Due | 0 | 0
Non-Accrual | 0 | 0
Current | 61,200 | 56,491
Loans and lease receivable, gross | 61,200 | 56,491
Construction | Purchased Credit Impaired Loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans and lease receivable, gross | 0 | 0
Construction | 30-89 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 | 2,485 | 5,940
Non-Accrual | 6,093 | 5,605
Current | 616,533 | 550,679
Loans and lease receivable, gross | 628,786 | 566,561
Residential real estate | Purchased Credit Impaired Loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans and lease receivable, gross | 3,675 | 4,337
Residential real estate | 30-89 Days Past Due |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Past Due | 2,485 | 5,940
Residential real estate | 90 Days or More Past Due |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Past Due | 0 | 0
Manufactured housing |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Past Due | 5,096 | 6,114
Non-Accrual | 1,567 | 1,693
Current | 64,362 | 69,916
Loans and lease receivable, gross | 72,616 | 79,731
Cash | 24 | 500
Manufactured housing | Purchased Credit Impaired Loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans and lease receivable, gross | 1,591 | 2,008
Manufactured housing | 30-89 Days Past Due |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Past Due | 3,153 | 3,926
Manufactured housing | 90 Days or More Past Due |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Past Due | 1,943 | 2,188
Other consumer |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Past Due | 3,810 | 200
Non-Accrual | 1,140 | 111
Current | 638,400 | 73,503
Loans and lease receivable, gross | 643,553 | 74,035
Other consumer | Purchased Credit Impaired Loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans and lease receivable, gross | 203 | 221
Other consumer | 30-89 Days Past Due |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Past Due | 3,810 | 200
Other consumer | 90 Days or More Past Due |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Past Due | $ 0 | $ 0

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