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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 | 3 Months Ended |
--- | --- | ---
Mar. 31, 2019 | Dec. 31, 2018
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Past Due | $ 22,332 | $ 15,551
Non-Accrual | 22,769 | 27,494
Current | 7,202,023 | 7,073,879
Loans and lease receivable, gross | 7,267,246 | 7,138,498
Loans and leases receivable, at amortized cost or lower of cost or market | $ 7,267,246 | 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 | $ 20,122 | 21,574
30-89 Days Past Due |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Past Due | 20,396 | 13,363
90 Days or More Past Due |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Past Due | 1,936 | 2,188
Multi-family |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Past Due | 3,794 | 0
Non-Accrual | 1,997 | 1,155
Current | 3,204,879 | 3,282,452
Loans and lease receivable, gross | 3,212,312 | 3,285,297
Multi-family | Purchased Credit Impaired Loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans and lease receivable, gross | 1,642 | 1,690
Multi-family | 30-89 Days Past Due |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Past Due | 3,794 | 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 | 1,271 | 1,914
Non-Accrual | 12,225 | 17,764
Current | 1,441,679 | 1,353,586
Loans and lease receivable, gross | 1,455,592 | 1,373,800
Commercial and industrial | Purchased Credit Impaired Loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans and lease receivable, gross | 417 | 536
Commercial and industrial | 30-89 Days Past Due |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Past Due | 1,271 | 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 | 3,566 | 193
Non-Accrual | 839 | 1,037
Current | 570,380 | 567,809
Loans and lease receivable, gross | 582,637 | 577,477
Commercial real estate owner occupied | Purchased Credit Impaired Loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans and lease receivable, gross | 7,852 | 8,438
Commercial real estate owner occupied | 30-89 Days Past Due |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Past Due | 3,566 | 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 | 1,976 | 1,190
Non-Accrual | 102 | 129
Current | 1,101,129 | 1,119,443
Loans and lease receivable, gross | 1,107,336 | 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 | 4,129 | 4,344
Commercial real estate non-owner occupied | 30-89 Days Past Due |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Past Due | 1,976 | 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 | 53,372 | 56,491
Loans and lease receivable, gross | 53,372 | 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 | 5,612 | 5,940
Non-Accrual | 5,574 | 5,605
Current | 609,874 | 550,679
Loans and lease receivable, gross | 625,066 | 566,561
Residential real estate | Purchased Credit Impaired Loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans and lease receivable, gross | 4,006 | 4,337
Residential real estate | 30-89 Days Past Due |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Past Due | 5,612 | 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 | 5,622 | 6,114
Non-Accrual | 1,924 | 1,693
Current | 68,362 | 69,916
Loans and lease receivable, gross | 77,778 | 79,731
Manufactured housing | Purchased Credit Impaired Loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans and lease receivable, gross | 1,870 | 2,008
Manufactured housing | 30-89 Days Past Due |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Past Due | 3,686 | 3,926
Manufactured housing | 90 Days or More Past Due |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Past Due | 1,936 | 2,188
Other |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Past Due | 491 | 200
Non-Accrual | 108 | 111
Current | 152,348 | 73,503
Loans and lease receivable, gross | 153,153 | 74,035
Other | Purchased Credit Impaired Loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans and lease receivable, gross | 206 | 221
Other | 30-89 Days Past Due |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Past Due | 491 | 200
Other | 90 Days or More Past Due |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Past Due | $ 0 | $ 0

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