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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 | 6 Months Ended |
--- | --- | ---
Jun. 30, 2019 | Dec. 31, 2018
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Past Due | $ 11,605 | $ 15,551
Non-Accrual | 13,433 | 27,494
Current | 7,671,481 | 7,073,879
Loans and lease receivable, gross | 7,715,769 | 7,138,498
Loans and leases receivable, at amortized cost or lower of cost or market | $ 7,715,769 | 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 | $ 19,250 | 21,574
30-89 Days Past Due |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Past Due | 9,599 | 13,363
90 Days or More Past Due |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Past Due | 2,006 | 2,188
Multi-family |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Past Due | 0 | 0
Non-Accrual | 0 | 1,155
Current | 3,015,935 | 3,282,452
Loans and lease receivable, gross | 3,017,531 | 3,285,297
Multi-family | Purchased Credit Impaired Loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans and lease receivable, gross | 1,596 | 1,690
Multi-family | 30-89 Days Past Due |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Past Due | 0 | 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 | 626 | 1,914
Non-Accrual | 5,400 | 17,764
Current | 1,592,049 | 1,353,586
Loans and lease receivable, gross | 1,598,470 | 1,373,800
Commercial and industrial | Purchased Credit Impaired Loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans and lease receivable, gross | 395 | 536
Commercial and industrial | 30-89 Days Past Due |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Past Due | 626 | 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 | 801 | 193
Non-Accrual | 927 | 1,037
Current | 576,692 | 567,809
Loans and lease receivable, gross | 586,086 | 577,477
Commercial real estate owner occupied | Purchased Credit Impaired Loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans and lease receivable, gross | 7,666 | 8,438
Commercial real estate owner occupied | 30-89 Days Past Due |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Past Due | 801 | 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 | 252 | 1,190
Non-Accrual | 94 | 129
Current | 1,172,421 | 1,119,443
Loans and lease receivable, gross | 1,176,575 | 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 | 3,808 | 4,344
Commercial real estate non-owner occupied | 30-89 Days Past Due |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Past Due | 252 | 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 | 59,811 | 56,491
Loans and lease receivable, gross | 59,811 | 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 | 2,611 | 5,940
Non-Accrual | 5,083 | 5,605
Current | 637,309 | 550,679
Loans and lease receivable, gross | 648,860 | 566,561
Residential real estate | Purchased Credit Impaired Loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans and lease receivable, gross | 3,857 | 4,337
Residential real estate | 30-89 Days Past Due |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Past Due | 2,611 | 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 | 5,835 | 6,114
Non-Accrual | 1,570 | 1,693
Current | 66,470 | 69,916
Loans and lease receivable, gross | 75,597 | 79,731
Cash | 400 | 500
Manufactured housing | Purchased Credit Impaired Loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans and lease receivable, gross | 1,722 | 2,008
Manufactured housing | 30-89 Days Past Due |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Past Due | 3,829 | 3,926
Manufactured housing | 90 Days or More Past Due |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Past Due | 2,006 | 2,188
Other consumer |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Past Due | 1,480 | 200
Non-Accrual | 359 | 111
Current | 550,794 | 73,503
Loans and lease receivable, gross | 552,839 | 74,035
Other consumer | Purchased Credit Impaired Loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans and lease receivable, gross | 206 | 221
Other consumer | 30-89 Days Past Due |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Past Due | 1,480 | 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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