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Loans and Leases Receivable and Allowance for Loan and Lease Losses - Loans by Type and Performance Status (Detail) - USD ($) $ in Thousands | 12 Months Ended |
--- | --- | ---
Dec. 31, 2019 | Dec. 31, 2018
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Past Due Still Accruing | $ 35,123 | $ 15,551
Non-Accrual | 20,021 | 27,494
Current | 7,244,271 | 7,073,879
Total loans | $ 7,316,903 | 7,138,498
Due days for loan payments (days) | 30 days |
Delinquent period (days) | 90 days |
30 to 89 Days Past Due |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Past Due Still Accruing | $ 33,329 | 13,363
90 Days Or More Days Past Due |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Past Due Still Accruing | 1,794 | 2,188
Purchased credit impaired loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total loans | 17,488 | 21,574
Multi-family |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Past Due Still Accruing | 2,133 | 0
Non-Accrual | 4,117 | 1,155
Current | 1,901,336 | 3,282,452
Total loans | 1,909,274 | 3,285,297
Multi-family | 30 to 89 Days Past Due |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Past Due Still Accruing | 2,133 | 0
Multi-family | 90 Days Or More Days Past Due |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Past Due Still Accruing | 0 | 0
Multi-family | Purchased credit impaired loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total loans | 1,688 | 1,690
Commercial and industrial |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Past Due Still Accruing | 2,395 | 1,914
Non-Accrual | 4,531 | 17,764
Current | 1,882,700 | 1,353,586
Total loans | 1,889,980 | 1,373,800
Commercial and industrial | 30 to 89 Days Past Due |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Past Due Still Accruing | 2,395 | 1,914
Commercial and industrial | 90 Days Or More Days Past Due |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Past Due Still Accruing | 0 | 0
Commercial and industrial | Purchased credit impaired loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total loans | 354 | 536
Commercial real estate owner occupied |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Past Due Still Accruing | 5,388 | 193
Non-Accrual | 1,963 | 1,037
Current | 537,992 | 567,809
Total loans | 552,007 | 577,477
Commercial real estate owner occupied | 30 to 89 Days Past Due |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Past Due Still Accruing | 5,388 | 193
Commercial real estate owner occupied | 90 Days Or More Days Past Due |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Past Due Still Accruing | 0 | 0
Commercial real estate owner occupied | Purchased credit impaired loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total loans | 6,664 | 8,438
Commercial real estate non-owner occupied |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Past Due Still Accruing | 8,034 | 1,190
Non-Accrual | 76 | 129
Current | 1,211,892 | 1,119,443
Total loans | 1,223,529 | 1,125,106
Commercial real estate non-owner occupied | 30 to 89 Days Past Due |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Past Due Still Accruing | 8,034 | 1,190
Commercial real estate non-owner occupied | 90 Days Or More Days Past Due |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Past Due Still Accruing | 0 | 0
Commercial real estate non-owner occupied | Purchased credit impaired loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total loans | 3,527 | 4,344
Construction |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Past Due Still Accruing | 0 | 0
Non-Accrual | 0 | 0
Current | 118,418 | 56,491
Total loans | 118,418 | 56,491
Construction | 30 to 89 Days Past Due |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Past Due Still Accruing | 0 | 0
Construction | 90 Days Or More Days Past Due |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Past Due Still Accruing | 0 | 0
Construction | Purchased credit impaired loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total loans | 0 | 0
Residential real estate |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Past Due Still Accruing | 5,924 | 5,940
Non-Accrual | 6,128 | 5,605
Current | 359,491 | 550,679
Total loans | 375,014 | 566,561
Residential real estate | 30 to 89 Days Past Due |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Past Due Still Accruing | 5,924 | 5,940
Residential real estate | 90 Days Or More Days Past Due |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Past Due Still Accruing | 0 | 0
Residential real estate | Purchased credit impaired loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total loans | 3,471 | 4,337
Manufactured housing |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Past Due Still Accruing | 5,493 | 6,114
Non-Accrual | 1,655 | 1,693
Current | 61,649 | 69,916
Total loans | 70,398 | 79,731
Cash | 100 | 500
Manufactured housing | 30 to 89 Days Past Due |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Past Due Still Accruing | 3,699 | 3,926
Manufactured housing | 90 Days Or More Days Past Due |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Past Due Still Accruing | 1,794 | 2,188
Manufactured housing | Purchased credit impaired loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total loans | 1,601 | 2,008
Other consumer |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Past Due Still Accruing | 5,756 | 200
Non-Accrual | 1,551 | 111
Current | 1,170,793 | 73,503
Total loans | 1,178,283 | 74,035
Other consumer | 30 to 89 Days Past Due |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Past Due Still Accruing | 5,756 | 200
Other consumer | 90 Days Or More Days Past Due |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total Past Due Still Accruing | 0 | 0
Other consumer | Purchased credit impaired loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Total loans | $ 183 | $ 221

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