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Loans and Leases Receivable and Allowance for Loan and Lease Losses - Schedule of Allowance for Loan and Lease Losses (Detail) - USD ($) $ in Thousands | 3 Months Ended |  |
--- | --- | --- | ---
Mar. 31, 2019 | Mar. 31, 2018 | Mar. 31, 2019 | Dec. 31, 2018
Allowance for Loan and Lease Losses [Roll Forward] |  |  |  |
Beginning balance | $ 39,972 | $ 38,015 |  |
Charge-offs | (1,344) | (689) |  |
Recoveries | 284 | 56 |  |
Provision for loan and lease losses | 4,767 | 2,117 |  |
Ending balance | 43,679 | 39,499 |  |
Loans: |  |  |  |
Individually evaluated for impairment |  |  | $ 39,359 | $ 39,118
Collectively evaluated for impairment |  |  | 7,207,765 | 7,077,806
Loans and leases receivable, gross |  |  | 7,267,246 | 7,138,498
Loans receivable, at amortized cost or lower of cost or market |  |  | 7,267,246 | 7,138,498
Allowance for loan losses: |  |  |  |
Individually evaluated for impairment |  |  | 380 | 845
Collectively evaluated for impairment |  |  | 40,469 | 36,249
Total Allowance for loan losses | 39,972 | 38,015 | 43,679 | 39,972
Purchased Credit Impaired Loans |  |  |  |
Loans: |  |  |  |
Loans acquired with credit deterioration |  |  | 20,122 | 21,574
Loans and leases receivable, gross |  |  | 20,122 | 21,574
Allowance for loan losses: |  |  |  |
Loans acquired with credit deterioration |  |  | 2,830 | 2,878
Multi-family |  |  |  |
Allowance for Loan and Lease Losses [Roll Forward] |  |  |  |
Beginning balance | 11,462 | 12,168 |  |
Charge-offs | (541) | 0 |  |
Recoveries | 0 | 0 |  |
Provision for loan and lease losses | (291) | 377 |  |
Ending balance | 10,630 | 12,545 |  |
Loans: |  |  |  |
Individually evaluated for impairment |  |  | 1,997 | 1,155
Collectively evaluated for impairment |  |  | 3,208,673 | 3,282,452
Loans and leases receivable, gross |  |  | 3,212,312 | 3,285,297
Allowance for loan losses: |  |  |  |
Individually evaluated for impairment |  |  | 0 | 539
Collectively evaluated for impairment |  |  | 10,630 | 10,923
Total Allowance for loan losses | 11,462 | 12,168 | 10,630 | 11,462
Multi-family | Purchased Credit Impaired Loans |  |  |  |
Loans: |  |  |  |
Loans acquired with credit deterioration |  |  | 1,642 | 1,690
Loans and leases receivable, gross |  |  | 1,642 | 1,690
Allowance for loan losses: |  |  |  |
Loans acquired with credit deterioration |  |  | 0 | 0
Commercial and industrial |  |  |  |
Allowance for Loan and Lease Losses [Roll Forward] |  |  |  |
Beginning balance | 12,145 | 10,918 |  |
Charge-offs | 0 | (50) |  |
Recoveries | 119 | 35 |  |
Provision for loan and lease losses | 383 | 834 |  |
Ending balance | 12,647 | 11,737 |  |
Loans: |  |  |  |
Individually evaluated for impairment |  |  | 17,411 | 17,828
Collectively evaluated for impairment |  |  | 1,437,764 | 1,355,436
Loans and leases receivable, gross |  |  | 1,455,592 | 1,373,800
Allowance for loan losses: |  |  |  |
Individually evaluated for impairment |  |  | 263 | 261
Collectively evaluated for impairment |  |  | 12,116 | 11,516
Total Allowance for loan losses | 12,145 | 10,918 | 12,647 | 12,145
Commercial and industrial | Purchased Credit Impaired Loans |  |  |  |
Loans: |  |  |  |
Loans acquired with credit deterioration |  |  | 417 | 536
Loans and leases receivable, gross |  |  | 417 | 536
Allowance for loan losses: |  |  |  |
Loans acquired with credit deterioration |  |  | 268 | 368
Commercial real estate owner occupied |  |  |  |
Allowance for Loan and Lease Losses [Roll Forward] |  |  |  |
Beginning balance | 3,320 | 3,232 |  |
Charge-offs | (8) | (18) |  |
Recoveries | 128 | 0 |  |
Provision for loan and lease losses | (15) | 311 |  |
Ending balance | 3,425 | 3,525 |  |
Loans: |  |  |  |
Individually evaluated for impairment |  |  | 867 | 1,069
Collectively evaluated for impairment |  |  | 573,918 | 567,970
Loans and leases receivable, gross |  |  | 582,637 | 577,477
Allowance for loan losses: |  |  |  |
Individually evaluated for impairment |  |  | 36 | 1
Collectively evaluated for impairment |  |  | 3,389 | 3,319
Total Allowance for loan losses | 3,425 | 3,232 | 3,425 | 3,320
Commercial real estate owner occupied | Purchased Credit Impaired Loans |  |  |  |
Loans: |  |  |  |
Loans acquired with credit deterioration |  |  | 7,852 | 8,438
Loans and leases receivable, gross |  |  | 7,852 | 8,438
Allowance for loan losses: |  |  |  |
Loans acquired with credit deterioration |  |  | 0 | 0
Commercial real estate non-owner occupied |  |  |  |
Allowance for Loan and Lease Losses [Roll Forward] |  |  |  |
Beginning balance | 6,093 | 7,437 |  |
Charge-offs | 0 | 0 |  |
Recoveries | 0 | 0 |  |
Provision for loan and lease losses | (78) | (204) |  |
Ending balance | 6,015 | 7,233 |  |
Loans: |  |  |  |
Individually evaluated for impairment |  |  | 102 | 129
Collectively evaluated for impairment |  |  | 1,103,105 | 1,120,633
Loans and leases receivable, gross |  |  | 1,107,336 | 1,125,106
Allowance for loan losses: |  |  |  |
Individually evaluated for impairment |  |  | 0 | 0
Collectively evaluated for impairment |  |  | 4,019 | 4,161
Total Allowance for loan losses | 6,015 | 7,437 | 6,015 | 6,093
Commercial real estate non-owner occupied | Purchased Credit Impaired Loans |  |  |  |
Loans: |  |  |  |
Loans acquired with credit deterioration |  |  | 4,129 | 4,344
Loans and leases receivable, gross |  |  | 4,129 | 4,344
Allowance for loan losses: |  |  |  |
Loans acquired with credit deterioration |  |  | 1,996 | 1,932
Construction |  |  |  |
Allowance for Loan and Lease Losses [Roll Forward] |  |  |  |
Beginning balance | 624 | 979 |  |
Charge-offs | 0 | 0 |  |
Recoveries | 6 | 11 |  |
Provision for loan and lease losses | (46) | (69) |  |
Ending balance | 584 | 921 |  |
Loans: |  |  |  |
Individually evaluated for impairment |  |  | 0 | 0
Collectively evaluated for impairment |  |  | 53,372 | 56,491
Loans and leases receivable, gross |  |  | 53,372 | 56,491
Allowance for loan losses: |  |  |  |
Individually evaluated for impairment |  |  | 0 | 0
Collectively evaluated for impairment |  |  | 584 | 624
Total Allowance for loan losses | 584 | 979 | 584 | 624
Construction | Purchased Credit Impaired Loans |  |  |  |
Loans: |  |  |  |
Loans acquired with credit deterioration |  |  | 0 | 0
Loans and leases receivable, gross |  |  | 0 | 0
Allowance for loan losses: |  |  |  |
Loans acquired with credit deterioration |  |  | 0 | 0
Residential real estate |  |  |  |
Allowance for Loan and Lease Losses [Roll Forward] |  |  |  |
Beginning balance | 3,654 | 2,929 |  |
Charge-offs | (40) | (365) |  |
Recoveries | 7 | 7 |  |
Provision for loan and lease losses | 2,951 | 608 |  |
Ending balance | 6,572 | 3,179 |  |
Loans: |  |  |  |
Individually evaluated for impairment |  |  | 8,567 | 8,631
Collectively evaluated for impairment |  |  | 612,493 | 553,593
Loans and leases receivable, gross |  |  | 625,066 | 566,561
Allowance for loan losses: |  |  |  |
Individually evaluated for impairment |  |  | 78 | 41
Collectively evaluated for impairment |  |  | 6,105 | 3,227
Total Allowance for loan losses | 3,654 | 2,929 | 6,572 | 3,654
Residential real estate | Purchased Credit Impaired Loans |  |  |  |
Loans: |  |  |  |
Loans acquired with credit deterioration |  |  | 4,006 | 4,337
Loans and leases receivable, gross |  |  | 4,006 | 4,337
Allowance for loan losses: |  |  |  |
Loans acquired with credit deterioration |  |  | 389 | 386
Manufactured housing |  |  |  |
Allowance for Loan and Lease Losses [Roll Forward] |  |  |  |
Beginning balance | 145 | 180 |  |
Charge-offs | 0 | 0 |  |
Recoveries | 0 | 0 |  |
Provision for loan and lease losses | (28) | (4) |  |
Ending balance | 117 | 176 |  |
Loans: |  |  |  |
Individually evaluated for impairment |  |  | 10,307 | 10,195
Collectively evaluated for impairment |  |  | 65,601 | 67,528
Loans and leases receivable, gross |  |  | 77,778 | 79,731
Allowance for loan losses: |  |  |  |
Individually evaluated for impairment |  |  | 3 | 3
Collectively evaluated for impairment |  |  | 89 | 89
Total Allowance for loan losses | 145 | 180 | 117 | 145
Manufactured housing | Purchased Credit Impaired Loans |  |  |  |
Loans: |  |  |  |
Loans acquired with credit deterioration |  |  | 1,870 | 2,008
Loans and leases receivable, gross |  |  | 1,870 | 2,008
Allowance for loan losses: |  |  |  |
Loans acquired with credit deterioration |  |  | 25 | 53
Other |  |  |  |
Allowance for Loan and Lease Losses [Roll Forward] |  |  |  |
Beginning balance | 2,529 | 172 |  |
Charge-offs | (755) | (256) |  |
Recoveries | 24 | 3 |  |
Provision for loan and lease losses | 1,891 | 264 |  |
Ending balance | 3,689 | 183 |  |
Loans: |  |  |  |
Individually evaluated for impairment |  |  | 108 | 111
Collectively evaluated for impairment |  |  | 152,839 | 73,703
Loans and leases receivable, gross |  |  | 153,153 | 74,035
Allowance for loan losses: |  |  |  |
Individually evaluated for impairment |  |  | 0 | 0
Collectively evaluated for impairment |  |  | 3,537 | 2,390
Total Allowance for loan losses | $ 2,529 | $ 172 | 3,689 | 2,529
Other | Purchased Credit Impaired Loans |  |  |  |
Loans: |  |  |  |
Loans acquired with credit deterioration |  |  | 206 | 221
Loans and leases receivable, gross |  |  | 206 | 221
Allowance for loan losses: |  |  |  |
Loans acquired with credit deterioration |  |  | $ 152 | $ 139

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