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Loans Receivable and Allowance for Loan Losses - Schedule of Allowance for Loan Losses (Detail) - USD ($) $ in Thousands | 3 Months Ended |  |
--- | --- | --- | ---
Mar. 31, 2018 | Mar. 31, 2017 | Mar. 31, 2018 | Dec. 31, 2017
Allowance for Loan and Lease Losses [Roll Forward] |  |  |  |
Beginning balance | $ 38,015 | $ 37,315 |  |
Charge-offs | (689) | (843) |  |
Recoveries | 56 | 361 |  |
Provision for loan losses | 2,117 | 3,050 |  |
Ending balance | 39,499 | 39,883 |  |
Loans: |  |  |  |
Individually evaluated for impairment |  |  | $ 34,460 | $ 38,435
Collectively evaluated for impairment |  |  | 6,883,709 | 6,702,825
Loans receivable, gross |  |  | 6,944,266 | 6,768,175
Allowance for loan losses: |  |  |  |
Individually evaluated for impairment |  |  | 2,119 | 1,451
Collectively evaluated for impairment |  |  | 33,510 | 32,537
Total Allowance for loan losses | 38,015 | 37,315 | 39,499 | 38,015
Purchased Credit Impaired Loans |  |  |  |
Loans: |  |  |  |
Loans acquired with credit deterioration |  |  | 26,097 | 26,915
Allowance for loan losses: |  |  |  |
Loans acquired with credit deterioration |  |  | 3,870 | 4,027
Multi-family |  |  |  |
Allowance for Loan and Lease Losses [Roll Forward] |  |  |  |
Beginning balance | 12,168 | 11,602 |  |
Charge-offs | 0 | 0 |  |
Recoveries | 0 | 0 |  |
Provision for loan losses | 377 | 681 |  |
Ending balance | 12,545 | 12,283 |  |
Loans: |  |  |  |
Individually evaluated for impairment |  |  | 0 | 0
Collectively evaluated for impairment |  |  | 3,643,539 | 3,500,500
Loans receivable, gross |  |  | 3,645,374 | 3,502,381
Allowance for loan losses: |  |  |  |
Individually evaluated for impairment |  |  | 0 | 0
Collectively evaluated for impairment |  |  | 12,545 | 12,168
Total Allowance for loan losses | 12,168 | 11,602 | 12,545 | 12,168
Multi-family | Purchased Credit Impaired Loans |  |  |  |
Loans: |  |  |  |
Loans acquired with credit deterioration |  |  | 1,835 | 1,881
Allowance for loan losses: |  |  |  |
Loans acquired with credit deterioration |  |  | 0 | 0
Commercial and industrial |  |  |  |
Allowance for Loan and Lease Losses [Roll Forward] |  |  |  |
Beginning balance | 10,918 | 11,050 |  |
Charge-offs | (50) | (198) |  |
Recoveries | 35 | 215 |  |
Provision for loan losses | 834 | 1,942 |  |
Ending balance | 11,737 | 13,009 |  |
Loans: |  |  |  |
Individually evaluated for impairment |  |  | 14,288 | 17,461
Collectively evaluated for impairment |  |  | 1,187,632 | 1,130,865
Loans receivable, gross |  |  | 1,202,641 | 1,149,090
Allowance for loan losses: |  |  |  |
Individually evaluated for impairment |  |  | 986 | 650
Collectively evaluated for impairment |  |  | 10,300 | 9,804
Total Allowance for loan losses | 10,918 | 11,050 | 11,737 | 10,918
Commercial and industrial | Purchased Credit Impaired Loans |  |  |  |
Loans: |  |  |  |
Loans acquired with credit deterioration |  |  | 721 | 764
Allowance for loan losses: |  |  |  |
Loans acquired with credit deterioration |  |  | 451 | 464
Commercial real estate - owner occupied |  |  |  |
Allowance for Loan and Lease Losses [Roll Forward] |  |  |  |
Beginning balance | 3,232 | 2,183 |  |
Charge-offs | (18) | 0 |  |
Recoveries | 0 | 0 |  |
Provision for loan losses | 311 | 211 |  |
Ending balance | 3,525 | 2,394 |  |
Loans: |  |  |  |
Individually evaluated for impairment |  |  | 1,483 | 1,448
Collectively evaluated for impairment |  |  | 490,231 | 472,708
Loans receivable, gross |  |  | 502,150 | 484,728
Allowance for loan losses: |  |  |  |
Individually evaluated for impairment |  |  | 764 | 642
Collectively evaluated for impairment |  |  | 2,751 | 2,580
Total Allowance for loan losses | 3,232 | 2,183 | 3,525 | 3,232
Commercial real estate - owner occupied | Purchased Credit Impaired Loans |  |  |  |
Loans: |  |  |  |
Loans acquired with credit deterioration |  |  | 10,436 | 10,572
Allowance for loan losses: |  |  |  |
Loans acquired with credit deterioration |  |  | 10 | 10
Commercial real estate - non-owner occupied |  |  |  |
Allowance for Loan and Lease Losses [Roll Forward] |  |  |  |
Beginning balance | 7,437 | 7,894 |  |
Charge-offs | 0 | (404) |  |
Recoveries | 0 | 0 |  |
Provision for loan losses | (204) | 357 |  |
Ending balance | 7,233 | 7,847 |  |
Loans: |  |  |  |
Individually evaluated for impairment |  |  | 242 | 160
Collectively evaluated for impairment |  |  | 1,190,591 | 1,213,309
Loans receivable, gross |  |  | 1,195,904 | 1,218,719
Allowance for loan losses: |  |  |  |
Individually evaluated for impairment |  |  | 0 | 0
Collectively evaluated for impairment |  |  | 4,512 | 4,630
Total Allowance for loan losses | 7,437 | 7,894 | 7,233 | 7,437
Commercial real estate - non-owner occupied | Purchased Credit Impaired Loans |  |  |  |
Loans: |  |  |  |
Loans acquired with credit deterioration |  |  | 5,071 | 5,250
Allowance for loan losses: |  |  |  |
Loans acquired with credit deterioration |  |  | 2,721 | 2,807
Construction |  |  |  |
Allowance for Loan and Lease Losses [Roll Forward] |  |  |  |
Beginning balance | 979 | 840 |  |
Charge-offs | 0 | 0 |  |
Recoveries | 11 | 81 |  |
Provision for loan losses | (69) | (36) |  |
Ending balance | 921 | 885 |  |
Loans: |  |  |  |
Individually evaluated for impairment |  |  | 0 | 0
Collectively evaluated for impairment |  |  | 81,101 | 85,393
Loans receivable, gross |  |  | 81,101 | 85,393
Allowance for loan losses: |  |  |  |
Individually evaluated for impairment |  |  | 0 | 0
Collectively evaluated for impairment |  |  | 921 | 979
Total Allowance for loan losses | 979 | 840 | 921 | 979
Construction | Purchased Credit Impaired Loans |  |  |  |
Loans: |  |  |  |
Loans acquired with credit deterioration |  |  | 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 | 2,929 | 3,342 |  |
Charge-offs | (365) | (221) |  |
Recoveries | 7 | 21 |  |
Provision for loan losses | 608 | (62) |  |
Ending balance | 3,179 | 3,080 |  |
Loans: |  |  |  |
Individually evaluated for impairment |  |  | 8,242 | 9,247
Collectively evaluated for impairment |  |  | 212,289 | 219,162
Loans receivable, gross |  |  | 225,839 | 234,090
Allowance for loan losses: |  |  |  |
Individually evaluated for impairment |  |  | 365 | 155
Collectively evaluated for impairment |  |  | 2,274 | 2,177
Total Allowance for loan losses | 2,929 | 3,342 | 3,179 | 2,929
Residential real estate | Purchased Credit Impaired Loans |  |  |  |
Loans: |  |  |  |
Loans acquired with credit deterioration |  |  | 5,308 | 5,681
Allowance for loan losses: |  |  |  |
Loans acquired with credit deterioration |  |  | 540 | 597
Manufactured housing |  |  |  |
Allowance for Loan and Lease Losses [Roll Forward] |  |  |  |
Beginning balance | 180 | 286 |  |
Charge-offs | 0 | 0 |  |
Recoveries | 0 | 0 |  |
Provision for loan losses | (4) | (2) |  |
Ending balance | 176 | 284 |  |
Loans: |  |  |  |
Individually evaluated for impairment |  |  | 10,108 | 10,089
Collectively evaluated for impairment |  |  | 75,103 | 77,587
Loans receivable, gross |  |  | 87,687 | 90,227
Allowance for loan losses: |  |  |  |
Individually evaluated for impairment |  |  | 4 | 4
Collectively evaluated for impairment |  |  | 82 | 82
Total Allowance for loan losses | 180 | 286 | 176 | 180
Manufactured housing | Purchased Credit Impaired Loans |  |  |  |
Loans: |  |  |  |
Loans acquired with credit deterioration |  |  | 2,476 | 2,551
Allowance for loan losses: |  |  |  |
Loans acquired with credit deterioration |  |  | 90 | 94
Other |  |  |  |
Allowance for Loan and Lease Losses [Roll Forward] |  |  |  |
Beginning balance | 172 | 118 |  |
Charge-offs | (256) | (20) |  |
Recoveries | 3 | 44 |  |
Provision for loan losses | 264 | (41) |  |
Ending balance | 183 | 101 |  |
Loans: |  |  |  |
Individually evaluated for impairment |  |  | 97 | 30
Collectively evaluated for impairment |  |  | 3,223 | 3,301
Loans receivable, gross |  |  | 3,570 | 3,547
Allowance for loan losses: |  |  |  |
Individually evaluated for impairment |  |  | 0 | 0
Collectively evaluated for impairment |  |  | 125 | 117
Total Allowance for loan losses | $ 172 | $ 118 | 183 | 172
Other | Purchased Credit Impaired Loans |  |  |  |
Loans: |  |  |  |
Loans acquired with credit deterioration |  |  | 250 | 216
Allowance for loan losses: |  |  |  |
Loans acquired with credit deterioration |  |  | $ 58 | $ 55

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- Definition A valuation allowance for financing receivables that are expected to be uncollectible. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953423-111524 + Details
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- Definition The valuation allowance for financing receivables that are expected to be uncollectible that were collectively evaluated for impairment. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (g) -URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953423-111524 + Details
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- Definition Amount of allowance to cover probable credit losses on loans and leases. Includes carryover of or adjustments to the allowance for loan losses in connection with business combinations. Excludes allowance for loans and leases covered under loss sharing agreements. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (g) -URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953423-111524 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953423-111524 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.7(d)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section S99 -Paragraph 4 -Subparagraph (SAB Topic 6.L.1) -URI http://asc.fasb.org/extlink&oid=27010918&loc=d3e74567-122707 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (b)(1)(ii) -URI http://asc.fasb.org/extlink&oid=82894903&loc=d3e15032-111544 + Details
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