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Loans- Schedule of Activity in Allowance for Loan Losses (Detail) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2019 | Sep. 30, 2019 | Jun. 30, 2019 | Mar. 31, 2019 | Dec. 31, 2018 | Sep. 30, 2018 | Jun. 30, 2018 | Mar. 31, 2018 | Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Financing Receivable, Allowance for Credit Loss [Roll Forward] |  |  |  |  |  |  |  |  |  |  |
Beginning Balance |  |  |  | $ 16,348 |  |  |  | $ 14,807 | $ 16,348 | $ 14,807 | $ 12,511
Charge-offs |  |  |  |  |  |  |  |  | (1,577) | (2,581) | (464)
Recoveries |  |  |  |  |  |  |  |  | 83 | 179 | 443
Provision for loan losses | $ 713 | $ 1,146 | $ 765 | 390 | $ 1,612 | $ 786 | $ 581 | 964 | 3,014 | 3,943 | 2,317
Ending Balance | 17,868 |  |  |  | 16,348 |  |  |  | 17,868 | 16,348 | 14,807
Originated loans |  |  |  |  |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Roll Forward] |  |  |  |  |  |  |  |  |  |  |
Beginning Balance |  |  |  | 14,860 |  |  |  | 14,303 | 14,860 | 14,303 | 12,220
Charge-offs |  |  |  |  |  |  |  |  | (1,428) | (2,581) | (464)
Recoveries |  |  |  |  |  |  |  |  | 83 | 179 | 443
Provision for loan losses |  |  |  |  |  |  |  |  | 2,576 | 2,959 | 2,104
Ending Balance | 16,091 |  |  |  | 14,860 |  |  |  | 16,091 | 14,860 | 14,303
Acquired loans |  |  |  |  |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Roll Forward] |  |  |  |  |  |  |  |  |  |  |
Beginning Balance |  |  |  | 1,488 |  |  |  | 504 | 1,488 | 504 | 291
Charge-offs |  |  |  |  |  |  |  |  | (149) | 0 | 0
Recoveries |  |  |  |  |  |  |  |  | 0 | 0 | 0
Provision for loan losses |  |  |  |  |  |  |  |  | 438 | 984 | 213
Ending Balance | 1,777 |  |  |  | 1,488 |  |  |  | 1,777 | 1,488 | 504
One- to four-family first mortgage |  |  |  |  |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Roll Forward] |  |  |  |  |  |  |  |  |  |  |
Beginning Balance |  |  |  | 2,136 |  |  |  | 1,663 | 2,136 | 1,663 | 1,511
Charge-offs |  |  |  |  |  |  |  |  | (4) | (1) | (29)
Recoveries |  |  |  |  |  |  |  |  | 0 | 0 | 0
Provision for loan losses |  |  |  |  |  |  |  |  | 583 | 474 | 181
Ending Balance | 2,715 |  |  |  | 2,136 |  |  |  | 2,715 | 2,136 | 1,663
One- to four-family first mortgage | Originated loans |  |  |  |  |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Roll Forward] |  |  |  |  |  |  |  |  |  |  |
Beginning Balance |  |  |  | 1,937 |  |  |  | 1,574 | 1,937 | 1,574 | 1,436
Charge-offs |  |  |  |  |  |  |  |  | (4) | (1) | (29)
Recoveries |  |  |  |  |  |  |  |  | 0 | 0 | 0
Provision for loan losses |  |  |  |  |  |  |  |  | 113 | 364 | 167
Ending Balance | 2,046 |  |  |  | 1,937 |  |  |  | 2,046 | 1,937 | 1,574
One- to four-family first mortgage | Acquired loans |  |  |  |  |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Roll Forward] |  |  |  |  |  |  |  |  |  |  |
Beginning Balance |  |  |  | 199 |  |  |  | 89 | 199 | 89 | 75
Charge-offs |  |  |  |  |  |  |  |  | 0 | 0 | 0
Recoveries |  |  |  |  |  |  |  |  | 0 | 0 | 0
Provision for loan losses |  |  |  |  |  |  |  |  | 470 | 110 | 14
Ending Balance | 669 |  |  |  | 199 |  |  |  | 669 | 199 | 89
Home equity loans and lines |  |  |  |  |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Roll Forward] |  |  |  |  |  |  |  |  |  |  |
Beginning Balance |  |  |  | 1,079 |  |  |  | 1,102 | 1,079 | 1,102 | 728
Charge-offs |  |  |  |  |  |  |  |  | (42) | 0 | (10)
Recoveries |  |  |  |  |  |  |  |  | 16 | 5 | 20
Provision for loan losses |  |  |  |  |  |  |  |  | 31 | (28) | 364
Ending Balance | 1,084 |  |  |  | 1,079 |  |  |  | 1,084 | 1,079 | 1,102
Home equity loans and lines | Originated loans |  |  |  |  |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Roll Forward] |  |  |  |  |  |  |  |  |  |  |
Beginning Balance |  |  |  | 1,031 |  |  |  | 1,024 | 1,031 | 1,024 | 654
Charge-offs |  |  |  |  |  |  |  |  | (42) | 0 | (10)
Recoveries |  |  |  |  |  |  |  |  | 16 | 5 | 20
Provision for loan losses |  |  |  |  |  |  |  |  | 49 | 2 | 360
Ending Balance | 1,054 |  |  |  | 1,031 |  |  |  | 1,054 | 1,031 | 1,024
Home equity loans and lines | Acquired loans |  |  |  |  |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Roll Forward] |  |  |  |  |  |  |  |  |  |  |
Beginning Balance |  |  |  | 48 |  |  |  | 78 | 48 | 78 | 74
Charge-offs |  |  |  |  |  |  |  |  | 0 | 0 | 0
Recoveries |  |  |  |  |  |  |  |  | 0 | 0 | 0
Provision for loan losses |  |  |  |  |  |  |  |  | (18) | (30) | 4
Ending Balance | 30 |  |  |  | 48 |  |  |  | 30 | 48 | 78
Commercial real estate |  |  |  |  |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Roll Forward] |  |  |  |  |  |  |  |  |  |  |
Beginning Balance |  |  |  | 6,125 |  |  |  | 4,906 | 6,125 | 4,906 | 4,177
Charge-offs |  |  |  |  |  |  |  |  | (360) | 0 | (3)
Recoveries |  |  |  |  |  |  |  |  | 0 | 0 | 0
Provision for loan losses |  |  |  |  |  |  |  |  | 776 | 1,219 | 732
Ending Balance | 6,541 |  |  |  | 6,125 |  |  |  | 6,541 | 6,125 | 4,906
Commercial real estate | Originated loans |  |  |  |  |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Roll Forward] |  |  |  |  |  |  |  |  |  |  |
Beginning Balance |  |  |  | 5,756 |  |  |  | 4,766 | 5,756 | 4,766 | 4,177
Charge-offs |  |  |  |  |  |  |  |  | (360) | 0 | (3)
Recoveries |  |  |  |  |  |  |  |  | 0 | 0 | 0
Provision for loan losses |  |  |  |  |  |  |  |  | 785 | 990 | 592
Ending Balance | 6,181 |  |  |  | 5,756 |  |  |  | 6,181 | 5,756 | 4,766
Commercial real estate | Acquired loans |  |  |  |  |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Roll Forward] |  |  |  |  |  |  |  |  |  |  |
Beginning Balance |  |  |  | 369 |  |  |  | 140 | 369 | 140 | 0
Charge-offs |  |  |  |  |  |  |  |  | 0 | 0 | 0
Recoveries |  |  |  |  |  |  |  |  | 0 | 0 | 0
Provision for loan losses |  |  |  |  |  |  |  |  | (9) | 229 | 140
Ending Balance | 360 |  |  |  | 369 |  |  |  | 360 | 369 | 140
Construction and land |  |  |  |  |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Roll Forward] |  |  |  |  |  |  |  |  |  |  |
Beginning Balance |  |  |  | 2,285 |  |  |  | 1,749 | 2,285 | 1,749 | 1,782
Charge-offs |  |  |  |  |  |  |  |  | (6) | 0 | 0
Recoveries |  |  |  |  |  |  |  |  | 0 | 0 | 0
Provision for loan losses |  |  |  |  |  |  |  |  | 391 | 536 | (33)
Ending Balance | 2,670 |  |  |  | 2,285 |  |  |  | 2,670 | 2,285 | 1,749
Construction and land | Originated loans |  |  |  |  |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Roll Forward] |  |  |  |  |  |  |  |  |  |  |
Beginning Balance |  |  |  | 2,280 |  |  |  | 1,742 | 2,280 | 1,742 | 1,763
Charge-offs |  |  |  |  |  |  |  |  | (6) | 0 | 0
Recoveries |  |  |  |  |  |  |  |  | 0 | 0 | 0
Provision for loan losses |  |  |  |  |  |  |  |  | 146 | 538 | (21)
Ending Balance | 2,420 |  |  |  | 2,280 |  |  |  | 2,420 | 2,280 | 1,742
Construction and land | Acquired loans |  |  |  |  |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Roll Forward] |  |  |  |  |  |  |  |  |  |  |
Beginning Balance |  |  |  | 5 |  |  |  | 7 | 5 | 7 | 19
Charge-offs |  |  |  |  |  |  |  |  | 0 | 0 | 0
Recoveries |  |  |  |  |  |  |  |  | 0 | 0 | 0
Provision for loan losses |  |  |  |  |  |  |  |  | 245 | (2) | (12)
Ending Balance | 250 |  |  |  | 5 |  |  |  | 250 | 5 | 7
Multi-family residential |  |  |  |  |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Roll Forward] |  |  |  |  |  |  |  |  |  |  |
Beginning Balance |  |  |  | 550 |  |  |  | 355 | 550 | 355 | 361
Charge-offs |  |  |  |  |  |  |  |  | 0 | 0 | 0
Recoveries |  |  |  |  |  |  |  |  | 0 | 0 | 0
Provision for loan losses |  |  |  |  |  |  |  |  | 22 | 195 | (6)
Ending Balance | 572 |  |  |  | 550 |  |  |  | 572 | 550 | 355
Multi-family residential | Originated loans |  |  |  |  |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Roll Forward] |  |  |  |  |  |  |  |  |  |  |
Beginning Balance |  |  |  | 522 |  |  |  | 355 | 522 | 355 | 361
Charge-offs |  |  |  |  |  |  |  |  | 0 | 0 | 0
Recoveries |  |  |  |  |  |  |  |  | 0 | 0 | 0
Provision for loan losses |  |  |  |  |  |  |  |  | 50 | 167 | (6)
Ending Balance | 572 |  |  |  | 522 |  |  |  | 572 | 522 | 355
Multi-family residential | Acquired loans |  |  |  |  |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Roll Forward] |  |  |  |  |  |  |  |  |  |  |
Beginning Balance |  |  |  | 28 |  |  |  | 0 | 28 | 0 | 0
Charge-offs |  |  |  |  |  |  |  |  | 0 | 0 | 0
Recoveries |  |  |  |  |  |  |  |  | 0 | 0 | 0
Provision for loan losses |  |  |  |  |  |  |  |  | (28) | 28 | 0
Ending Balance | 0 |  |  |  | 28 |  |  |  | 0 | 28 | 0
Commercial and industrial |  |  |  |  |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Roll Forward] |  |  |  |  |  |  |  |  |  |  |
Beginning Balance |  |  |  | 3,228 |  |  |  | 4,530 | 3,228 | 4,530 | 3,439
Charge-offs |  |  |  |  |  |  |  |  | (893) | (2,506) | (358)
Recoveries |  |  |  |  |  |  |  |  | 25 | 158 | 408
Provision for loan losses |  |  |  |  |  |  |  |  | 1,334 | 1,046 | 1,041
Ending Balance | 3,694 |  |  |  | 3,228 |  |  |  | 3,694 | 3,228 | 4,530
Commercial and industrial | Originated loans |  |  |  |  |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Roll Forward] |  |  |  |  |  |  |  |  |  |  |
Beginning Balance |  |  |  | 2,862 |  |  |  | 4,346 | 2,862 | 4,346 | 3,316
Charge-offs |  |  |  |  |  |  |  |  | (888) | (2,506) | (358)
Recoveries |  |  |  |  |  |  |  |  | 25 | 158 | 408
Provision for loan losses |  |  |  |  |  |  |  |  | 1,373 | 864 | 980
Ending Balance | 3,372 |  |  |  | 2,862 |  |  |  | 3,372 | 2,862 | 4,346
Commercial and industrial | Acquired loans |  |  |  |  |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Roll Forward] |  |  |  |  |  |  |  |  |  |  |
Beginning Balance |  |  |  | 366 |  |  |  | 184 | 366 | 184 | 123
Charge-offs |  |  |  |  |  |  |  |  | (5) | 0 | 0
Recoveries |  |  |  |  |  |  |  |  | 0 | 0 | 0
Provision for loan losses |  |  |  |  |  |  |  |  | (39) | 182 | 61
Ending Balance | 322 |  |  |  | 366 |  |  |  | 322 | 366 | 184
Consumer |  |  |  |  |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Roll Forward] |  |  |  |  |  |  |  |  |  |  |
Beginning Balance |  |  |  | 945 |  |  |  | 502 | 945 | 502 | 513
Charge-offs |  |  |  |  |  |  |  |  | (272) | (74) | (64)
Recoveries |  |  |  |  |  |  |  |  | 42 | 16 | 15
Provision for loan losses |  |  |  |  |  |  |  |  | (123) | 501 | 38
Ending Balance | 592 |  |  |  | 945 |  |  |  | 592 | 945 | 502
Consumer | Originated loans |  |  |  |  |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Roll Forward] |  |  |  |  |  |  |  |  |  |  |
Beginning Balance |  |  |  | 472 |  |  |  | 496 | 472 | 496 | 513
Charge-offs |  |  |  |  |  |  |  |  | (128) | (74) | (64)
Recoveries |  |  |  |  |  |  |  |  | 42 | 16 | 15
Provision for loan losses |  |  |  |  |  |  |  |  | 60 | 34 | 32
Ending Balance | 446 |  |  |  | 472 |  |  |  | 446 | 472 | 496
Consumer | Acquired loans |  |  |  |  |  |  |  |  |  |  |
Financing Receivable, Allowance for Credit Loss [Roll Forward] |  |  |  |  |  |  |  |  |  |  |
Beginning Balance |  |  |  | $ 473 |  |  |  | $ 6 | 473 | 6 | 0
Charge-offs |  |  |  |  |  |  |  |  | (144) | 0 | 0
Recoveries |  |  |  |  |  |  |  |  | 0 | 0 | 0
Provision for loan losses |  |  |  |  |  |  |  |  | (183) | 467 | 6
Ending Balance | $ 146 |  |  |  | $ 473 |  |  |  | $ 146 | $ 473 | $ 6

X
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