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ALLOWANCE FOR CREDIT LOSSES - Summary of allowance for credit lost by portfolio segment (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2023 | Jun. 30, 2022 | Jun. 30, 2023 | Jun. 30, 2022
Financing Receivable, Allowance for Credit Loss [Roll Forward] |  |  |  |
Balance at beginning of period | $ 14,153 | $ 13,465 | $ 13,400 | $ 14,425
Charge-offs | (13) | (9) | (18) | (19)
Recoveries | 0 | 0 | 1 | 2
Provision for (recovery of) credit loss on loans | 273 | 594 | 362 | (358)
Balance at end of period | 14,413 | 14,050 | 14,413 | 14,050
Cumulative Effect, Period of Adoption, Adjustment |  |  |  |
Financing Receivable, Allowance for Credit Loss [Roll Forward] |  |  |  |
Balance at beginning of period | 0 | 0 | 668 | 0
Residential Portfolio Segment | Residential one-to-four family |  |  |  |
Financing Receivable, Allowance for Credit Loss [Roll Forward] |  |  |  |
Balance at beginning of period | 2,056 | 2,610 | 2,264 | 2,822
Charge-offs | 0 | 0 | 0 | 0
Recoveries | 0 | 0 | 0 | 0
Provision for (recovery of) credit loss on loans | (62) | (28) | (87) | (240)
Balance at end of period | 1,994 | 2,582 | 1,994 | 2,582
Residential Portfolio Segment | Residential one-to-four family | Cumulative Effect, Period of Adoption, Adjustment |  |  |  |
Financing Receivable, Allowance for Credit Loss [Roll Forward] |  |  |  |
Balance at beginning of period |  |  | (183) |
Residential Portfolio Segment | Multifamily |  |  |  |
Financing Receivable, Allowance for Credit Loss [Roll Forward] |  |  |  |
Balance at beginning of period | 7,191 | 4,776 | 5,491 | 5,263
Charge-offs | 0 | 0 | 0 | 0
Recoveries | 0 | 0 | 0 | 0
Provision for (recovery of) credit loss on loans | (174) | 363 | (531) | (124)
Balance at end of period | 7,017 | 5,139 | 7,017 | 5,139
Residential Portfolio Segment | Multifamily | Cumulative Effect, Period of Adoption, Adjustment |  |  |  |
Financing Receivable, Allowance for Credit Loss [Roll Forward] |  |  |  |
Balance at beginning of period |  |  | 2,057 |
Nonresidential Portfolio Segment | Non-residential |  |  |  |
Financing Receivable, Allowance for Credit Loss [Roll Forward] |  |  |  |
Balance at beginning of period | 3,570 | 3,465 | 3,357 | 2,846
Charge-offs | 0 | 0 | 0 | 0
Recoveries | 0 | 0 | 0 | 0
Provision for (recovery of) credit loss on loans | 243 | 175 | 310 | 794
Balance at end of period | 3,813 | 3,640 | 3,813 | 3,640
Nonresidential Portfolio Segment | Non-residential | Cumulative Effect, Period of Adoption, Adjustment |  |  |  |
Financing Receivable, Allowance for Credit Loss [Roll Forward] |  |  |  |
Balance at beginning of period |  |  | 146 |
Commercial Portfolio Segment | Construction |  |  |  |
Financing Receivable, Allowance for Credit Loss [Roll Forward] |  |  |  |
Balance at beginning of period | 1,190 | 1,905 | 1,697 | 2,678
Charge-offs | 0 | 0 | 0 | 0
Recoveries | 0 | 0 | 0 | 0
Provision for (recovery of) credit loss on loans | 238 | 189 | 563 | (584)
Balance at end of period | 1,428 | 2,094 | 1,428 | 2,094
Commercial Portfolio Segment | Construction | Cumulative Effect, Period of Adoption, Adjustment |  |  |  |
Financing Receivable, Allowance for Credit Loss [Roll Forward] |  |  |  |
Balance at beginning of period |  |  | (832) |
Commercial and industrial | Commercial and industrial |  |  |  |
Financing Receivable, Allowance for Credit Loss [Roll Forward] |  |  |  |
Balance at beginning of period | 100 | 71 | 47 | 51
Charge-offs | 0 | 0 | 0 | 0
Recoveries | 0 | 0 | 0 | 0
Provision for (recovery of) credit loss on loans | 11 | (29) | 87 | (9)
Balance at end of period | 111 | 42 | 111 | 42
Commercial and industrial | Commercial and industrial | Cumulative Effect, Period of Adoption, Adjustment |  |  |  |
Financing Receivable, Allowance for Credit Loss [Roll Forward] |  |  |  |
Balance at beginning of period |  |  | (23) |
Junior Lien Portfolio Segment | Junior liens |  |  |  |
Financing Receivable, Allowance for Credit Loss [Roll Forward] |  |  |  |
Balance at beginning of period | 46 | 549 | 451 | 636
Charge-offs | 0 | 0 | 0 | 0
Recoveries | 0 | 0 | 0 | 0
Provision for (recovery of) credit loss on loans | 4 | (81) | 4 | (168)
Balance at end of period | 50 | 468 | 50 | 468
Junior Lien Portfolio Segment | Junior liens | Cumulative Effect, Period of Adoption, Adjustment |  |  |  |
Financing Receivable, Allowance for Credit Loss [Roll Forward] |  |  |  |
Balance at beginning of period |  |  | (405) |
Consumer Portfolio Segment | Consumer and other |  |  |  |
Financing Receivable, Allowance for Credit Loss [Roll Forward] |  |  |  |
Balance at beginning of period | 0 | 0 | 0 | 38
Charge-offs | (13) | (9) | (18) | (19)
Recoveries | 0 | 0 | 1 | 2
Provision for (recovery of) credit loss on loans | 13 | 9 | 16 | (21)
Balance at end of period | 0 | 0 | 0 | 0
Consumer Portfolio Segment | Consumer and other | Cumulative Effect, Period of Adoption, Adjustment |  |  |  |
Financing Receivable, Allowance for Credit Loss [Roll Forward] |  |  |  |
Balance at beginning of period |  |  | 1 |
Unallocated Financing Receivables |  |  |  |
Financing Receivable, Allowance for Credit Loss [Roll Forward] |  |  |  |
Balance at beginning of period |  | 89 | 93 | 91
Charge-offs |  | 0 | 0 | 0
Recoveries |  | 0 | 0 | 0
Provision for (recovery of) credit loss on loans |  | (4) | 0 | (6)
Balance at end of period | $ 0 | $ 85 | 0 | $ 85
Unallocated Financing Receivables | Cumulative Effect, Period of Adoption, Adjustment |  |  |  |
Financing Receivable, Allowance for Credit Loss [Roll Forward] |  |  |  |
Balance at beginning of period |  |  | $ (93) |

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