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LOANS AND CREDIT QUALITY - Gross Charge-offs by Year and Type (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | ---
Sep. 30, 2024 | Sep. 30, 2023 | Sep. 30, 2024 | Sep. 30, 2023 | Dec. 31, 2023
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |  |  |
Financing receivable, year one, Gross charge-offs |  |  | $ 0 |  | $ 0
Financing receivable, year two, Gross charge-offs |  |  | (24) |  | (106)
Financing receivable, year three, Gross charge-offs |  |  | (5) |  | (206)
Financing receivable, year four, Gross charge-offs |  |  | (458) |  | 0
Financing receivable, year five, Gross charge-offs |  |  | (1,077) |  | (1,136)
Financing receivable, prior to year five, Gross charge-offs, net |  |  | (1,080) |  | 291
Revolving |  |  | (149) |  | (174)
Revolving-term |  |  | 0 |  | (50)
Total | $ (1,562) | $ (635) | (2,793) | $ (1,574) |
Total |  |  |  |  | (1,381)
Commercial loans | Commercial business |  |  |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |  |  |
Financing receivable, year one, Gross charge-offs |  |  | 0 |  | 0
Financing receivable, year two, Gross charge-offs |  |  | 0 |  | 0
Financing receivable, year three, Gross charge-offs |  |  | 0 |  | (184)
Financing receivable, year four, Gross charge-offs |  |  | (458) |  | 0
Financing receivable, year five, Gross charge-offs |  |  | (1,077) |  | (1,136)
Financing receivable, prior to year five, Gross charge-offs, net |  |  | (1,080) |  | 295
Revolving |  |  | (39) |  | 13
Revolving-term |  |  | 0 |  | (50)
Total | (1,534) | (543) | (2,654) | (1,342) |
Total |  |  |  |  | (1,062)
Consumer loans |  |  |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |  |  |
Total | (28) | (92) | (139) | (232) |
Consumer loans | Single family |  |  |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |  |  |
Total | 0 | 0 | 0 | 0 |
Consumer loans | Home equity and other |  |  |  |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |  |  |  |
Financing receivable, year one, Gross charge-offs |  |  | 0 |  | 0
Financing receivable, year two, Gross charge-offs |  |  | (24) |  | (106)
Financing receivable, year three, Gross charge-offs |  |  | (5) |  | (22)
Financing receivable, year four, Gross charge-offs |  |  | 0 |  | 0
Financing receivable, year five, Gross charge-offs |  |  | 0 |  | 0
Financing receivable, prior to year five, Gross charge-offs, net |  |  | 0 |  | (4)
Revolving |  |  | (110) |  | (187)
Revolving-term |  |  | 0 |  | 0
Total | $ (28) | $ (92) | $ (139) | $ (232) | $ (319)

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