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LOANS AND CREDIT QUALITY - TDRs (Details) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2021 USD ($) loan | Sep. 30, 2020 USD ($) loan | Sep. 30, 2021 USD ($) loan | Sep. 30, 2020 USD ($) loan
Financing Receivable, Impaired [Line Items] |  |  |  |
Number of loan modifications - TDR | loan | 14 | 9 | 21 | 35
Recorded investment - TDR | $ 4,289 | $ 2,053 | $ 6,744 | $ 8,748
Related charge-offs - TDR | $ 0 | $ 0 | $ 0 | $ 0
Consumer loans |  |  |  |
Financing Receivable, Impaired [Line Items] |  |  |  |
Number of loan modifications - TDR | loan |  | 9 |  | 33
Recorded investment - TDR |  | $ 2,053 |  | $ 6,945
Related charge-offs - TDR |  | $ 0 |  | $ 0
Consumer loans | Single family |  |  |  |
Financing Receivable, Impaired [Line Items] |  |  |  |
Number of loan modifications - TDR | loan | 14 |  | 21 |
Recorded investment - TDR | $ 4,289 |  | $ 6,744 |
Related charge-offs - TDR | $ 0 |  | $ 0 |
Commercial and Industrial Sector | Commercial loans |  |  |  |
Financing Receivable, Impaired [Line Items] |  |  |  |
Number of loan modifications - TDR | loan |  | 0 |  | 2
Recorded investment - TDR |  | $ 0 |  | $ 1,803
Related charge-offs - TDR |  | $ 0 |  | $ 0
Interest rate reduction |  |  |  |
Financing Receivable, Impaired [Line Items] |  |  |  |
Number of loan modifications - TDR | loan | 10 | 8 | 15 | 23
Recorded investment - TDR | $ 3,284 | $ 1,642 | $ 4,599 | $ 4,878
Related charge-offs - TDR | $ 0 | $ 0 | $ 0 | $ 0
Interest rate reduction | Consumer loans | Single family |  |  |  |
Financing Receivable, Impaired [Line Items] |  |  |  |
Number of loan modifications - TDR | loan | 10 | 8 | 15 | 23
Recorded investment - TDR | $ 3,284 | $ 1,642 | $ 4,599 | $ 4,878
Related charge-offs - TDR | $ 0 | $ 0 | $ 0 | $ 0
Payment restructure |  |  |  |
Financing Receivable, Impaired [Line Items] |  |  |  |
Number of loan modifications - TDR | loan | 4 | 1 | 6 | 12
Recorded investment - TDR | $ 1,005 | $ 411 | $ 2,145 | $ 3,870
Related charge-offs - TDR | $ 0 | $ 0 | $ 0 | $ 0
Payment restructure | Commercial loans | Owner occupied commercial real estate |  |  |  |
Financing Receivable, Impaired [Line Items] |  |  |  |
Number of loan modifications - TDR | loan |  | 0 |  | 1
Recorded investment - TDR |  | $ 0 |  | $ 678
Related charge-offs - TDR |  | $ 0 |  | $ 0
Payment restructure | Commercial loans | Commercial business |  |  |  |
Financing Receivable, Impaired [Line Items] |  |  |  |
Number of loan modifications - TDR | loan |  | 0 |  | 1
Recorded investment - TDR |  | $ 0 |  | $ 1,125
Related charge-offs - TDR |  | $ 0 |  | $ 0
Payment restructure | Consumer loans | Single family |  |  |  |
Financing Receivable, Impaired [Line Items] |  |  |  |
Number of loan modifications - TDR | loan | 4 | 1 | 6 | 10
Recorded investment - TDR | $ 1,005 | $ 411 | $ 2,145 | $ 2,067
Related charge-offs - TDR | $ 0 | $ 0 |  | $ 0
Payment restructure | Commercial and Industrial Sector | Commercial loans |  |  |  |
Financing Receivable, Impaired [Line Items] |  |  |  |
Number of loan modifications - TDR | loan |  | 0 |  | 2
Recorded investment - TDR |  | $ 0 |  | $ 1,803
Related charge-offs - TDR |  | $ 0 |  | $ 0

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