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ALLOWANCE FOR CREDIT LOSSES AND CREDIT QUALITY - Allowance for loan losses by portfolio segment (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2022 | Jun. 30, 2021 | Jun. 30, 2022 | Jun. 30, 2021
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |
Beginning balance | $ 67,526 | $ 71,844 | $ 67,773 | $ 61,408
Provision for credit losses | 0 | (1,700) | 417 | (223)
Loans charged-off | (98) | (267) | (838) | (503)
Recoveries | 95 | 1,836 | 171 | 1,981
Net loans (charged-off) recovered | (3) | 1,569 | (667) | 1,478
Ending balance | 67,523 | 71,713 | 67,523 | 71,713
Impact of adopting ASC 326 | ASU 2016-13 |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |
Beginning balance |  |  |  | 9,050
Unallocated |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |
Beginning balance | 482 | 597 | 450 | 3,139
Provision for credit losses | 165 | (91) | 197 | 248
Loans charged-off | 0 | 0 | 0 | 0
Recoveries | 0 | 0 | 0 | 0
Net loans (charged-off) recovered | 0 | 0 | 0 | 0
Ending balance | 647 | 506 | 647 | 506
Unallocated | Impact of adopting ASC 326 | ASU 2016-13 |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |
Beginning balance |  |  |  | (2,881)
Commercial Portfolio Segment | Commercial and industrial loans: |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |
Beginning balance | 31,322 | 32,052 | 30,595 | 28,333
Provision for credit losses | (139) | (187) | 591 | (727)
Loans charged-off | (13) | (162) | (32) | (249)
Recoveries | 25 | 1,427 | 41 | 1,461
Net loans (charged-off) recovered | 12 | 1,265 | 9 | 1,212
Ending balance | 31,195 | 33,130 | 31,195 | 33,130
Commercial Portfolio Segment | Commercial and industrial loans: | Impact of adopting ASC 326 | ASU 2016-13 |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |
Beginning balance |  |  |  | 4,312
Commercial Portfolio Segment | Commercial Real Estate and Multifamily Residential |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |
Beginning balance | 26,257 | 29,445 | 26,535 | 22,907
Provision for credit losses | 191 | (1,160) | 510 | 1,125
Loans charged-off | 0 | 0 | (597) | (71)
Recoveries | 0 | 6 | 0 | 14
Net loans (charged-off) recovered | 0 | 6 | (597) | (57)
Ending balance | 26,448 | 28,291 | 26,448 | 28,291
Commercial Portfolio Segment | Commercial Real Estate and Multifamily Residential | Impact of adopting ASC 326 | ASU 2016-13 |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |
Beginning balance |  |  |  | 4,316
Commercial Portfolio Segment | Agri-business and agricultural loans: |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |
Beginning balance | 4,761 | 3,901 | 5,034 | 3,043
Provision for credit losses | (8) | (291) | (281) | (493)
Loans charged-off | 0 | 0 | 0 | 0
Recoveries | 0 | 320 | 0 | 320
Net loans (charged-off) recovered | 0 | 320 | 0 | 320
Ending balance | 4,753 | 3,930 | 4,753 | 3,930
Commercial Portfolio Segment | Agri-business and agricultural loans: | Impact of adopting ASC 326 | ASU 2016-13 |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |
Beginning balance |  |  |  | 1,060
Commercial Portfolio Segment | Other Commercial |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |
Beginning balance | 1,058 | 1,172 | 1,146 | 416
Provision for credit losses | (345) | 126 | (433) | (59)
Loans charged-off | 0 | 0 | 0 | 0
Recoveries | 0 | 0 | 0 | 0
Net loans (charged-off) recovered | 0 | 0 | 0 | 0
Ending balance | 713 | 1,298 | 713 | 1,298
Commercial Portfolio Segment | Other Commercial | Impact of adopting ASC 326 | ASU 2016-13 |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |
Beginning balance |  |  |  | 941
Consumer Portfolio Segment | Consumer 1-4 Family Mortgage |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |
Beginning balance | 2,606 | 3,384 | 2,866 | 2,619
Provision for credit losses | 34 | (221) | (214) | (454)
Loans charged-off | 0 | (32) | (22) | (38)
Recoveries | 34 | 34 | 44 | 85
Net loans (charged-off) recovered | 34 | 2 | 22 | 47
Ending balance | 2,674 | 3,165 | 2,674 | 3,165
Consumer Portfolio Segment | Consumer 1-4 Family Mortgage | Impact of adopting ASC 326 | ASU 2016-13 |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |
Beginning balance |  |  |  | 953
Consumer Portfolio Segment | Other Consumer |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |
Beginning balance | 1,040 | 1,293 | 1,147 | 951
Provision for credit losses | 102 | 124 | 47 | 137
Loans charged-off | (85) | (73) | (187) | (145)
Recoveries | 36 | 49 | 86 | 101
Net loans (charged-off) recovered | (49) | (24) | (101) | (44)
Ending balance | $ 1,093 | $ 1,393 | $ 1,093 | 1,393
Consumer Portfolio Segment | Other Consumer | Impact of adopting ASC 326 | ASU 2016-13 |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |
Beginning balance |  |  |  | $ 349

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