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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 | 9 Months Ended
--- | --- | ---
Sep. 30, 2022 | Sep. 30, 2021 | Sep. 30, 2022 | Sep. 30, 2021
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |
Beginning balance | $ 67,523 | $ 71,713 | $ 67,773 | $ 61,408
Provision for credit losses | 0 | 1,300 | 417 | 1,077
Loans charged-off | (373) | (90) | (1,211) | (593)
Recoveries | 89 | 125 | 260 | 2,106
Net loans (charged-off) recovered | (284) | 35 | (951) | 1,513
Ending balance | 67,239 | 73,048 | 67,239 | 73,048
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 | 647 | 506 | 450 | 3,139
Provision for credit losses | (22) | (126) | 175 | 122
Loans charged-off | 0 | 0 | 0 | 0
Recoveries | 0 | 0 | 0 | 0
Net loans (charged-off) recovered | 0 | 0 | 0 | 0
Ending balance | 625 | 380 | 625 | 380
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 |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |
Beginning balance | 31,195 | 33,130 | 30,595 | 28,333
Provision for credit losses | 1,357 | 3,507 | 1,948 | 2,780
Loans charged-off | (222) | (5) | (254) | (254)
Recoveries | 18 | 44 | 59 | 1,505
Net loans (charged-off) recovered | (204) | 39 | (195) | 1,251
Ending balance | 32,348 | 36,676 | 32,348 | 36,676
Commercial Portfolio Segment | Commercial and Industrial | 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 | 26,448 | 28,291 | 26,535 | 22,907
Provision for credit losses | (678) | (1,545) | (168) | (420)
Loans charged-off | 0 | 0 | (597) | (71)
Recoveries | 25 | 0 | 25 | 14
Net loans (charged-off) recovered | 25 | 0 | (572) | (57)
Ending balance | 25,795 | 26,746 | 25,795 | 26,746
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 |  |  |  |
Financing Receivable, Allowance for Credit Loss [Line Items] |  |  |  |
Beginning balance | 4,753 | 3,930 | 5,034 | 3,043
Provision for credit losses | (547) | (244) | (828) | (737)
Loans charged-off | 0 | 0 | 0 | 0
Recoveries | 0 | 0 | 0 | 320
Net loans (charged-off) recovered | 0 | 0 | 0 | 320
Ending balance | 4,206 | 3,686 | 4,206 | 3,686
Commercial Portfolio Segment | Agri-business and Agricultural | 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 | 713 | 1,298 | 1,146 | 416
Provision for credit losses | 16 | 89 | (417) | 30
Loans charged-off | 0 | 0 | 0 | 0
Recoveries | 0 | 0 | 0 | 0
Net loans (charged-off) recovered | 0 | 0 | 0 | 0
Ending balance | 729 | 1,387 | 729 | 1,387
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 | 2,674 | 3,165 | 2,866 | 2,619
Provision for credit losses | (197) | (265) | (411) | (719)
Loans charged-off | (20) | (13) | (42) | (51)
Recoveries | 3 | 14 | 47 | 99
Net loans (charged-off) recovered | (17) | 1 | 5 | 48
Ending balance | 2,460 | 2,901 | 2,460 | 2,901
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 | 1,093 | 1,393 | 1,147 | 951
Provision for credit losses | 71 | (116) | 118 | 21
Loans charged-off | (131) | (72) | (318) | (217)
Recoveries | 43 | 67 | 129 | 168
Net loans (charged-off) recovered | (88) | (5) | (189) | (49)
Ending balance | $ 1,076 | $ 1,272 | $ 1,076 | 1,272
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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