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LOANS AND CREDIT QUALITY - Allowance for Credit Losses (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
ACL for LHFI |  |  |
Beginning balance | $ 64,294 | $ 41,772 | $ 41,470
Provision for credit losses | (15,816) | 21,843 | (122)
Net (charge-offs) recoveries | (1,355) | (1,164) | 424
Ending balance | 47,123 | 64,294 | 41,772
Allowance for unfunded commitments |  |  |
Beginning balance | 1,588 | 1,065 | 1,443
Provision for credit losses | 816 | (1,374) | (378)
Allowance for credit losses-loans | (15,816) | 21,843 | (122)
Ending balance | 2,404 | 1,588 | 1,065
Total | $ (15,000) | 20,469 | (500)
Cumulative Effect, Period of Adoption, Adjustment |  |  |
ACL for LHFI |  |  |
Beginning balance |  | 1,843 |
Ending balance |  |  | 1,843
Allowance for unfunded commitments |  |  |
Beginning balance |  | $ 1,897 |
Ending balance |  |  | $ 1,897

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- Definition Amount, after recovery, of writeoff of financing receivable, charged against allowance for credit loss. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=124255953&loc=SL82919249-210447 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 55 -Paragraph 79 -URI http://asc.fasb.org/extlink&oid=124267575&loc=SL82922352-210448 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher SEC -Name Regulation S-K (SK) -Number 229 -Section 1405 -Paragraph (a) -Subparagraph (4) + Details
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