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ALLOWANCE FOR LOAN LOSSES AND CREDIT QUALITY - Allowance for loan losses by portfolio segment (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Financing Receivable, Allowance for Credit Losses |  |  |
Beginning balance | $ 50,652 | $ 48,453 | $ 47,121
Provision for loan losses | 14,770 | 3,235 | 6,400
Loans charged-off | (5,253) | (1,910) | (6,111)
Recoveries | 1,239 | 874 | 1,043
Net loans (charged-off) recovered | (4,014) | (1,036) | (5,068)
Ending balance | 61,408 | 50,652 | 48,453
Commercial and Industrial Loans [Member] |  |  |
Financing Receivable, Allowance for Credit Losses |  |  |
Beginning balance | 25,789 | 22,518 | 21,097
Provision for loan losses | 6,640 | 4,259 | 5,884
Loans charged-off | (4,524) | (1,447) | (5,215)
Recoveries | 428 | 459 | 752
Net loans (charged-off) recovered | (4,096) | (988) | (4,463)
Ending balance | 28,333 | 25,789 | 22,518
Commercial Real Estate and Multi-family Residential Loans |  |  |
Financing Receivable, Allowance for Credit Losses |  |  |
Beginning balance | 15,796 | 15,393 | 14,714
Provision for loan losses | 6,868 | 259 | 1,140
Loans charged-off | (72) | (17) | (491)
Recoveries | 315 | 161 | 30
Net loans (charged-off) recovered | 243 | 144 | (461)
Ending balance | 22,907 | 15,796 | 15,393
Agri-business and Agricultural Loans [Member] |  |  |
Financing Receivable, Allowance for Credit Losses |  |  |
Beginning balance | 3,869 | 4,305 | 4,920
Provision for loan losses | (826) | (444) | (657)
Loans charged-off | 0 | 0 | 0
Recoveries | 0 | 8 | 42
Net loans (charged-off) recovered | 0 | 8 | 42
Ending balance | 3,043 | 3,869 | 4,305
Other Commercial |  |  |
Financing Receivable, Allowance for Credit Losses |  |  |
Beginning balance | 447 | 368 | 577
Provision for loan losses | (31) | 79 | (209)
Loans charged-off | 0 | 0 | 0
Recoveries | 0 | 0 | 0
Net loans (charged-off) recovered | 0 | 0 | 0
Ending balance | 416 | 447 | 368
Consumer 1-4 Family Mortgage Loans [Member] |  |  |
Financing Receivable, Allowance for Credit Losses |  |  |
Beginning balance | 2,086 | 2,292 | 2,768
Provision for loan losses | 341 | (219) | (536)
Loans charged-off | (141) | (110) | (48)
Recoveries | 333 | 123 | 108
Net loans (charged-off) recovered | 192 | 13 | 60
Ending balance | 2,619 | 2,086 | 2,292
Other Consumer |  |  |
Financing Receivable, Allowance for Credit Losses |  |  |
Beginning balance | 345 | 283 | 379
Provision for loan losses | 959 | 275 | 150
Loans charged-off | (516) | (336) | (357)
Recoveries | 163 | 123 | 111
Net loans (charged-off) recovered | (353) | (213) | (246)
Ending balance | 951 | 345 | 283
Unallocated |  |  |
Financing Receivable, Allowance for Credit Losses |  |  |
Beginning balance | 2,320 | 3,294 | 2,666
Provision for loan losses | 819 | (974) | 628
Loans charged-off | 0 | 0 | 0
Recoveries | 0 | 0 | 0
Net loans (charged-off) recovered | 0 | 0 | 0
Ending balance | $ 3,139 | $ 2,320 | $ 3,294

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- Definition Reflects the amount of loans and leases that have been removed after recoveries, or charged off, from both loan receivables and the reserve for credit losses, typically because they are considered to be not salvageable or have been purchased by unconsolidated collection entities. + References No definition available. + Details
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- Definition Amount of recovery of loans and lease receivables which had previously been fully or partially written-off as bad debts. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (c)(4) -URI http://asc.fasb.org/extlink&oid=121611835&loc=SL6953423-111524 + Details
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- Definition Amount of loans and leases that have been written off from both loan receivables and allowance reserve for credit loss. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (c)(3) -URI http://asc.fasb.org/extlink&oid=121611835&loc=SL6953423-111524 + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Definition Amount of allowance to cover probable credit losses on loans and leases. Includes carryover of or adjustments to the allowance for loan losses in connection with business combinations. Excludes allowance for loans and leases covered under loss sharing agreements. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (g) -URI http://asc.fasb.org/extlink&oid=121611835&loc=SL6953423-111524 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (b)(1)(ii) -URI http://asc.fasb.org/extlink&oid=121614798&loc=d3e15032-111544 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=121611835&loc=SL6953423-111524 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section S99 -Paragraph 4 -Subparagraph (SAB Topic 6.L.1) -URI http://asc.fasb.org/extlink&oid=27010918&loc=d3e74567-122707 + Details
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