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ALLOWANCE FOR LOAN LOSSES AND CREDIT QUALITY - Credit Quality Indicators (Details) - USD ($) $ in Thousands | Sep. 30, 2020 | Dec. 31, 2019
--- | --- | ---
Financing Receivable, Recorded Investment |  |
Total ending loans balance | $ 4,589,924 | $ 4,065,828
Closed End First Mortgage Loans [Member] |  |
Financing Receivable, Recorded Investment |  |
Total ending loans balance |  | 176,873
Commercial and Industrial Loans [Member] |  |
Financing Receivable, Recorded Investment |  |
Total ending loans balance | 1,837,747 | 1,426,826
Commercial and Industrial Loans [Member] | Working Capital Lines of Credit Loans [Member] |  |
Financing Receivable, Recorded Investment |  |
Total ending loans balance | 592,640 | 709,983
Commercial and Industrial Loans [Member] | Non-working Capital Loans [Member] |  |
Financing Receivable, Recorded Investment |  |
Total ending loans balance | 1,245,107 | 716,843
Commercial Real Estate and Multi-family Residential Loans [Member] |  |
Financing Receivable, Recorded Investment |  |
Total ending loans balance | 1,857,820 | 1,670,840
Commercial Real Estate and Multi-family Residential Loans [Member] | Construction and Land Development Loans [Member] |  |
Financing Receivable, Recorded Investment |  |
Total ending loans balance | 392,078 | 286,534
Commercial Real Estate and Multi-family Residential Loans [Member] | Owner Occupied Loans [Member] |  |
Financing Receivable, Recorded Investment |  |
Total ending loans balance | 619,407 | 573,359
Commercial Real Estate and Multi-family Residential Loans [Member] | Nonowner Occupied Loans |  |
Financing Receivable, Recorded Investment |  |
Total ending loans balance | 567,027 | 570,687
Commercial Real Estate and Multi-family Residential Loans [Member] | Multifamily Loans |  |
Financing Receivable, Recorded Investment |  |
Total ending loans balance | 279,308 | 240,260
Agri-business and Agricultural Loans [Member] |  |
Financing Receivable, Recorded Investment |  |
Total ending loans balance | 338,164 | 379,631
Agri-business and Agricultural Loans [Member] | Loans Secured By Farmland |  |
Financing Receivable, Recorded Investment |  |
Total ending loans balance | 150,448 | 174,389
Agri-business and Agricultural Loans [Member] | Loans For Agricultural Production |  |
Financing Receivable, Recorded Investment |  |
Total ending loans balance | 187,716 | 205,242
Agri-business and Agricultural Loans [Member] | Other Commercial Loans |  |
Financing Receivable, Recorded Investment |  |
Total ending loans balance | 97,428 | 112,166
Consumer 1-4 Family Mortgage Loans [Member] |  |
Financing Receivable, Recorded Investment |  |
Total ending loans balance | 353,724 | 377,999
Consumer 1-4 Family Mortgage Loans [Member] | Closed End First Mortgage Loans [Member] |  |
Financing Receivable, Recorded Investment |  |
Total ending loans balance | 170,307 | 176,873
Consumer 1-4 Family Mortgage Loans [Member] | Open End And Junior Lien Loans [Member] |  |
Financing Receivable, Recorded Investment |  |
Total ending loans balance | 172,452 | 188,204
Consumer 1-4 Family Mortgage Loans [Member] | Residential Construction and Land Development Loans [Member] |  |
Financing Receivable, Recorded Investment |  |
Total ending loans balance | 10,965 | 12,922
Consumer 1-4 Family Mortgage Loans [Member] | Other Consumer Loans [Member] |  |
Financing Receivable, Recorded Investment |  |
Total ending loans balance | 105,041 | 98,366
Pass |  |
Financing Receivable, Recorded Investment |  |
Total ending loans balance | 3,995,113 | 3,490,863
Pass | Commercial and Industrial Loans [Member] | Working Capital Lines of Credit Loans [Member] |  |
Financing Receivable, Recorded Investment |  |
Total ending loans balance | 526,206 | 631,728
Pass | Commercial and Industrial Loans [Member] | Non-working Capital Loans [Member] |  |
Financing Receivable, Recorded Investment |  |
Total ending loans balance | 1,195,861 | 673,370
Pass | Commercial Real Estate and Multi-family Residential Loans [Member] | Construction and Land Development Loans [Member] |  |
Financing Receivable, Recorded Investment |  |
Total ending loans balance | 392,078 | 286,534
Pass | Commercial Real Estate and Multi-family Residential Loans [Member] | Owner Occupied Loans [Member] |  |
Financing Receivable, Recorded Investment |  |
Total ending loans balance | 579,800 | 535,496
Pass | Commercial Real Estate and Multi-family Residential Loans [Member] | Nonowner Occupied Loans |  |
Financing Receivable, Recorded Investment |  |
Total ending loans balance | 560,424 | 569,315
Pass | Commercial Real Estate and Multi-family Residential Loans [Member] | Multifamily Loans |  |
Financing Receivable, Recorded Investment |  |
Total ending loans balance | 279,308 | 240,260
Pass | Agri-business and Agricultural Loans [Member] | Loans Secured By Farmland |  |
Financing Receivable, Recorded Investment |  |
Total ending loans balance | 139,013 | 165,005
Pass | Agri-business and Agricultural Loans [Member] | Loans For Agricultural Production |  |
Financing Receivable, Recorded Investment |  |
Total ending loans balance | 136,682 | 191,489
Pass | Agri-business and Agricultural Loans [Member] | Other Commercial Loans |  |
Financing Receivable, Recorded Investment |  |
Total ending loans balance | 97,428 | 112,166
Pass | Consumer 1-4 Family Mortgage Loans [Member] | Closed End First Mortgage Loans [Member] |  |
Financing Receivable, Recorded Investment |  |
Total ending loans balance | 42,213 | 47,405
Pass | Consumer 1-4 Family Mortgage Loans [Member] | Open End And Junior Lien Loans [Member] |  |
Financing Receivable, Recorded Investment |  |
Total ending loans balance | 9,058 | 10,845
Pass | Consumer 1-4 Family Mortgage Loans [Member] | Residential Construction and Land Development Loans [Member] |  |
Financing Receivable, Recorded Investment |  |
Total ending loans balance | 0 | 0
Pass | Consumer 1-4 Family Mortgage Loans [Member] | Other Consumer Loans [Member] |  |
Financing Receivable, Recorded Investment |  |
Total ending loans balance | 37,042 | 27,250
Special Mention |  |
Financing Receivable, Recorded Investment |  |
Total ending loans balance | 168,670 | 96,608
Special Mention | Commercial and Industrial Loans [Member] | Working Capital Lines of Credit Loans [Member] |  |
Financing Receivable, Recorded Investment |  |
Total ending loans balance | 47,016 | 40,551
Special Mention | Commercial and Industrial Loans [Member] | Non-working Capital Loans [Member] |  |
Financing Receivable, Recorded Investment |  |
Total ending loans balance | 25,294 | 18,782
Special Mention | Commercial Real Estate and Multi-family Residential Loans [Member] | Construction and Land Development Loans [Member] |  |
Financing Receivable, Recorded Investment |  |
Total ending loans balance | 0 | 0
Special Mention | Commercial Real Estate and Multi-family Residential Loans [Member] | Owner Occupied Loans [Member] |  |
Financing Receivable, Recorded Investment |  |
Total ending loans balance | 27,945 | 14,804
Special Mention | Commercial Real Estate and Multi-family Residential Loans [Member] | Nonowner Occupied Loans |  |
Financing Receivable, Recorded Investment |  |
Total ending loans balance | 6,603 | 781
Special Mention | Commercial Real Estate and Multi-family Residential Loans [Member] | Multifamily Loans |  |
Financing Receivable, Recorded Investment |  |
Total ending loans balance | 0 | 0
Special Mention | Agri-business and Agricultural Loans [Member] | Loans Secured By Farmland |  |
Financing Receivable, Recorded Investment |  |
Total ending loans balance | 10,778 | 7,952
Special Mention | Agri-business and Agricultural Loans [Member] | Loans For Agricultural Production |  |
Financing Receivable, Recorded Investment |  |
Total ending loans balance | 51,034 | 13,738
Special Mention | Agri-business and Agricultural Loans [Member] | Other Commercial Loans |  |
Financing Receivable, Recorded Investment |  |
Total ending loans balance | 0 | 0
Special Mention | Consumer 1-4 Family Mortgage Loans [Member] | Closed End First Mortgage Loans [Member] |  |
Financing Receivable, Recorded Investment |  |
Total ending loans balance | 0 | 0
Special Mention | Consumer 1-4 Family Mortgage Loans [Member] | Open End And Junior Lien Loans [Member] |  |
Financing Receivable, Recorded Investment |  |
Total ending loans balance | 0 | 0
Special Mention | Consumer 1-4 Family Mortgage Loans [Member] | Residential Construction and Land Development Loans [Member] |  |
Financing Receivable, Recorded Investment |  |
Total ending loans balance | 0 | 0
Special Mention | Consumer 1-4 Family Mortgage Loans [Member] | Other Consumer Loans [Member] |  |
Financing Receivable, Recorded Investment |  |
Total ending loans balance | 0 | 0
Substandard |  |
Financing Receivable, Recorded Investment |  |
Total ending loans balance | 52,662 | 84,562
Substandard | Commercial and Industrial Loans [Member] | Working Capital Lines of Credit Loans [Member] |  |
Financing Receivable, Recorded Investment |  |
Total ending loans balance | 19,159 | 37,278
Substandard | Commercial and Industrial Loans [Member] | Non-working Capital Loans [Member] |  |
Financing Receivable, Recorded Investment |  |
Total ending loans balance | 18,747 | 19,381
Substandard | Commercial Real Estate and Multi-family Residential Loans [Member] | Construction and Land Development Loans [Member] |  |
Financing Receivable, Recorded Investment |  |
Total ending loans balance | 0 | 0
Substandard | Commercial Real Estate and Multi-family Residential Loans [Member] | Owner Occupied Loans [Member] |  |
Financing Receivable, Recorded Investment |  |
Total ending loans balance | 11,662 | 23,059
Substandard | Commercial Real Estate and Multi-family Residential Loans [Member] | Nonowner Occupied Loans |  |
Financing Receivable, Recorded Investment |  |
Total ending loans balance | 0 | 591
Substandard | Commercial Real Estate and Multi-family Residential Loans [Member] | Multifamily Loans |  |
Financing Receivable, Recorded Investment |  |
Total ending loans balance | 0 | 0
Substandard | Agri-business and Agricultural Loans [Member] | Loans Secured By Farmland |  |
Financing Receivable, Recorded Investment |  |
Total ending loans balance | 657 | 1,432
Substandard | Agri-business and Agricultural Loans [Member] | Loans For Agricultural Production |  |
Financing Receivable, Recorded Investment |  |
Total ending loans balance | 0 | 15
Substandard | Agri-business and Agricultural Loans [Member] | Other Commercial Loans |  |
Financing Receivable, Recorded Investment |  |
Total ending loans balance | 0 | 0
Substandard | Consumer 1-4 Family Mortgage Loans [Member] | Closed End First Mortgage Loans [Member] |  |
Financing Receivable, Recorded Investment |  |
Total ending loans balance | 1,728 | 1,976
Substandard | Consumer 1-4 Family Mortgage Loans [Member] | Open End And Junior Lien Loans [Member] |  |
Financing Receivable, Recorded Investment |  |
Total ending loans balance | 684 | 762
Substandard | Consumer 1-4 Family Mortgage Loans [Member] | Residential Construction and Land Development Loans [Member] |  |
Financing Receivable, Recorded Investment |  |
Total ending loans balance | 25 | 51
Substandard | Consumer 1-4 Family Mortgage Loans [Member] | Other Consumer Loans [Member] |  |
Financing Receivable, Recorded Investment |  |
Total ending loans balance | 0 | 17
Doubtful |  |
Financing Receivable, Recorded Investment |  |
Total ending loans balance | 0 | 0
Doubtful | Commercial and Industrial Loans [Member] | Working Capital Lines of Credit Loans [Member] |  |
Financing Receivable, Recorded Investment |  |
Total ending loans balance | 0 | 0
Doubtful | Commercial and Industrial Loans [Member] | Non-working Capital Loans [Member] |  |
Financing Receivable, Recorded Investment |  |
Total ending loans balance | 0 | 0
Doubtful | Commercial Real Estate and Multi-family Residential Loans [Member] | Construction and Land Development Loans [Member] |  |
Financing Receivable, Recorded Investment |  |
Total ending loans balance | 0 | 0
Doubtful | Commercial Real Estate and Multi-family Residential Loans [Member] | Owner Occupied Loans [Member] |  |
Financing Receivable, Recorded Investment |  |
Total ending loans balance | 0 | 0
Doubtful | Commercial Real Estate and Multi-family Residential Loans [Member] | Nonowner Occupied Loans |  |
Financing Receivable, Recorded Investment |  |
Total ending loans balance | 0 | 0
Doubtful | Commercial Real Estate and Multi-family Residential Loans [Member] | Multifamily Loans |  |
Financing Receivable, Recorded Investment |  |
Total ending loans balance | 0 | 0
Doubtful | Agri-business and Agricultural Loans [Member] | Loans Secured By Farmland |  |
Financing Receivable, Recorded Investment |  |
Total ending loans balance | 0 | 0
Doubtful | Agri-business and Agricultural Loans [Member] | Loans For Agricultural Production |  |
Financing Receivable, Recorded Investment |  |
Total ending loans balance | 0 | 0
Doubtful | Agri-business and Agricultural Loans [Member] | Other Commercial Loans |  |
Financing Receivable, Recorded Investment |  |
Total ending loans balance | 0 | 0
Doubtful | Consumer 1-4 Family Mortgage Loans [Member] | Closed End First Mortgage Loans [Member] |  |
Financing Receivable, Recorded Investment |  |
Total ending loans balance | 0 | 0
Doubtful | Consumer 1-4 Family Mortgage Loans [Member] | Open End And Junior Lien Loans [Member] |  |
Financing Receivable, Recorded Investment |  |
Total ending loans balance | 0 | 0
Doubtful | Consumer 1-4 Family Mortgage Loans [Member] | Residential Construction and Land Development Loans [Member] |  |
Financing Receivable, Recorded Investment |  |
Total ending loans balance | 0 | 0
Doubtful | Consumer 1-4 Family Mortgage Loans [Member] | Other Consumer Loans [Member] |  |
Financing Receivable, Recorded Investment |  |
Total ending loans balance | 0 | 0
Not Rated |  |
Financing Receivable, Recorded Investment |  |
Total ending loans balance | 373,479 | 393,795
Not Rated | Commercial and Industrial Loans [Member] | Working Capital Lines of Credit Loans [Member] |  |
Financing Receivable, Recorded Investment |  |
Total ending loans balance | 259 | 426
Not Rated | Commercial and Industrial Loans [Member] | Non-working Capital Loans [Member] |  |
Financing Receivable, Recorded Investment |  |
Total ending loans balance | 5,205 | 5,310
Not Rated | Commercial Real Estate and Multi-family Residential Loans [Member] | Construction and Land Development Loans [Member] |  |
Financing Receivable, Recorded Investment |  |
Total ending loans balance | 0 | 0
Not Rated | Commercial Real Estate and Multi-family Residential Loans [Member] | Owner Occupied Loans [Member] |  |
Financing Receivable, Recorded Investment |  |
Total ending loans balance | 0 | 0
Not Rated | Commercial Real Estate and Multi-family Residential Loans [Member] | Nonowner Occupied Loans |  |
Financing Receivable, Recorded Investment |  |
Total ending loans balance | 0 | 0
Not Rated | Commercial Real Estate and Multi-family Residential Loans [Member] | Multifamily Loans |  |
Financing Receivable, Recorded Investment |  |
Total ending loans balance | 0 | 0
Not Rated | Agri-business and Agricultural Loans [Member] | Loans Secured By Farmland |  |
Financing Receivable, Recorded Investment |  |
Total ending loans balance | 0 | 0
Not Rated | Agri-business and Agricultural Loans [Member] | Loans For Agricultural Production |  |
Financing Receivable, Recorded Investment |  |
Total ending loans balance | 0 | 0
Not Rated | Agri-business and Agricultural Loans [Member] | Other Commercial Loans |  |
Financing Receivable, Recorded Investment |  |
Total ending loans balance | 0 | 0
Not Rated | Consumer 1-4 Family Mortgage Loans [Member] | Closed End First Mortgage Loans [Member] |  |
Financing Receivable, Recorded Investment |  |
Total ending loans balance | 126,366 | 127,492
Not Rated | Consumer 1-4 Family Mortgage Loans [Member] | Open End And Junior Lien Loans [Member] |  |
Financing Receivable, Recorded Investment |  |
Total ending loans balance | 162,710 | 176,597
Not Rated | Consumer 1-4 Family Mortgage Loans [Member] | Residential Construction and Land Development Loans [Member] |  |
Financing Receivable, Recorded Investment |  |
Total ending loans balance | 10,940 | 12,871
Not Rated | Consumer 1-4 Family Mortgage Loans [Member] | Other Consumer Loans [Member] |  |
Financing Receivable, Recorded Investment |  |
Total ending loans balance | $ 67,999 | $ 71,099

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