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ALLOWANCE FOR LOAN LOSSES AND CREDIT QUALITY (Aging Of The Recorded Investment In Past Due Loans) (Details) - USD ($) $ in Thousands | Mar. 31, 2019 | Dec. 31, 2018
--- | --- | ---
Financing Receivable, Recorded Investment, Aging [Abstract] |  |
Loans Not Past Due | $ 3,922,736 | $ 3,897,455
30 to 89 Days Past Due | 9,697 | 10,025
Greater than 90 Days Past Due and Still Accruing | 481 | 0
Nonaccrual | 6,096 | 7,265
Total Past Due and Nonaccural | 16,274 | 17,290
Total | 3,939,010 | 3,914,745
Commercial and Industrial Loans [Member] |  |
Financing Receivable, Recorded Investment, Aging [Abstract] |  |
Total | 1,427,348 | 1,405,338
Commercial and Industrial Loans [Member] | Working Capital Lines Of Credit Loans [Member] |  |
Financing Receivable, Recorded Investment, Aging [Abstract] |  |
Loans Not Past Due | 720,597 | 684,191
30 to 89 Days Past Due | 4,308 | 4,328
Greater than 90 Days Past Due and Still Accruing | 0 | 0
Nonaccrual | 2,118 | 2,245
Total Past Due and Nonaccural | 6,426 | 6,573
Total | 727,023 | 690,764
Commercial and Industrial Loans [Member] | Non-working Capital Loans [Member] |  |
Financing Receivable, Recorded Investment, Aging [Abstract] |  |
Loans Not Past Due | 695,711 | 709,629
30 to 89 Days Past Due | 3,354 | 3,368
Greater than 90 Days Past Due and Still Accruing | 0 | 0
Nonaccrual | 1,260 | 1,577
Total Past Due and Nonaccural | 4,614 | 4,945
Total | 700,325 | 714,574
Commercial Real Estate and Multi-Family Residential Loans [Member] |  |
Financing Receivable, Recorded Investment, Aging [Abstract] |  |
Total | 1,627,035 | 1,567,165
Commercial Real Estate and Multi-Family Residential Loans [Member] | Construction and Land Development Loans [Member] |  |
Financing Receivable, Recorded Investment, Aging [Abstract] |  |
Loans Not Past Due | 292,627 | 265,544
30 to 89 Days Past Due | 0 | 0
Greater than 90 Days Past Due and Still Accruing | 0 | 0
Nonaccrual | 0 | 0
Total Past Due and Nonaccural | 0 | 0
Total | 292,627 | 265,544
Commercial Real Estate and Multi-Family Residential Loans [Member] | Owner Occupied Loans [Member] |  |
Financing Receivable, Recorded Investment, Aging [Abstract] |  |
Loans Not Past Due | 554,668 | 583,214
30 to 89 Days Past Due | 47 | 486
Greater than 90 Days Past Due and Still Accruing | 481 | 0
Nonaccrual | 1,749 | 2,269
Total Past Due and Nonaccural | 2,277 | 2,755
Total | 556,945 | 585,969
Commercial Real Estate and Multi-Family Residential Loans [Member] | Nonowner Occupied Loans [Member] |  |
Financing Receivable, Recorded Investment, Aging [Abstract] |  |
Loans Not Past Due | 536,900 | 520,431
30 to 89 Days Past Due | 142 | 57
Greater than 90 Days Past Due and Still Accruing | 0 | 0
Nonaccrual | 0 | 0
Total Past Due and Nonaccural | 142 | 57
Total | 537,042 | 520,488
Commercial Real Estate and Multi-Family Residential Loans [Member] | Multi-family Loans [Member] |  |
Financing Receivable, Recorded Investment, Aging [Abstract] |  |
Loans Not Past Due | 240,421 | 195,164
30 to 89 Days Past Due | 0 | 0
Greater than 90 Days Past Due and Still Accruing | 0 | 0
Nonaccrual | 0 | 0
Total Past Due and Nonaccural | 0 | 0
Total | 240,421 | 195,164
Agri-business and Agricultural Loans [Member] |  |
Financing Receivable, Recorded Investment, Aging [Abstract] |  |
Total | 302,406 | 370,607
Agri-business and Agricultural Loans [Member] | Loans Secured By Farmland [Member] |  |
Financing Receivable, Recorded Investment, Aging [Abstract] |  |
Loans Not Past Due | 139,230 | 177,080
30 to 89 Days Past Due | 147 | 150
Greater than 90 Days Past Due and Still Accruing | 0 | 0
Nonaccrual | 283 | 283
Total Past Due and Nonaccural | 430 | 433
Total | 139,660 | 177,513
Agri-business and Agricultural Loans [Member] | Loans For Agricultural Production [Member] |  |
Financing Receivable, Recorded Investment, Aging [Abstract] |  |
Loans Not Past Due | 162,746 | 193,094
30 to 89 Days Past Due | 0 | 0
Greater than 90 Days Past Due and Still Accruing | 0 | 0
Nonaccrual | 0 | 0
Total Past Due and Nonaccural | 0 | 0
Total | 162,746 | 193,094
Agri-business and Agricultural Loans [Member] | Other Commercial Loans [Member] |  |
Financing Receivable, Recorded Investment, Aging [Abstract] |  |
Loans Not Past Due | 111,875 | 95,520
30 to 89 Days Past Due | 0 | 0
Greater than 90 Days Past Due and Still Accruing | 0 | 0
Nonaccrual | 0 | 0
Total Past Due and Nonaccural | 0 | 0
Total | 111,875 | 95,520
Consumer 1-4 Family Mortgage Loans [Member] |  |
Financing Receivable, Recorded Investment, Aging [Abstract] |  |
Total | 385,935 | 390,293
Consumer 1-4 Family Mortgage Loans [Member] | Closed End First Mortgage Loans [Member] |  |
Financing Receivable, Recorded Investment, Aging [Abstract] |  |
Loans Not Past Due | 186,373 | 183,420
30 to 89 Days Past Due | 1,466 | 1,370
Greater than 90 Days Past Due and Still Accruing | 0 | 0
Nonaccrual | 588 | 671
Total Past Due and Nonaccural | 2,054 | 2,041
Total | 188,427 | 185,461
Consumer 1-4 Family Mortgage Loans [Member] | Open End and Junior Lien Loans [Member] |  |
Financing Receivable, Recorded Investment, Aging [Abstract] |  |
Loans Not Past Due | 184,217 | 188,320
30 to 89 Days Past Due | 87 | 98
Greater than 90 Days Past Due and Still Accruing | 0 | 0
Nonaccrual | 98 | 220
Total Past Due and Nonaccural | 185 | 318
Total | 184,402 | 188,638
Consumer 1-4 Family Mortgage Loans [Member] | Residential Construction Loans [Member] |  |
Financing Receivable, Recorded Investment, Aging [Abstract] |  |
Loans Not Past Due | 13,106 | 16,194
30 to 89 Days Past Due | 0 | 0
Greater than 90 Days Past Due and Still Accruing | 0 | 0
Nonaccrual | 0 | 0
Total Past Due and Nonaccural | 0 | 0
Total | 13,106 | 16,194
Consumer 1-4 Family Mortgage Loans [Member] | Other consumer loans [Member] |  |
Financing Receivable, Recorded Investment, Aging [Abstract] |  |
Loans Not Past Due | 84,265 | 85,654
30 to 89 Days Past Due | 146 | 168
Greater than 90 Days Past Due and Still Accruing | 0 | 0
Nonaccrual | 0 | 0
Total Past Due and Nonaccural | 146 | 168
Total | $ 84,411 | $ 85,822

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