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ALLOWANCE FOR LOAN LOSSES AND CREDIT QUALITY (Aging Of The Recorded Investment In Past Due Loans) (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Financing Receivable, Recorded Investment, Aging [Abstract]
Loans Not Past Due	$ 3,897,455	$ 3,799,432
30 to 89 Days Past Due	10,025	9,619
Nonaccrual	7,265	9,402
Total Past Due	0	6
Total Past Due and Nonaccural	17,290	19,027
Total	3,914,745	3,818,459
Commercial and Industrial Loans [Member]
Financing Receivable, Recorded Investment, Aging [Abstract]
Total	1,405,338	1,418,627
Commercial and Industrial Loans [Member] | Working Capital Lines Of Credit Loans [Member]
Financing Receivable, Recorded Investment, Aging [Abstract]
Loans Not Past Due	684,191	742,205
30 to 89 Days Past Due	4,328	11
Nonaccrual	2,245	1,459
Total Past Due and Nonaccural	6,573	1,470
Total	690,764	743,675
Commercial and Industrial Loans [Member] | Working Capital Lines Of Credit Loans [Member] | Greater than 90 Days Past Due [Member]
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	0	0
Commercial and Industrial Loans [Member] | Non-working Capital Loans [Member]
Financing Receivable, Recorded Investment, Aging [Abstract]
Loans Not Past Due	709,629	671,490
30 to 89 Days Past Due	3,368	0
Nonaccrual	1,577	3,462
Total Past Due and Nonaccural	4,945	3,462
Total	714,574	674,952
Commercial and Industrial Loans [Member] | Non-working Capital Loans [Member] | Greater than 90 Days Past Due [Member]
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	0	0
Commercial Real Estate and Multi-Family Residential Loans [Member]
Financing Receivable, Recorded Investment, Aging [Abstract]
Total	1,567,165	1,443,021
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	265,544	215,713
30 to 89 Days Past Due	0	8,000
Nonaccrual	0	0
Total Past Due and Nonaccural	0	8,000
Total	265,544	223,713
Commercial Real Estate and Multi-Family Residential Loans [Member] | Construction and Land Development Loans [Member] | Greater than 90 Days Past Due [Member]
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	0	0
Commercial Real Estate and Multi-Family Residential Loans [Member] | Owner Occupied Loans [Member]
Financing Receivable, Recorded Investment, Aging [Abstract]
Loans Not Past Due	583,214	534,648
30 to 89 Days Past Due	486	0
Nonaccrual	2,269	3,620
Total Past Due and Nonaccural	2,755	3,620
Total	585,969	538,268
Commercial Real Estate and Multi-Family Residential Loans [Member] | Owner Occupied Loans [Member] | Greater than 90 Days Past Due [Member]
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	0	0
Commercial Real Estate and Multi-Family Residential Loans [Member] | Nonowner Occupied Loans [Member]
Financing Receivable, Recorded Investment, Aging [Abstract]
Loans Not Past Due	520,431	507,696
30 to 89 Days Past Due	57	0
Nonaccrual	0	0
Total Past Due and Nonaccural	57	0
Total	520,488	507,696
Commercial Real Estate and Multi-Family Residential Loans [Member] | Nonowner Occupied Loans [Member] | Greater than 90 Days Past Due [Member]
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	0	0
Commercial Real Estate and Multi-Family Residential Loans [Member] | Multifamily Loans [Member]
Financing Receivable, Recorded Investment, Aging [Abstract]
Loans Not Past Due	195,164	173,100
30 to 89 Days Past Due	0	244
Nonaccrual	0	0
Total Past Due and Nonaccural	0	244
Total	195,164	173,344
Commercial Real Estate and Multi-Family Residential Loans [Member] | Multifamily Loans [Member] | Greater than 90 Days Past Due [Member]
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	0	0
Agri-business and Agricultural Loans [Member]
Financing Receivable, Recorded Investment, Aging [Abstract]
Total	370,607	382,926
Agri-business and Agricultural Loans [Member] | Loans Secured By Farmland [Member]
Financing Receivable, Recorded Investment, Aging [Abstract]
Loans Not Past Due	177,080	186,160
30 to 89 Days Past Due	150	0
Nonaccrual	283	283
Total Past Due and Nonaccural	433	283
Total	177,513	186,443
Agri-business and Agricultural Loans [Member] | Loans Secured By Farmland [Member] | Greater than 90 Days Past Due [Member]
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	0	0
Agri-business and Agricultural Loans [Member] | Loans For Agricultural Production [Member]
Financing Receivable, Recorded Investment, Aging [Abstract]
Loans Not Past Due	193,094	196,483
30 to 89 Days Past Due	0	0
Nonaccrual	0	0
Total Past Due and Nonaccural	0	0
Total	193,094	196,483
Agri-business and Agricultural Loans [Member] | Loans For Agricultural Production [Member] | Greater than 90 Days Past Due [Member]
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	0	0
Agri-business and Agricultural Loans [Member] | Other Commercial Loans [Member]
Financing Receivable, Recorded Investment, Aging [Abstract]
Loans Not Past Due	95,520	123,922
30 to 89 Days Past Due	0	0
Nonaccrual	0	0
Total Past Due and Nonaccural	0	0
Total	95,520	123,922
Agri-business and Agricultural Loans [Member] | Other Commercial Loans [Member] | Greater than 90 Days Past Due [Member]
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	0	0
Consumer 1-4 Family Mortgage Loans [Member]
Financing Receivable, Recorded Investment, Aging [Abstract]
Total	390,293	375,769
Consumer 1-4 Family Mortgage Loans [Member] | Closed End First Mortgage Loans [Member]
Financing Receivable, Recorded Investment, Aging [Abstract]
Loans Not Past Due	183,420	177,410
30 to 89 Days Past Due	1,370	1,183
Nonaccrual	671	342
Total Past Due	0	6
Total Past Due and Nonaccural	2,041	1,531
Total	185,461	178,941
Consumer 1-4 Family Mortgage Loans [Member] | Open End and Junior Lien Loans [Member]
Financing Receivable, Recorded Investment, Aging [Abstract]
Loans Not Past Due	188,320	183,056
30 to 89 Days Past Due	98	89
Nonaccrual	220	236
Total Past Due and Nonaccural	318	325
Total	188,638	183,381
Consumer 1-4 Family Mortgage Loans [Member] | Open End and Junior Lien Loans [Member] | Greater than 90 Days Past Due [Member]
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	0	0
Consumer 1-4 Family Mortgage Loans [Member] | Residential Construction Loans [Member]
Financing Receivable, Recorded Investment, Aging [Abstract]
Loans Not Past Due	16,194	13,447
30 to 89 Days Past Due	0	0
Nonaccrual	0	0
Total Past Due and Nonaccural	0	0
Total	16,194	13,447
Consumer 1-4 Family Mortgage Loans [Member] | Residential Construction Loans [Member] | Greater than 90 Days Past Due [Member]
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	0	0
Consumer 1-4 Family Mortgage Loans [Member] | Other consumer loans [Member]
Financing Receivable, Recorded Investment, Aging [Abstract]
Loans Not Past Due	85,654	74,102
30 to 89 Days Past Due	168	92
Nonaccrual	0	0
Total Past Due and Nonaccural	168	92
Total	85,822	74,194
Consumer 1-4 Family Mortgage Loans [Member] | Other consumer loans [Member] | Greater than 90 Days Past Due [Member]
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	$ 0	$ 0

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Recorded Investment in financing receivables that are past due and nonaccrual at the balance sheet date.

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Financing receivables that are current.

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