ALLOWANCE FOR LOAN LOSSES AND CREDIT QUALITY (Aging Of The Recorded Investment In Past Due Loans) (Details) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Financing Receivable, Recorded Investment, Aging [Abstract]
Loans Not Past Due	$ 3,101,697	$ 3,065,105
30 to 89 Days Past Due	4,027	2,771
Nonaccrual	7,576	13,053
Total Past Due	11,603	15,824
Total	3,113,300	3,080,929
Greater than 90 Days Past Due [Member]
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	0	0
Other Commercial Loans [Member]
Financing Receivable, Recorded Investment, Aging [Abstract]
Loans Not Past Due	83,612	85,071
30 to 89 Days Past Due	0	0
Nonaccrual	0	0
Total Past Due	0	0
Total	83,612	85,071
Other Commercial Loans [Member] | Greater than 90 Days Past Due [Member]
Financing Receivable, Recorded Investment, Aging [Abstract]
Total Past Due	0	0
Other consumer loans [Member]
Financing Receivable, Recorded Investment, Aging [Abstract]
Loans Not Past Due	53,146	48,687
30 to 89 Days Past Due	84	328
Nonaccrual	0	0
Total Past Due	84	328
Total	53,230	49,015
Other consumer 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]
Financing Receivable, Recorded Investment, Aging [Abstract]
Total	1,205,899	1,179,693
Commercial and Industrial Loans [Member] | Working Capital Lines Of Credit Loans [Member]
Financing Receivable, Recorded Investment, Aging [Abstract]
Loans Not Past Due	589,464	579,081
30 to 89 Days Past Due	30	350
Nonaccrual	999	913
Total Past Due	1,029	1,263
Total	590,493	580,344
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	610,595	595,154
30 to 89 Days Past Due	2,898	0
Nonaccrual	1,913	4,195
Total Past Due	4,811	4,195
Total	615,406	599,349
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	1,165,488	1,128,973
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	206,025	230,336
30 to 89 Days Past Due	0	0
Nonaccrual	0	0
Total Past Due	0	0
Total	206,025	230,336
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	443,821	407,229
30 to 89 Days Past Due	0	310
Nonaccrual	3,453	4,172
Total Past Due	3,453	4,482
Total	447,274	411,711
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	407,681	404,146
30 to 89 Days Past Due	0	423
Nonaccrual	264	3,000
Total Past Due	264	3,423
Total	407,945	407,569
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	104,244	79,357
30 to 89 Days Past Due	0	0
Nonaccrual	0	0
Total Past Due	0	0
Total	104,244	79,357
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	273,223	306,178
Agri-business and Agricultural Loans [Member] | Loans Secured By Farmland [Member]
Financing Receivable, Recorded Investment, Aging [Abstract]
Loans Not Past Due	144,227	163,911
30 to 89 Days Past Due	0	0
Nonaccrual	471	471
Total Past Due	471	471
Total	144,698	164,382
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	128,525	141,706
30 to 89 Days Past Due	0	90
Nonaccrual	0	0
Total Past Due	0	90
Total	128,525	141,796
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
Consumer 1-4 Family Mortgage Loans [Member]
Financing Receivable, Recorded Investment, Aging [Abstract]
Total	331,848	331,999
Consumer 1-4 Family Mortgage Loans [Member] | Closed End First Mortgage Loans [Member]
Financing Receivable, Recorded Investment, Aging [Abstract]
Loans Not Past Due	160,268	156,525
30 to 89 Days Past Due	911	1,187
Nonaccrual	227	49
Total Past Due	1,138	1,236
Total	161,406	157,761
Consumer 1-4 Family Mortgage Loans [Member] | Closed End First Mortgage 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] | Open End and Junior Lien Loans [Member]
Financing Receivable, Recorded Investment, Aging [Abstract]
Loans Not Past Due	161,623	164,582
30 to 89 Days Past Due	104	83
Nonaccrual	249	253
Total Past Due	353	336
Total	161,976	164,918
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	8,466	9,320
30 to 89 Days Past Due	0	0
Nonaccrual	0	0
Total Past Due	0	0
Total	8,466	9,320
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