ALLOWANCE FOR LOAN LOSSES AND CREDIT QUALITY (Aging Of The Recorded Investment In Past Due Loans) (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Financing Receivable, Recorded Investment, Aging [Abstract]
Loans Not Past Due	$ 2,755,509	$ 2,746,240
30 to 89 Days Past Due	1,094	2,372
Greater than 90 Days Past Due	88	130
Nonaccrual	15,522	13,578
Total Past Due	16,704	16,080
Total	2,772,213	2,762,320
Other Commerical Loans [Member]
Financing Receivable, Recorded Investment, Aging [Abstract]
Loans Not Past Due	82,473	75,684
30 to 89 Days Past Due	0	0
Greater than 90 Days Past Due	0	0
Nonaccrual	0	30
Total Past Due	0	30
Total	82,473	75,714
Other consumer loans [Member]
Financing Receivable, Recorded Investment, Aging [Abstract]
Loans Not Past Due	48,532	49,308
30 to 89 Days Past Due	79	108
Greater than 90 Days Past Due	0	0
Nonaccrual	46	51
Total Past Due	125	159
Total	48,657	49,467
Commercial and Industrial Loans [Member]
Financing Receivable, Recorded Investment, Aging [Abstract]
Total	1,079,122	1,035,599
Commercial and Industrial Loans [Member] | Working Capital Lines Of Credit Loans [Member]
Financing Receivable, Recorded Investment, Aging [Abstract]
Loans Not Past Due	574,030	543,613
30 to 89 Days Past Due	0	0
Greater than 90 Days Past Due	0	0
Nonaccrual	207	632
Total Past Due	207	632
Total	574,237	544,245
Commercial and Industrial Loans [Member] | Non-working Capital Loans [Member]
Financing Receivable, Recorded Investment, Aging [Abstract]
Loans Not Past Due	501,726	487,655
30 to 89 Days Past Due	0	0
Greater than 90 Days Past Due	0	101
Nonaccrual	3,159	3,598
Total Past Due	3,159	3,699
Total	504,885	491,354
Commercial Real Estate and Multi-Family Residential Loans [Member]
Financing Receivable, Recorded Investment, Aging [Abstract]
Total	1,040,954	1,024,863
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	150,222	155,711
30 to 89 Days Past Due	0	0
Greater than 90 Days Past Due	0	0
Nonaccrual	526	526
Total Past Due	526	526
Total	150,748	156,237
Commercial Real Estate and Multi-Family Residential Loans [Member] | Owner Occupied Loans [Member]
Financing Receivable, Recorded Investment, Aging [Abstract]
Loans Not Past Due	390,724	399,028
30 to 89 Days Past Due	0	800
Greater than 90 Days Past Due	0	0
Nonaccrual	5,835	3,049
Total Past Due	5,835	3,849
Total	396,559	402,877
Commercial Real Estate and Multi-Family Residential Loans [Member] | Nonowner Occupied Loans [Member]
Financing Receivable, Recorded Investment, Aging [Abstract]
Loans Not Past Due	395,928	390,394
30 to 89 Days Past Due	0	31
Greater than 90 Days Past Due	0	0
Nonaccrual	3,521	3,629
Total Past Due	3,521	3,660
Total	399,449	394,054
Commercial Real Estate and Multi-Family Residential Loans [Member] | Multifamily Loans [Member]
Financing Receivable, Recorded Investment, Aging [Abstract]
Loans Not Past Due	94,198	71,695
30 to 89 Days Past Due	0	0
Greater than 90 Days Past Due	0	0
Nonaccrual	0	0
Total Past Due	0	0
Total	94,198	71,695
Agri-business and Agricultural Loans [Member]
Financing Receivable, Recorded Investment, Aging [Abstract]
Total	216,322	273,874
Agri-business and Agricultural Loans [Member] | Loans Secured By Farmland [Member]
Financing Receivable, Recorded Investment, Aging [Abstract]
Loans Not Past Due	119,453	136,923
30 to 89 Days Past Due	0	0
Greater than 90 Days Past Due	0	0
Nonaccrual	481	485
Total Past Due	481	485
Total	119,934	137,408
Agri-business and Agricultural Loans [Member] | Loans For Agricultural Production [Member]
Financing Receivable, Recorded Investment, Aging [Abstract]
Loans Not Past Due	96,388	136,466
30 to 89 Days Past Due	0	0
Greater than 90 Days Past Due	0	0
Nonaccrual	0	0
Total Past Due	0	0
Total	96,388	136,466
Consumer 1-4 Family Mortgage Loans [Member]
Financing Receivable, Recorded Investment, Aging [Abstract]
Total	304,685	302,803
Consumer 1-4 Family Mortgage Loans [Member] | Closed End First Mortgage Loans [Member]
Financing Receivable, Recorded Investment, Aging [Abstract]
Loans Not Past Due	142,558	142,615
30 to 89 Days Past Due	975	1,198
Greater than 90 Days Past Due	88	20
Nonaccrual	1,392	1,051
Total Past Due	2,455	2,269
Total	145,013	144,884
Consumer 1-4 Family Mortgage Loans [Member] | Open End and Junior Lien Loans [Member]
Financing Receivable, Recorded Investment, Aging [Abstract]
Loans Not Past Due	150,628	150,551
30 to 89 Days Past Due	40	235
Greater than 90 Days Past Due	0	9
Nonaccrual	355	398
Total Past Due	395	642
Total	151,023	151,193
Consumer 1-4 Family Mortgage Loans [Member] | Residential Construction Loans [Member]
Financing Receivable, Recorded Investment, Aging [Abstract]
Loans Not Past Due	8,649	6,597
30 to 89 Days Past Due	0	0
Greater than 90 Days Past Due	0	0
Nonaccrual	0	129
Total Past Due	0	129
Total	$ 8,649	$ 6,726