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, 2013	Dec. 31, 2012	Mar. 31, 2012
Financing Receivable, Recorded Investment, Aging [Abstract]
30 to 89 Days Past Due	$ 2,857	$ 4,257
Greater than 90 Days Past Due	21,727	30,875
Total Past Due	24,584	35,132
Loans Not Past Due	2,237,876	2,222,388
Total ending loan balance	2,262,460	2,257,520
Other Commerical Loans [Member]
Financing Receivable, Recorded Investment, Aging [Abstract]
30 to 89 Days Past Due	0	0
Greater than 90 Days Past Due	0	0
Total Past Due	0	0
Loans Not Past Due	48,863	56,810
Total ending loan balance	48,863	56,810
Commercial and Industrial Loans [Member]
Financing Receivable, Recorded Investment, Aging [Abstract]
Total ending loan balance	842,467	847,009	780,828
Commercial and Industrial Loans [Member] | Working Capital Lines Of Credit Loans [Member]
Financing Receivable, Recorded Investment, Aging [Abstract]
30 to 89 Days Past Due	0	233
Greater than 90 Days Past Due	1,858	1,899
Total Past Due	1,858	2,132
Loans Not Past Due	435,657	437,705
Total ending loan balance	437,515	439,837
Commercial and Industrial Loans [Member] | Non-working Capital Loans [Member]
Financing Receivable, Recorded Investment, Aging [Abstract]
30 to 89 Days Past Due	7	48
Greater than 90 Days Past Due	3,692	4,862
Total Past Due	3,699	4,910
Loans Not Past Due	401,253	402,262
Total ending loan balance	404,952	407,172
Commercial Real Estate and Multi-Family Residential Loans [Member]
Financing Receivable, Recorded Investment, Aging [Abstract]
Total ending loan balance	847,018	800,198	834,692
Commercial Real Estate and Multi-Family Residential Loans [Member] | Construction and Land Development Loans [Member]
Financing Receivable, Recorded Investment, Aging [Abstract]
30 to 89 Days Past Due	0	998
Greater than 90 Days Past Due	390	398
Total Past Due	390	1,396
Loans Not Past Due	96,498	80,954
Total ending loan balance	96,888	82,350
Commercial Real Estate and Multi-Family Residential Loans [Member] | Owner Occupied Loans [Member]
Financing Receivable, Recorded Investment, Aging [Abstract]
30 to 89 Days Past Due	152	1,023
Greater than 90 Days Past Due	2,582	2,461
Total Past Due	2,734	3,484
Loans Not Past Due	362,661	354,921
Total ending loan balance	365,395	358,405
Commercial Real Estate and Multi-Family Residential Loans [Member] | Nonowner Occupied Loans [Member]
Financing Receivable, Recorded Investment, Aging [Abstract]
30 to 89 Days Past Due	507	38
Greater than 90 Days Past Due	11,568	19,200
Total Past Due	12,075	19,238
Loans Not Past Due	326,466	295,243
Total ending loan balance	338,541	314,481
Commercial Real Estate and Multi-Family Residential Loans [Member] | Multifamily Loans [Member]
Financing Receivable, Recorded Investment, Aging [Abstract]
30 to 89 Days Past Due	0	0
Greater than 90 Days Past Due	0	286
Total Past Due	0	286
Loans Not Past Due	46,194	44,676
Total ending loan balance	46,962	44,962
Agri-business and Agricultural Loans [Member]
Financing Receivable, Recorded Investment, Aging [Abstract]
Total ending loan balance	204,945	224,805	217,173
Agri-business and Agricultural Loans [Member] | Loans Secured By Farmland [Member]
Financing Receivable, Recorded Investment, Aging [Abstract]
30 to 89 Days Past Due	0	0
Greater than 90 Days Past Due	975	797
Total Past Due	975	797
Loans Not Past Due	98,574	108,359
Total ending loan balance	99,549	109,156
Agri-business and Agricultural Loans [Member] | Loans For Agricultural Production [Member]
Financing Receivable, Recorded Investment, Aging [Abstract]
30 to 89 Days Past Due	0	0
Greater than 90 Days Past Due	0	0
Total Past Due	0	0
Loans Not Past Due	105,396	115,649
Total ending loan balance	105,396	115,649
Consumer 1-4 Family Mortgage Loans [Member]
Financing Receivable, Recorded Investment, Aging [Abstract]
Total ending loan balance	277,321	282,994	289,133
Consumer 1-4 Family Mortgage Loans [Member] | Closed End First Mortgage Loans [Member]
Financing Receivable, Recorded Investment, Aging [Abstract]
30 to 89 Days Past Due	1,273	1,475
Greater than 90 Days Past Due	533	504
Total Past Due	1,806	1,979
Loans Not Past Due	114,087	107,583
Total ending loan balance	115,893	109,562
Consumer 1-4 Family Mortgage Loans [Member] | Open End and Junior Lien Loans [Member]
Financing Receivable, Recorded Investment, Aging [Abstract]
30 to 89 Days Past Due	206	361
Greater than 90 Days Past Due	64	391
Total Past Due	270	752
Loans Not Past Due	155,058	161,172
Total ending loan balance	155,328	161,924
Consumer 1-4 Family Mortgage Loans [Member] | Residential Construction Loans [Member]
Financing Receivable, Recorded Investment, Aging [Abstract]
30 to 89 Days Past Due	54	0
Greater than 90 Days Past Due	0	0
Total Past Due	54	0
Loans Not Past Due	6,046	11,508
Total ending loan balance	6,100	11,508
Other Consumer [Member]
Financing Receivable, Recorded Investment, Aging [Abstract]
30 to 89 Days Past Due	658	81
Greater than 90 Days Past Due	65	77
Total Past Due	723	158
Loans Not Past Due	41,123	45,546
Total ending loan balance	$ 41,846	$ 45,704	$ 44,941