LOAN (Total Loans Outstanding) (Details) (USD $)	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total commercial loans	$ 1,929,359,000	$ 1,899,883,000
Total consumer loans	328,485,000	334,154,000
Subtotal	2,257,844,000	2,234,037,000
Less: Allowance for loan losses	(51,445,000)	(53,400,000)	(45,007,000)	(32,073,000)
Net deferred loan fees	(324,000)	(328,000)
Loans, net of allowance for loan losses of $51,445 and $53,400	2,206,075,000	2,180,309,000
Commercial and Industrial Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total commercial loans	846,822,000	751,156,000
Less: Allowance for loan losses	(22,342,000)	(22,830,000)	(21,479,000)
Commercial and Industrial Loans [Member] | Working Capital Lines Of Credit Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total commercial loans	439,638,000	373,768,000
Commercial and Industrial Loans [Member] | Non-working Capital Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total commercial loans	407,184,000	377,388,000
Commercial Real Estate and Multi-family Residential Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total commercial loans	801,011,000	852,520,000
Commercial Real Estate and Multi-family Residential Loans [Member] | Construction and Land Development Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total commercial loans	82,494,000	82,284,000
Commercial Real Estate and Multi-family Residential Loans [Member] | Owner Occupied Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total commercial loans	358,617,000	346,669,000
Commercial Real Estate and Multi-family Residential Loans [Member] | Nonowner Occupied Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total commercial loans	314,889,000	385,090,000
Commercial Real Estate and Multi-family Residential Loans [Member] | Multifamily Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total commercial loans	45,011,000	38,477,000
Agri-business and Agricultural Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total commercial loans	224,719,000	237,929,000
Less: Allowance for loan losses	(1,403,000)	(695,000)	(1,318,000)
Agri-business and Agricultural Loans [Member] | Loans Secured By Farmland [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total commercial loans	109,147,000	118,224,000
Agri-business and Agricultural Loans [Member] | Loans For Agricultural Production [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total commercial loans	115,572,000	119,705,000
Other Commerical Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total commercial loans	56,807,000	58,278,000
Total Consumer 1 To 4 Family Mortgage Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total consumer loans	282,730,000	288,155,000
Total Consumer 1 To 4 Family Mortgage Loans [Member] | Closed End First Mortgage Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total consumer loans	109,823,000	106,999,000
Total Consumer 1 To 4 Family Mortgage Loans [Member] | Open End And Junior Lien Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total consumer loans	161,366,000	175,694,000
Total Consumer 1 To 4 Family Mortgage Loans [Member] | Residential Construction and Land Development Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total consumer loans	11,541,000	5,462,000
Other Consumer [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total consumer loans	$ 45,755,000	$ 45,999,000