Loans, Major Classifications of Loans, Net of Income and Deferred Loan Origination Cost (Details) (USD $)	Mar. 31, 2013	Dec. 31, 2012
Major classification of loans, net of unearned income and deferred loan origination costs [Line Items]
Loans, net of unearned income and deferred origination costs	$ 2,563,314,000	$ 2,550,573,000
Loans held for sale [Abstract]
Loans held-for-sale, Amount	1,400,000	22,500,000
Capitalized fees and cost related to origination of loans	200,000	400,000
Commercial Construction [Member]
Major classification of loans, net of unearned income and deferred loan origination costs [Line Items]
Loans, net of unearned income and deferred origination costs	102,303,000	119,447,000
Commercial Secured by Real Estate [Member]
Major classification of loans, net of unearned income and deferred loan origination costs [Line Items]
Loans, net of unearned income and deferred origination costs	847,807,000	807,213,000
Equipment Lease Financing [Member]
Major classification of loans, net of unearned income and deferred loan origination costs [Line Items]
Loans, net of unearned income and deferred origination costs	9,944,000	9,246,000
Commercial Other [Member]
Major classification of loans, net of unearned income and deferred loan origination costs [Line Items]
Loans, net of unearned income and deferred origination costs	375,409,000	376,348,000
Real Estate Construction [Member]
Major classification of loans, net of unearned income and deferred loan origination costs [Line Items]
Loans, net of unearned income and deferred origination costs	51,978,000	55,041,000
Real Estate Mortgage [Member]
Major classification of loans, net of unearned income and deferred loan origination costs [Line Items]
Loans, net of unearned income and deferred origination costs	696,321,000	696,928,000
Home Equity [Member]
Major classification of loans, net of unearned income and deferred loan origination costs [Line Items]
Loans, net of unearned income and deferred origination costs	79,899,000	82,292,000
Consumer Direct [Member]
Major classification of loans, net of unearned income and deferred loan origination costs [Line Items]
Loans, net of unearned income and deferred origination costs	119,191,000	122,581,000
Consumer Indirect [Member]
Major classification of loans, net of unearned income and deferred loan origination costs [Line Items]
Loans, net of unearned income and deferred origination costs	$ 280,462,000	$ 281,477,000