Fair Value Measurement (Details 2) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011
Financial Assets:
Cash and due from financial institutions		$ 52,127
Securities available for sale	211,224	204,633
Other securities		15,388
Loans, available for sale		598
Loans, net of allowance for loan losses		785,900
Bank owned life insurance		17,963
Accrued interest receivable		3,787
Financial Liabilities:
Deposits		911,945
Federal Home Loan Bank advances		52,263
Securities sold under agreement to repurchase		19,029
Subordinated debentures		26,461
Accrued interest payable		258
Carrying Amount [Member]
Financial Assets:
Cash and due from financial institutions	54,189	52,127
Securities available for sale	202,371
Other securities	15,524	15,388
Loans, available for sale	899	598
Loans, net of allowance for loan losses	752,078	764,011
Bank owned life insurance	18,288	17,963
Accrued interest receivable	3,712	3,787
Financial Liabilities:
Deposits		901,246
Nonmaturing deposits	627,755
Time deposits	269,499
Federal Home Loan Bank advances	50,278	50,295
Securities sold under agreement to repurchase	16,110	19,029
Subordinated debentures	29,427	29,427
Accrued interest payable	215	258
Total Fair Value [Member]
Financial Assets:
Cash and due from financial institutions	54,189
Securities available for sale	211,224
Other securities	15,524
Loans, available for sale	899
Loans, net of allowance for loan losses	772,092
Bank owned life insurance	18,288
Accrued interest receivable	3,712
Financial Liabilities:
Nonmaturing deposits	627,757
Time deposits	272,021
Federal Home Loan Bank advances	53,679
Securities sold under agreement to repurchase	16,110
Subordinated debentures	26,917
Accrued interest payable	215
Total Fair Value [Member] | Quoted Prices in Active Markets for Identical Assets Level 1 [Member]
Financial Assets:
Cash and due from financial institutions	54,189
Other securities	15,524
Loans, available for sale	899
Bank owned life insurance	18,288
Accrued interest receivable	3,712
Financial Liabilities:
Nonmaturing deposits	627,757
Securities sold under agreement to repurchase	16,110
Accrued interest payable	215
Total Fair Value [Member] | Significant Other Observable Inputs Level 2 [Member]
Financial Assets:
Securities available for sale	210,739
Total Fair Value [Member] | Significant Other Unobservable Inputs Level 3 [Member]
Financial Assets:
Securities available for sale	485
Loans, net of allowance for loan losses	772,092
Financial Liabilities:
Time deposits	272,021
Federal Home Loan Bank advances	53,679
Subordinated debentures	$ 26,917