Estimated Fair Value of Financial Instruments (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011
Carrying Amount [Member]
Financial assets
Cash and due from banks, Federal funds sold and interest bearing deposits in other banks	$ 56,619	$ 40,647
Securities	228,788	226,012
Portfolio loans, net	850,159	826,025
Loans held for sale	1,207	3,448
Accrued interest receivable	3,604	3,550
Deposits:
Demand, savings and money market	527,463	486,690
Certificates of deposit	496,090	504,390
Total deposits	1,023,553	991,080
Short-term borrowings	827	227
Federal Home Loan Bank advances	47,495	42,497
Junior subordinated debentures	16,238	16,238
Accrued interest payable	1,007	1,118
Estimated Fair Value [Member]
Financial assets
Cash and due from banks, Federal funds sold and interest bearing deposits in other banks	56,619	40,647
Securities	228,788	226,012
Portfolio loans, net	848,393	825,662
Loans held for sale	1,207	3,448
Accrued interest receivable	3,604	3,550
Deposits:
Demand, savings and money market	527,463	486,690
Certificates of deposit	500,265	509,449
Total deposits	1,027,728	996,139
Short-term borrowings	827	227
Federal Home Loan Bank advances	48,671	43,824
Junior subordinated debentures	16,645	16,130
Accrued interest payable	$ 1,007	$ 1,118