Estimated Fair Value of Financial Instruments - Summary of Financial Instruments (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Fair Value Inputs Assets Liabilities Quantitative Information [Line Items]
Accrued interest payable	$ 804	$ 882
Carrying Value [Member]
Fair Value Inputs Assets Liabilities Quantitative Information [Line Items]
Cash and due from banks, Federal funds sold and interest bearing deposits in other banks	47,090	30,659
Securities	215,290	203,763
Restricted stock	5,741	5,741
Portfolio loans, net	873,509	864,911
Loans held for sale	2,110	7,634
Accrued interest receivable	3,750	3,726
Demand, savings and money market	531,429	517,181
Certificates of deposit	500,816	482,411
Short-term borrowings	1,643	1,115
Federal Home Loan Bank advances	46,658	46,508
Junior subordinated debentures	16,238	16,238
Accrued interest payable	804	882
Estimated Fair Value [Member]
Fair Value Inputs Assets Liabilities Quantitative Information [Line Items]
Cash and due from banks, Federal funds sold and interest bearing deposits in other banks	47,090	30,659
Securities	215,290	203,763
Restricted stock	5,741	5,741
Portfolio loans, net	870,304	868,716
Loans held for sale	2,123	7,891
Accrued interest receivable	3,750	3,726
Demand, savings and money market	526,228	511,665
Certificates of deposit	502,660	485,394
Short-term borrowings	1,643	1,115
Federal Home Loan Bank advances	46,851	46,828
Junior subordinated debentures	15,375	17,197
Accrued interest payable	804	882
Level 1 [Member]
Fair Value Inputs Assets Liabilities Quantitative Information [Line Items]
Cash and due from banks, Federal funds sold and interest bearing deposits in other banks	47,090
Securities	0	0
Restricted stock
Portfolio loans, net
Loans held for sale
Accrued interest receivable
Demand, savings and money market
Certificates of deposit
Short-term borrowings
Federal Home Loan Bank advances
Junior subordinated debentures
Accrued interest payable
Level 2 [Member]
Fair Value Inputs Assets Liabilities Quantitative Information [Line Items]
Cash and due from banks, Federal funds sold and interest bearing deposits in other banks
Securities	210,606	203,763
Restricted stock	5,741
Portfolio loans, net
Loans held for sale	2,123
Accrued interest receivable	3,750
Demand, savings and money market	526,228
Certificates of deposit	502,660
Short-term borrowings	1,643
Federal Home Loan Bank advances	46,851
Junior subordinated debentures	15,375
Accrued interest payable	804
Level 3 [Member]
Fair Value Inputs Assets Liabilities Quantitative Information [Line Items]
Cash and due from banks, Federal funds sold and interest bearing deposits in other banks
Securities	4,684	0
Restricted stock
Portfolio loans, net	870,304
Loans held for sale	0
Accrued interest receivable	0
Demand, savings and money market
Certificates of deposit
Short-term borrowings
Federal Home Loan Bank advances
Junior subordinated debentures
Accrued interest payable