Estimated Fair Value of Financial Instruments - Summary of Financial Instruments (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013
Fair Value Inputs Assets Liabilities Quantitative Information [Line Items]
Securities	$ 219,422	$ 216,122
Accrued interest payable	688	789
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	47,795	52,272
Securities	219,422	216,122
Restricted stock	5,741	5,741
Portfolio loans, net	899,935	884,794
Loans held for sale	2,856	4,483
Accrued interest receivable	3,572	3,621
Demand, savings and money market	573,139	542,739
Certificates of deposit	475,799	502,850
Short-term borrowings	3,362	4,576
Federal Home Loan Bank advances	46,813	46,708
Junior subordinated debentures	16,238	16,238
Accrued interest payable	688	789
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	47,795	52,272
Securities	219,422	216,122
Portfolio loans, net	885,456	884,211
Loans held for sale	2,856	4,487
Accrued interest receivable	3,572	3,621
Demand, savings and money market	573,139	542,739
Certificates of deposit	477,357	504,381
Short-term borrowings	3,362	4,576
Federal Home Loan Bank advances	46,763	46,923
Junior subordinated debentures	16,650	16,778
Accrued interest payable	688	789
Quoted Market Prices in Active Markets (Level 1)
Fair Value Inputs Assets Liabilities Quantitative Information [Line Items]
Cash and due from banks, Federal funds sold and interest bearing deposits in other banks	47,795
Securities	0
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
Internal Models with Significant Observable Market Parameters (Level 2)
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	219,422
Portfolio loans, net
Loans held for sale	2,874
Accrued interest receivable	925
Demand, savings and money market	573,139
Certificates of deposit	477,357
Short-term borrowings	3,362
Federal Home Loan Bank advances	46,763
Junior subordinated debentures	16,650
Accrued interest payable	688
Internal Models with Significant Unobservable Market Parameters (Level 3)
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
Portfolio loans, net	885,456
Loans held for sale	0
Accrued interest receivable	2,647
Demand, savings and money market
Certificates of deposit
Short-term borrowings
Federal Home Loan Bank advances
Junior subordinated debentures
Accrued interest payable