Estimated Fair Value of Financial Instruments - Summary of Financial Instruments (Details) - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Fair Value Inputs Assets Liabilities Quantitative Information [Line Items]
Securities	$ 208,243	$ 217,572
Accrued interest payable	613	596
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	33,101	24,142
Securities	208,243	217,572
Restricted stock	5,741	5,741
Portfolio loans, net	917,909	912,609
Loans held for sale	4,050	10,483
Accrued interest receivable	3,512	3,635
Demand, savings and money market	608,890	594,747
Certificates of deposit	442,331	440,178
Short-term borrowings	635	10,611
Federal Home Loan Bank advances	47,027	54,321
Junior subordinated debentures	16,238	16,238
Accrued interest payable	613	596
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	33,101	24,142
Securities	208,243	217,572
Portfolio loans, net	922,922	913,844
Loans held for sale	4,227	11,164
Accrued interest receivable	3,512	3,635
Demand, savings and money market	590,517	579,825
Certificates of deposit	443,761	441,786
Short-term borrowings	635	10,611
Federal Home Loan Bank advances	47,488	54,847
Junior subordinated debentures	21,780	22,452
Accrued interest payable	613	596
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	33,101	24,142
Securities	0	0
Internal Models with Significant Observable Market Parameters (Level 2)
Fair Value Inputs Assets Liabilities Quantitative Information [Line Items]
Securities	208,243	217,572
Loans held for sale	4,227	11,164
Accrued interest receivable	804	921
Demand, savings and money market	590,517	579,825
Certificates of deposit	443,761	441,786
Short-term borrowings	635	10,611
Federal Home Loan Bank advances	47,488	54,847
Junior subordinated debentures	21,780	22,452
Accrued interest payable	0	0
Internal Models with Significant Unobservable Market Parameters (Level 3)
Fair Value Inputs Assets Liabilities Quantitative Information [Line Items]
Portfolio loans, net	922,922	913,844
Loans held for sale	0	0
Accrued interest receivable	2,708	2,714
Accrued interest payable	$ 613	$ 596