Investment Securities (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014 Security	Dec. 31, 2013	Dec. 31, 2012
Investment securities available-for-sale [Abstract]
Amortized cost	$ 150,055	$ 174,333
Unrealized gains	1,777	1,181
Unrealized losses	(606)	(2,245)
Estimated fair value	151,226	173,269
Gross realized gains from available-for-sale securities	293	4	20
Gross realized losses from available-for-sale securities	245	0	12
Gross realized losses from other equity securities	50	0	0
Available-for-sale Securities, Debt Maturities, Amortized Cost Basis, by Contractual Maturity [Abstract]
Due in one year or less, Amortized cost	1,164
Due after one year through five years, Amortized cost	126,172
Due after five years through ten years, Amortized cost	20,783
Due after ten years, Amortized cost	1,936
Amortized cost	150,055	174,333
Available-for-sale Securities, Debt Maturities, Fair Value, by Contractual Maturity [Abstract]
Due in one year or less, Estimated fair value	1,168
Due after one year through five years, Estimated fair value	126,918
Due after five years through ten years, Estimated fair value	21,070
Due after ten years, Estimated fair value	2,070
Estimated fair value	151,226	173,269
Mortgage backed securities and collateralized mortgage obligations with expected maturities due after one year through five years	95,715
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract]
Less than 12 months, Fair Value	16,068	77,680
Less than 12 months, Unrealized losses	(112)	(2,076)
12 months or more, Fair Value	32,387	6,932
12 Months or more, Unrealized losses	(494)	(169)
Total Fair Value	48,455	84,612
Total Unrealized losses	(606)	(2,245)
Investment securities in an unrealized loss position less than 12 months	14
Investment securities in an unrealized loss position more than 12 months	25
Investment securities pledged as collateral	27,868	28,773
Securities of U.S. Government Agencies and Corporations [Member]
Investment securities available-for-sale [Abstract]
Amortized cost	28,787	53,960
Unrealized gains	17	8
Unrealized losses	(375)	(1,283)
Estimated fair value	28,429	52,685
Available-for-sale Securities, Debt Maturities, Amortized Cost Basis, by Contractual Maturity [Abstract]
Amortized cost	28,787	53,960
Available-for-sale Securities, Debt Maturities, Fair Value, by Contractual Maturity [Abstract]
Estimated fair value	28,429	52,685
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract]
Less than 12 months, Fair Value	1,474
Less than 12 months, Unrealized losses	(4)
12 months or more, Fair Value	21,729
12 Months or more, Unrealized losses	(371)
Total Fair Value	23,203
Total Unrealized losses	(375)
Obligations of States and Political Subdivisions [Member]
Investment securities available-for-sale [Abstract]
Amortized cost	20,236	27,528
Unrealized gains	579	409
Unrealized losses	(52)	(550)
Estimated fair value	20,763	27,387
Available-for-sale Securities, Debt Maturities, Amortized Cost Basis, by Contractual Maturity [Abstract]
Amortized cost	20,236	27,528
Available-for-sale Securities, Debt Maturities, Fair Value, by Contractual Maturity [Abstract]
Estimated fair value	20,763	27,387
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract]
Less than 12 months, Fair Value	1,927	46,654
Less than 12 months, Unrealized losses	(28)	(1,283)
12 months or more, Fair Value	1,530	0
12 Months or more, Unrealized losses	(24)	0
Total Fair Value	3,457	46,654
Total Unrealized losses	(52)	(1,283)
Collateralized Mortgage Obligations [Member]
Investment securities available-for-sale [Abstract]
Amortized cost	12,541	5,359
Unrealized gains	37	46
Unrealized losses	(25)	0
Estimated fair value	12,553	5,405
Available-for-sale Securities, Debt Maturities, Amortized Cost Basis, by Contractual Maturity [Abstract]
Amortized cost	12,541	5,359
Available-for-sale Securities, Debt Maturities, Fair Value, by Contractual Maturity [Abstract]
Estimated fair value	12,553	5,405
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract]
Less than 12 months, Fair Value	2,881	11,871
Less than 12 months, Unrealized losses	(25)	(550)
12 months or more, Fair Value	0	0
12 Months or more, Unrealized losses	0	0
Total Fair Value	2,881	11,871
Total Unrealized losses	(25)	(550)
Mortgage-backed Securities [Member]
Investment securities available-for-sale [Abstract]
Amortized cost	88,491	87,486
Unrealized gains	1,144	718
Unrealized losses	(154)	(412)
Estimated fair value	89,481	87,792
Available-for-sale Securities, Debt Maturities, Amortized Cost Basis, by Contractual Maturity [Abstract]
Amortized cost	88,491	87,486
Available-for-sale Securities, Debt Maturities, Fair Value, by Contractual Maturity [Abstract]
Estimated fair value	89,481	87,792
Available-for-sale Securities, Continuous Unrealized Loss Position [Abstract]
Less than 12 months, Fair Value	9,786	19,155
Less than 12 months, Unrealized losses	(55)	(243)
12 months or more, Fair Value	9,128	6,932
12 Months or more, Unrealized losses	(99)	(169)
Total Fair Value	18,914	26,087
Total Unrealized losses	$ (154)	$ (412)