Investments (Details) (USD $)	3 Months Ended
	Mar. 31, 2013 Security	Mar. 31, 2012	Dec. 31, 2012
Available for Sale Securities Amortized Cost, Gross Unrealized Gains or Losses and Fair Value [Abstract]
Amortized Cost	$ 291,514,000		$ 300,018,000
Gross Unrealized Gains	9,271,000		10,578,000
Gross Unrealized Losses	(609,000)		(344,000)
Fair Value	300,176,000		310,252,000
Number of securities owned with fair value than cost	27
Available-For-Sale Securities, Fair Value and Gross Unrealized Losses [Abstract]
Less than Twelve Months, Fair Value	35,430,000		33,620,000
Twelve Months or Greater, Fair Value	2,053,000		0
Total, Fair Value	37,483,000		33,620,000
Less than Twelve Months, Gross Unrealized Losses	(550,000)		(344,000)
Twelve Months or Greater, Gross Unrealized Losses	(59,000)		0
Total, Gross Unrealized Losses	(609,000)		(344,000)
Duration securities impaired, Minimum	1 year
Proceeds from sale of securities available-for-sale	3,856,000	11,236,000
Realized investment gains (losses) [Abstract]
Gross gains	196,000	108,000
Gross losses	0	0
Net gains	196,000	108,000
Investment securities pledged as collateral	191,000,000		193,300,000
Amortized Cost [Abstract]
Due in one year or less	12,115,000
Due after one year through five years	75,759,000
Due after five years through ten years	76,556,000
Due after ten years	126,172,000
Total	290,602,000
Fair Value [Abstract]
Due in one year or less	12,227,000
Due after one year through five years	77,464,000
Due after five years through ten years	77,846,000
Due after ten years	131,042,000
Total	298,579,000
U.S. Agency Securities [Member]
Available for Sale Securities Amortized Cost, Gross Unrealized Gains or Losses and Fair Value [Abstract]
Amortized Cost	120,575,000		125,125,000
Gross Unrealized Gains	1,896,000		2,150,000
Gross Unrealized Losses	(37,000)		(41,000)
Fair Value	122,434,000		127,234,000
Available-For-Sale Securities, Fair Value and Gross Unrealized Losses [Abstract]
Less than Twelve Months, Fair Value	13,131,000		6,016,000
Twelve Months or Greater, Fair Value	0		0
Total, Fair Value	13,131,000		6,016,000
Less than Twelve Months, Gross Unrealized Losses	(37,000)		(41,000)
Twelve Months or Greater, Gross Unrealized Losses	0		0
Total, Gross Unrealized Losses	(37,000)		(41,000)
US Treasury Securities [Member]
Available for Sale Securities Amortized Cost, Gross Unrealized Gains or Losses and Fair Value [Abstract]
Amortized Cost	11,839,000		4,922,000
Gross Unrealized Gains	85,000		25,000
Gross Unrealized Losses	0		0
Fair Value	11,924,000		4,947,000
Obligations of State and Political Subdivisions [Member]
Available for Sale Securities Amortized Cost, Gross Unrealized Gains or Losses and Fair Value [Abstract]
Amortized Cost	90,503,000		95,288,000
Gross Unrealized Gains	4,711,000		5,721,000
Gross Unrealized Losses	(190,000)		(134,000)
Fair Value	95,024,000		100,875,000
Available-For-Sale Securities, Fair Value and Gross Unrealized Losses [Abstract]
Less than Twelve Months, Fair Value	9,303,000		7,981,000
Twelve Months or Greater, Fair Value	0		0
Total, Fair Value	9,303,000		7,981,000
Less than Twelve Months, Gross Unrealized Losses	(190,000)		(134,000)
Twelve Months or Greater, Gross Unrealized Losses	0		0
Total, Gross Unrealized Losses	(190,000)		(134,000)
Corporate Obligations [Member]
Available for Sale Securities Amortized Cost, Gross Unrealized Gains or Losses and Fair Value [Abstract]
Amortized Cost	21,287,000		21,699,000
Gross Unrealized Gains	459,000		452,000
Gross Unrealized Losses	(260,000)		(42,000)
Fair Value	21,486,000		22,109,000
Available-For-Sale Securities, Fair Value and Gross Unrealized Losses [Abstract]
Less than Twelve Months, Fair Value	8,330,000		10,972,000
Twelve Months or Greater, Fair Value	0		0
Total, Fair Value	8,330,000		10,972,000
Less than Twelve Months, Gross Unrealized Losses	(260,000)		(42,000)
Twelve Months or Greater, Gross Unrealized Losses	0		0
Total, Gross Unrealized Losses	(260,000)		(42,000)
Mortgage-backed Securities in Government Sponsored Entities [Member]
Available for Sale Securities Amortized Cost, Gross Unrealized Gains or Losses and Fair Value [Abstract]
Amortized Cost	46,398,000		52,072,000
Gross Unrealized Gains	1,435,000		1,728,000
Gross Unrealized Losses	(122,000)		(127,000)
Fair Value	47,711,000		53,673,000
Available-For-Sale Securities, Fair Value and Gross Unrealized Losses [Abstract]
Less than Twelve Months, Fair Value	4,666,000		8,651,000
Twelve Months or Greater, Fair Value	2,053,000		0
Total, Fair Value	6,719,000		8,651,000
Less than Twelve Months, Gross Unrealized Losses	(63,000)		(127,000)
Twelve Months or Greater, Gross Unrealized Losses	(59,000)		0
Total, Gross Unrealized Losses	(122,000)		(127,000)
Equity Securities in Financial Institutions [Member]
Available for Sale Securities Amortized Cost, Gross Unrealized Gains or Losses and Fair Value [Abstract]
Amortized Cost	912,000		912,000
Gross Unrealized Gains	685,000		502,000
Gross Unrealized Losses	0		0
Fair Value	$ 1,597,000		$ 1,414,000