Investments (Details) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015 USD ($) Security	Jun. 30, 2014 USD ($)	Jun. 30, 2015 USD ($) Security	Jun. 30, 2014 USD ($)	Dec. 31, 2014 USD ($)
Available for Sale Securities Amortized Cost, Gross Unrealized Gains and Losses, and Fair Value [Abstract]
Amortized Cost	$ 301,110		$ 301,110		$ 301,459
Gross Unrealized Gains	4,492		4,492		5,603
Gross Unrealized Losses	(810)		(810)		(916)
Fair Value	$ 304,792		$ 304,792		306,146
Number of securities owned with fair value than cost | Security	72		72
Available-For-Sale Securities, Fair Value and Gross Unrealized Losses [Abstract]
Less than Twelve Months, Fair Value	$ 94,444		$ 94,444		36,508
Twelve Months or Greater, Fair Value	18,579		18,579		67,011
Total, Fair Value	113,023		113,023		103,519
Less than Twelve Months, Gross Unrealized Losses	(617)		(617)		(134)
Twelve Months or Greater, Gross Unrealized Losses	(193)		(193)		(782)
Total, Gross Unrealized Losses	$ (810)		(810)		(916)
Duration securities impaired, Minimum	1 year
Proceeds from sale of securities available-for-sale	$ 3,770	$ 6,595	18,393	$ 12,151
Realized investment gains (losses) [Abstract]
Gross gains	175	75	312	246
Gross losses	0	0	(11)	0
Net gains	175	$ 75	301	$ 246
Investment securities pledged as collateral	170,900		170,900		186,400
Amortized Cost [Abstract]
Due in one year or less	3,420		3,420
Due after one year through five years	166,695		166,695
Due after five years through ten years	44,355		44,355
Due after ten years	85,322		85,322
Total	299,792		299,792
Fair Value [Abstract]
Due in one year or less	3,459		3,459
Due after one year through five years	167,737		167,737
Due after five years through ten years	45,146		45,146
Due after ten years	86,675		86,675
Total	303,017		303,017
U.S. Agency Securities [Member]
Available for Sale Securities Amortized Cost, Gross Unrealized Gains and Losses, and Fair Value [Abstract]
Amortized Cost	167,187		167,187		150,847
Gross Unrealized Gains	778		778		638
Gross Unrealized Losses	(385)		(385)		(600)
Fair Value	167,580		167,580		150,885
Available-For-Sale Securities, Fair Value and Gross Unrealized Losses [Abstract]
Less than Twelve Months, Fair Value	60,908		60,908		27,382
Twelve Months or Greater, Fair Value	10,910		10,910		43,642
Total, Fair Value	71,818		71,818		71,024
Less than Twelve Months, Gross Unrealized Losses	(302)		(302)		(110)
Twelve Months or Greater, Gross Unrealized Losses	(83)		(83)		(490)
Total, Gross Unrealized Losses	(385)		(385)		(600)
US Treasury Securities [Member]
Available for Sale Securities Amortized Cost, Gross Unrealized Gains and Losses, and Fair Value [Abstract]
Amortized Cost					4,944
Gross Unrealized Gains					0
Gross Unrealized Losses					(95)
Fair Value					4,849
Available-For-Sale Securities, Fair Value and Gross Unrealized Losses [Abstract]
Less than Twelve Months, Fair Value					0
Twelve Months or Greater, Fair Value					4,849
Total, Fair Value					4,849
Less than Twelve Months, Gross Unrealized Losses					0
Twelve Months or Greater, Gross Unrealized Losses					(95)
Total, Gross Unrealized Losses					(95)
Obligations of State and Political Subdivisions [Member]
Available for Sale Securities Amortized Cost, Gross Unrealized Gains and Losses, and Fair Value [Abstract]
Amortized Cost	93,796		93,796		101,281
Gross Unrealized Gains	2,829		2,829		3,854
Gross Unrealized Losses	(343)		(343)		(99)
Fair Value	96,282		96,282		105,036
Available-For-Sale Securities, Fair Value and Gross Unrealized Losses [Abstract]
Less than Twelve Months, Fair Value	23,486		23,486		3,596
Twelve Months or Greater, Fair Value	5,212		5,212		8,584
Total, Fair Value	28,698		28,698		12,180
Less than Twelve Months, Gross Unrealized Losses	(263)		(263)		(19)
Twelve Months or Greater, Gross Unrealized Losses	(80)		(80)		(80)
Total, Gross Unrealized Losses	(343)		(343)		(99)
Corporate Obligations [Member]
Available for Sale Securities Amortized Cost, Gross Unrealized Gains and Losses, and Fair Value [Abstract]
Amortized Cost	12,713		12,713		13,853
Gross Unrealized Gains	141		141		190
Gross Unrealized Losses	(49)		(49)		(85)
Fair Value	12,805		12,805		13,958
Available-For-Sale Securities, Fair Value and Gross Unrealized Losses [Abstract]
Less than Twelve Months, Fair Value	5,434		5,434		505
Twelve Months or Greater, Fair Value	2,184		2,184		7,707
Total, Fair Value	7,618		7,618		8,212
Less than Twelve Months, Gross Unrealized Losses	(31)		(31)		(1)
Twelve Months or Greater, Gross Unrealized Losses	(18)		(18)		(84)
Total, Gross Unrealized Losses	(49)		(49)		(85)
Mortgage-backed Securities in Government Sponsored Entities [Member]
Available for Sale Securities Amortized Cost, Gross Unrealized Gains and Losses, and Fair Value [Abstract]
Amortized Cost	26,096		26,096		29,397
Gross Unrealized Gains	287		287		368
Gross Unrealized Losses	(33)		(33)		(37)
Fair Value	26,350		26,350		29,728
Available-For-Sale Securities, Fair Value and Gross Unrealized Losses [Abstract]
Less than Twelve Months, Fair Value	4,616		4,616		5,025
Twelve Months or Greater, Fair Value	273		273		2,229
Total, Fair Value	4,889		4,889		7,254
Less than Twelve Months, Gross Unrealized Losses	(21)		(21)		(4)
Twelve Months or Greater, Gross Unrealized Losses	(12)		(12)		(33)
Total, Gross Unrealized Losses	(33)		(33)		(37)
Equity Securities in Financial Institutions [Member]
Available for Sale Securities Amortized Cost, Gross Unrealized Gains and Losses, and Fair Value [Abstract]
Amortized Cost	1,318		1,318		1,137
Gross Unrealized Gains	457		457		553
Gross Unrealized Losses	0		0		0
Fair Value	$ 1,775		$ 1,775		$ 1,690