Accumulated Other Comprehensive Income (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Net Unrealized Gains (Losses) on Securities [Abstract]
Balance, beginning	$ 9,800	$ 8,832	$ 1,277	$ 2,700
Net unrealized losses on securities available for sale, net of tax	(6,097)	1,071	7,554	(1,341)
Reclassification adjustment for gains on securities, net of tax	(125)	(103)	1	(102)
Reclassification adjustment for gains on securities, other-than temporarily impaired, net of tax				20
Ending, balance	3,578	9,800	8,832	1,277
Adjustments Related to Pension Benefits [Abstract]
Beginning, balance	(2,203)	(2,002)	(1,436)	(1,591)
Change in unfunded pension liability, net of tax	1,145	(201)	(566)	155
Ending, balance	(1,058)	(2,203)	(2,002)	(1,436)
Accumulated Other Comprehensive Income (Loss) [Abstract]
Beginning, balance	7,597	6,830	(159)	1,109
Net unrealized losses on securities available for sale, net of tax	(6,097)	1,071	7,554	(1,341)
Reclassification adjustment for gains on securities, net of tax	(125)	(103)		(102)
Reclassification adjustment for losses on securities other-than temporarily impaired, net of tax,				20
Change in unfunded pension liability, net of tax	1,145	(201)	(566)	155
Ending, balance	2,520	7,597	6,830	(159)
Change in unrealized gains on securities available for sale, tax	(3,282)	576	4,068
Reclassification adjustment for gains on securities, tax	67	55	0
Reclassification adjustment for losses on impairment of securities, tax	0	0	0
Change in unfunded pension liability, tax	616	(108)	(305)
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]
Securities gains, net	192	158	(1)
Income Taxes	6,054	6,293	4,910
Net income	15,747	16,006	11,571
Realized Investment Gains Losses [Member] | Reclassification Out Of Accumulated Other Comprehensive Income [Member]
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]
Securities gains, net	192	158
Income Taxes	(67)	(55)
Net income	$ 125	$ 103