Accumulated Other Comprehensive Income (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended		3 Months Ended		6 Months Ended		3 Months Ended				6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014 Net Unrealized (Loss) on Securities [Member]	Jun. 30, 2013 Net Unrealized (Loss) on Securities [Member]	Jun. 30, 2014 Net Unrealized (Loss) on Securities [Member]	Jun. 30, 2013 Net Unrealized (Loss) on Securities [Member]	Jun. 30, 2014 Net Unrealized (Loss) on Securities [Member] Reclassification Out Of Accumulated Other Comprehensive Income [Member]	Mar. 31, 2013 Net Unrealized (Loss) on Securities [Member] Reclassification Out Of Accumulated Other Comprehensive Income [Member]	Jun. 30, 2014 Adjustment related to Pension Benefits [Member]	Jun. 30, 2013 Adjustment related to Pension Benefits [Member]	Jun. 30, 2014 Adjustment related to Pension Benefits [Member]	Jun. 30, 2013 Adjustment related to Pension Benefits [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning, balance	$ 3,671	$ 6,895	$ 2,520	$ 7,597	$ 4,729	$ 9,098	$ 3,578	$ 9,800			$ (1,058)	$ (2,203)	$ (1,058)	$ (2,203)
Net unrealized losses on securities available for sale, net of tax	1,574	(4,745)	2,750	(5,318)	1,574	(4,745)	2,750	(5,318)			0	0	0	0
Reclassification adjustment for gains on securities, net of tax	(98)	0	(123)	(129)	(98)	0	(123)	(129)			0	0	0	0
Ending, balance	5,147	2,150	5,147	2,150	6,205	4,353	6,205	4,353			(1,058)	(2,203)	(1,058)	(2,203)
Net unrealized losses on securities available for sale, tax	848	(2,554)	1,481	(2,863)
Reclassification adjustment for gains on securities, tax	52	1	66	70
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]
Securities gains, net	150	1	189	199					150	189
Income Taxes	1,303	1,741	2,592	3,430					(52)	(66)
Net income	$ 3,233	$ 4,210	$ 6,683	$ 8,361					$ 98	$ 123