Accumulated Other Comprehensive Income (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended		9 Months Ended				3 Months Ended		9 Months Ended				3 Months Ended				9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Jun. 30, 2014	Jun. 30, 2013	Sep. 30, 2014	Sep. 30, 2013	Mar. 31, 2014	Mar. 31, 2013	Sep. 30, 2014 Net Unrealized (Loss) on Securities [Member]	Sep. 30, 2013 Net Unrealized (Loss) on Securities [Member]	Sep. 30, 2014 Net Unrealized (Loss) on Securities [Member]	Sep. 30, 2013 Net Unrealized (Loss) on Securities [Member]	Mar. 31, 2014 Net Unrealized (Loss) on Securities [Member]	Mar. 31, 2013 Net Unrealized (Loss) on Securities [Member]	Sep. 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]	Sep. 30, 2014 Adjustment related to Pension Benefits [Member]	Sep. 30, 2013 Adjustment related to Pension Benefits [Member]	Sep. 30, 2014 Adjustment related to Pension Benefits [Member]	Sep. 30, 2013 Adjustment related to Pension Benefits [Member]	Mar. 31, 2014 Adjustment related to Pension Benefits [Member]	Mar. 31, 2013 Adjustment related to Pension Benefits [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning, balance			$ 2,520	$ 7,597	$ 2,520	$ 7,597	$ 5,147	$ 2,150			$ 3,578	$ 9,800	$ 6,205	$ 4,353					$ (1,058)	$ (2,203)	$ (1,058)	$ (2,203)
Net unrealized losses on securities available for sale, net of tax	(222)	126			2,528	(5,192)			(222)	126	2,528	(5,192)					0	0	0	0
Reclassification adjustment for gains on securities, net of tax	(205)	(3)			(328)	(132)			(205)	(3)	(328)	(132)					0	0	0	0
Ending, balance	4,720	2,273			4,720	2,273	5,147	2,150	5,778	4,476	5,778	4,476	6,205	4,353			(1,058)	(2,203)	(1,058)	(2,203)	(1,058)	(2,203)
Net unrealized losses on securities available for sale, tax	(121)	67	1,360	(2,796)	1,360	(2,796)
Reclassification adjustment for gains on securities, tax	110	1	176	71	176	71
Reclassification Adjustment Out Of Accumulated Other Comprehensive Income [Line Items]
Securities gains, net	315	4			504	203									315	504
Income Taxes	1,446	1,562			4,038	4,992									(110)	(176)
Net income	$ 3,168	$ 4,243			$ 9,851	$ 12,604									$ 205	$ 328