Accumulated Other Comprehensive Income (Loss) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013	Mar. 31, 2014	Mar. 31, 2013
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance at the beginning of the period			$ (5,188)	$ 1,240	$ (1,933)	$ (2,591)
Changes in unrealized securities' holding gain (loss), net of taxes	481	(2,324)	3,733	(6,038)
Reclassified amounts out of accumulated other comprehensive income, net of tax	0	0	(3)	117
Balance at the end of the period	(1,452)	(4,915)	(1,452)	(4,915)	(1,933)	(2,591)
Other Comprehensive Income (Loss), before Reclassifications, Tax	246	1,197	1,926	3,110
Reclassification from Accumulated Other Comprehensive Income, Current Period, Tax		60		60
Unrealized securities gains and losses
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance at the beginning of the period			(3,892)	3,295	(637)	(536)
Changes in unrealized securities' holding gain (loss), net of taxes	481	(2,324)	3,733	(6,038)
Reclassified amounts out of accumulated other comprehensive income, net of tax	0	0	(3)	117
Balance at the end of the period	(156)	(2,860)	(156)	(2,860)	(637)	(536)
Pension and post- retirement costs
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance at the beginning of the period			(1,296)	(2,055)	(1,296)	(2,055)
Changes in unrealized securities' holding gain (loss), net of taxes	0	0	0	0
Reclassified amounts out of accumulated other comprehensive income, net of tax	0	0	0	0
Balance at the end of the period	$ (1,296)	$ (2,055)	$ (1,296)	$ (2,055)	$ (1,296)	$ (2,055)