Other Comprehensive Income (Loss) Components of Accumulated Other Comprehensive Income (Loss) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013	Mar. 31, 2014	Mar. 31, 2013
Other Comprehensive Income (Loss) [Abstract]
Accumulated Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, Net of Tax	$ (3,059)	$ (4,855)	$ (3,059)	$ (4,855)	$ (4,768)	$ 1,064
Net unrealized loss on securities available-for-sale			1,709	(5,919)
Accumulated Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Net of Tax		(501)		(501)		(501)
Other Comprehensive (Income) Loss, Pension and Other Postretirement Benefit Plans, Adjustment, Net of Tax				0
Accumulated Other Comprehensive Income (Loss)	(3,059)	(5,356)	(3,059)	(5,356)	(4,768)	563
Other Comprehensive Income (Loss), Net of Tax	$ 150	$ (1,522)	$ 1,709	$ (5,919)