Other Comprehensive Income (Loss) Components of Accumulated Other Comprehensive Income (Loss) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended	9 Months Ended		12 Months Ended
	Dec. 31, 2013	Dec. 31, 2014	Dec. 31, 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	$ (6,422)	$ (1,959)	$ (6,422)	$ (4,768)	$ 1,064
Net unrealized loss on securities available-for-sale		2,809	(7,486)
Accumulated Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Net of Tax	0		0		(501)
Pension plan adjustment	(432)		(716)	(716)
Other Comprehensive (Income) Loss, Pension and Other Postretirement Benefit Plans, Adjustment, Net of Tax			1,217
Accumulated Other Comprehensive Income (Loss)	(6,422)	(1,959)	(6,422)	(4,768)	563
Other Comprehensive Income (Loss), Net of Tax			$ (6,269)