Other Comprehensive Income (Loss) Components of Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands	9 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Mar. 31, 2016	Mar. 31, 2015
Other Comprehensive Income (Loss), Net of Tax [Abstract]
Accumulated Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, Net of Tax	$ (2,101)	$ (1,410)	$ (307)	$ (1,045)
Net unrealized loss on securities available-for-sale	(1,794)	(365)
Accumulated Other Comprehensive Income (Loss)	(2,101)	(1,410)	$ (307)	$ (1,045)
Other Comprehensive Income (Loss), Net of Tax	$ (1,794)	$ (365)