Components of Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2019	Dec. 31, 2018
Statement of Comprehensive Income [Abstract]
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Net of Tax			$ 0
Accumulated Other Comprehensive Loss, Available-for-sale Securities Adjustment, Net of Tax			(939)	$ (2,726)
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Investment Transferred from Available-for-sale to Equity Method, after Tax				721
Other comprehensive loss, net of taxes	$ (98)	$ 972	923	286
Accumulated Other Comprehensive Loss, Available-for-sale Securities Adjustment, Net of Tax	$ (16)	$ (1,719)	$ (16)	$ (1,719)