Other Comprehensive Income (Loss) - Components of AOCI (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]
Net unrealized (loss) income on securities available-for-sale	$ (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 income, net of tax	1,871	1,066
Net unrealized (loss) income on securities available-for-sale	$ 932	$ (939)