Other Comprehensive Income (Loss) - Components of AOCI (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]
Net unrealized loss on securities available-for-sale	$ (6,662)	$ (3,175)
Other comprehensive income, net of tax	(5,553)	(3,487)
Net unrealized loss on securities available-for-sale	$ (12,215)	$ (6,662)