Non-interest Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2020	Dec. 31, 2019
Disaggregation of Revenue [Line Items]
Noninterest income	$ 899	$ 965	$ 4,555	$ 2,915
Noninterest income out of scope of ASU 606
Disaggregation of Revenue [Line Items]
Noninterest income	162	35	1,625	197
Noninterest income in scope of ASU 606
Disaggregation of Revenue [Line Items]
Noninterest income	737	930	2,930	2,718
Depository fees and charges | Noninterest income in scope of ASU 606
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer	692	846	2,041	2,461
Loan fees and service charges | Noninterest income in scope of ASU 606
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer	27	70	167	216
Other noninterest income | Noninterest income in scope of ASU 606
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer	$ 18	$ 14	$ 722	$ 41