Non-interest Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Disaggregation of Revenue [Line Items]
Noninterest income	$ 1,973	$ 1,010	$ 3,656	$ 1,952
Noninterest income out of scope of ASU 606
Disaggregation of Revenue [Line Items]
Noninterest income	517	115	1,463	164
Noninterest income in scope of ASU 606
Disaggregation of Revenue [Line Items]
Noninterest income	1,456	895	2,193	1,788
Depository fees and charges | Noninterest income in scope of ASU 606
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer	762	811	1,349	1,615
Loan fees and service charges | Noninterest income in scope of ASU 606
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer	82	70	140	146
Other noninterest income | Noninterest income in scope of ASU 606
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer	$ 612	$ 14	$ 704	$ 27