ALLOWANCE FOR LOAN LOSSES - TDRs by Interest Accrual Status (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Mar. 31, 2021
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accrual	$ 515	$ 3,317
Nonaccrual	243	264
Total	758	3,581
Commercial Real Estate Portfolio Segment | Commercial Business
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accrual	0	0
Nonaccrual	110	120
Total	110	120
Commercial Real Estate Portfolio Segment | Commercial Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accrual	0	1,324
Nonaccrual	133	144
Total	133	1,468
Commercial Real Estate Portfolio Segment | Land
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accrual	0	710
Nonaccrual	0	0
Total	0	710
Commercial Real Estate Portfolio Segment | Multi-Family
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accrual	0	753
Nonaccrual	0	0
Total	0	753
Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accrual	515	530
Nonaccrual	0	0
Total	$ 515	$ 530