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ALLOWANCE FOR LOAN LOSSES - Financing Receivables, Aging of Loans (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Mar. 31, 2020
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-accrual	$ 395	$ 1,395
Total Past Due and Non-accrual	812	1,666
Current	942,423	909,843
Total Loans Receivable	943,235	911,509
30 To 89 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due	241	271
90 Days and Greater Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due	176	0
Commercial Real Estate Portfolio Segment
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans Receivable	884,656	824,143
Commercial Real Estate Portfolio Segment | Commercial business
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-accrual	182	201
Total Past Due and Non-accrual	455	201
Current	264,690	178,828
Total Loans Receivable	265,145	179,029
Commercial Real Estate Portfolio Segment | Commercial business | 30 To 89 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due	98	0
Commercial Real Estate Portfolio Segment | Commercial business | 90 Days and Greater Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due	175	0
Commercial Real Estate Portfolio Segment | Commercial real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-accrual	144	1,014
Total Past Due and Non-accrual	144	1,014
Current	543,323	506,857
Total Loans Receivable	543,467	507,871
Commercial Real Estate Portfolio Segment | Commercial real estate | 30 To 89 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due	0	0
Commercial Real Estate Portfolio Segment | Commercial real estate | 90 Days and Greater Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due	0	0
Commercial Real Estate Portfolio Segment | Land
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-accrual	0	0
Total Past Due and Non-accrual	0	0
Current	14,040	14,026
Total Loans Receivable	14,040	14,026
Commercial Real Estate Portfolio Segment | Land | 30 To 89 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due	0	0
Commercial Real Estate Portfolio Segment | Land | 90 Days and Greater Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due	0	0
Commercial Real Estate Portfolio Segment | Multi-family
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-accrual	0	0
Total Past Due and Non-accrual	0	0
Current	45,014	58,374
Total Loans Receivable	45,014	58,374
Commercial Real Estate Portfolio Segment | Multi-family | 30 To 89 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due	0	0
Commercial Real Estate Portfolio Segment | Multi-family | 90 Days and Greater Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due	0	0
Commercial Real Estate Portfolio Segment | Real estate construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-accrual	0	0
Total Past Due and Non-accrual	0	0
Current	16,990	64,843
Total Loans Receivable	16,990	64,843
Commercial Real Estate Portfolio Segment | Real estate construction | 30 To 89 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due	0	0
Commercial Real Estate Portfolio Segment | Real estate construction | 90 Days and Greater Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due	0	0
Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Non-accrual	69	180
Total Past Due and Non-accrual	213	451
Current	58,366	86,915
Total Loans Receivable	58,579	87,366
Consumer | 30 To 89 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due	143	271
Consumer | 90 Days and Greater Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Past Due	$ 1	$ 0

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Amount before allowance of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Includes deferred interest and fees, undisbursed portion of loan balance, unamortized costs and premiums and discounts from face amounts. Excludes loans and leases covered under loss sharing agreements.

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