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INVESTMENT SECURITIES - Available for sale (Details) - USD ($) $ in Thousands | Dec. 31, 2023 | Mar. 31, 2023
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INVESTMENT SECURITIES |  |
Amortized Cost | $ 219,429 | $ 235,591
Gross Unrealized Gains | 56 | 43
Gross Unrealized Losses | (23,024) | (24,135)
Estimated Fair Value | 196,461 | 211,499
Municipal securities |  |
INVESTMENT SECURITIES |  |
Amortized Cost | 47,719 | 47,857
Gross Unrealized Gains | 49 | 16
Gross Unrealized Losses | (7,461) | (7,612)
Estimated Fair Value | 40,307 | 40,261
Agency securities |  |
INVESTMENT SECURITIES |  |
Amortized Cost | 89,206 | 91,858
Gross Unrealized Gains |  | 23
Gross Unrealized Losses | (5,214) | (5,974)
Estimated Fair Value | 83,992 | 85,907
Real estate mortgage investment conduits |  |
INVESTMENT SECURITIES |  |
Amortized Cost | 32,021 | 34,247
Gross Unrealized Losses | (5,601) | (5,370)
Estimated Fair Value | 26,420 | 28,877
Residential mortgage-backed securities |  |
INVESTMENT SECURITIES |  |
Amortized Cost | 14,191 | 16,512
Gross Unrealized Gains | 3 |
Gross Unrealized Losses | (898) | (1,041)
Estimated Fair Value | 13,296 | 15,471
Other mortgage-backed securities |  |
INVESTMENT SECURITIES |  |
Amortized Cost | 36,292 | 45,117
Gross Unrealized Gains | 4 | 4
Gross Unrealized Losses | (3,850) | (4,138)
Estimated Fair Value | $ 32,446 | $ 40,983

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