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INVESTMENT SECURITIES - Available for sale (Details) - USD ($) $ in Thousands | Sep. 30, 2023 | Mar. 31, 2023
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INVESTMENT SECURITIES |  |
Amortized Cost | $ 225,156 | $ 235,591
Gross Unrealized Gains | 57 | 43
Gross Unrealized Losses | (31,229) | (24,135)
Estimated Fair Value | 193,984 | 211,499
Municipal securities |  |
INVESTMENT SECURITIES |  |
Amortized Cost | 47,752 | 47,857
Gross Unrealized Gains | 52 | 16
Gross Unrealized Losses | (10,149) | (7,612)
Estimated Fair Value | 37,655 | 40,261
Agency securities |  |
INVESTMENT SECURITIES |  |
Amortized Cost | 89,088 | 91,858
Gross Unrealized Gains |  | 23
Gross Unrealized Losses | (7,541) | (5,974)
Estimated Fair Value | 81,547 | 85,907
Real estate mortgage investment conduits |  |
INVESTMENT SECURITIES |  |
Amortized Cost | 32,751 | 34,247
Gross Unrealized Losses | (6,940) | (5,370)
Estimated Fair Value | 25,811 | 28,877
Residential mortgage-backed securities |  |
INVESTMENT SECURITIES |  |
Amortized Cost | 14,905 | 16,512
Gross Unrealized Gains | 1 |
Gross Unrealized Losses | (1,439) | (1,041)
Estimated Fair Value | 13,467 | 15,471
Other mortgage-backed securities |  |
INVESTMENT SECURITIES |  |
Amortized Cost | 40,660 | 45,117
Gross Unrealized Gains | 4 | 4
Gross Unrealized Losses | (5,160) | (4,138)
Estimated Fair Value | $ 35,504 | $ 40,983

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