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INVESTMENT SECURITIES - Held to maturity (Details) - USD ($) $ in Thousands | Sep. 30, 2025 | Mar. 31, 2025
--- | --- | ---
INVESTMENT SECURITIES |  |
Amortized Cost | $ 192,759 | $ 203,079
Gross Unrealized Losses | (23,447) | (27,687)
Estimated Fair Value | 169,312 | 175,392
Municipal securities |  |
INVESTMENT SECURITIES |  |
Amortized Cost | 10,283 | 10,296
Gross Unrealized Losses | (2,492) | (2,667)
Estimated Fair Value | 7,791 | 7,629
Agency securities |  |
INVESTMENT SECURITIES |  |
Amortized Cost | 42,329 | 42,279
Gross Unrealized Losses | (1,948) | (2,723)
Estimated Fair Value | 40,381 | 39,556
Real estate mortgage investment conduits |  |
INVESTMENT SECURITIES |  |
Amortized Cost | 26,828 | 28,499
Gross Unrealized Losses | (3,552) | (4,231)
Estimated Fair Value | 23,276 | 24,268
Residential mortgage-backed securities |  |
INVESTMENT SECURITIES |  |
Amortized Cost | 96,322 | 101,933
Gross Unrealized Losses | (13,252) | (15,448)
Estimated Fair Value | 83,070 | 86,485
Other mortgage-backed securities |  |
INVESTMENT SECURITIES |  |
Amortized Cost | 16,997 | 20,072
Gross Unrealized Losses | (2,203) | (2,618)
Estimated Fair Value | $ 14,794 | $ 17,454

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