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INVESTMENT SECURITIES - Held to maturity (Details) - USD ($) $ in Thousands | Dec. 31, 2024 | Mar. 31, 2024
--- | --- | ---
INVESTMENT SECURITIES |  |
Amortized Cost | $ 212,295 | $ 229,510
Gross Unrealized Losses | (31,821) | (33,991)
Estimated Fair Value | 180,474 | 195,519
Municipal securities |  |
INVESTMENT SECURITIES |  |
Amortized Cost | 10,302 | 10,321
Gross Unrealized Losses | (2,945) | (2,789)
Estimated Fair Value | 7,357 | 7,532
Agency securities |  |
INVESTMENT SECURITIES |  |
Amortized Cost | 48,253 | 54,123
Gross Unrealized Losses | (3,368) | (4,522)
Estimated Fair Value | 44,885 | 49,601
Real estate mortgage investment conduits |  |
INVESTMENT SECURITIES |  |
Amortized Cost | 29,249 | 31,752
Gross Unrealized Losses | (4,786) | (5,171)
Estimated Fair Value | 24,463 | 26,581
Residential mortgage-backed securities |  |
INVESTMENT SECURITIES |  |
Amortized Cost | 104,314 | 112,834
Gross Unrealized Losses | (17,686) | (18,196)
Estimated Fair Value | 86,628 | 94,638
Other mortgage-backed securities |  |
INVESTMENT SECURITIES |  |
Amortized Cost | 20,177 | 20,480
Gross Unrealized Losses | (3,036) | (3,313)
Estimated Fair Value | $ 17,141 | $ 17,167

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