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INVESTMENT SECURITIES (Tables) | 6 Months Ended
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Sep. 30, 2025
INVESTMENT SECURITIES |
Schedule of amortized cost and approximate fair value of investment securities | The amortized cost and approximate fair value of investment securities consisted of the following at the dates indicated (in thousands): ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | ​ | ​ |  | Gross |  | Gross |  | Estimated
​ | ​ | Amortized | ​ | Unrealized | ​ | Unrealized | ​ | Fair
​ | ​ | Cost | ​ | Gains | ​ | Losses | ​ | Value
September 30, 2025 |  | ​ |  |  | ​ |  |  | ​ |  |  | ​ |
Available for sale: |  | ​ | ​ |  | ​ |  |  | ​ |  |  | ​ |
Municipal securities | ​ | $ | 36,919 | ​ | $ | 3 | ​ | $ | (5,081) | ​ | $ | 31,841
Agency securities | ​ |  | 32,953 | ​ | ​ | — | ​ | ​ | (2,019) | ​ | ​ | 30,934
Real estate mortgage investment conduits (1) | ​ |  | 27,286 | ​ | ​ | — | ​ | ​ | (4,396) | ​ | ​ | 22,890
Residential mortgage-backed securities (1) | ​ |  | 9,592 | ​ | ​ | 13 | ​ | ​ | (436) | ​ | ​ | 9,169
Other mortgage-backed securities (2) | ​ |  | 25,871 | ​ | ​ | 3 | ​ | ​ | (2,261) | ​ | ​ | 23,613
Total available for sale | ​ | $ | 132,621 | ​ | $ | 19 | ​ | $ | (14,193) | ​ | $ | 118,447
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Held to maturity: | ​ |  | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Municipal securities | ​ | $ | 10,283 | ​ | $ | — | ​ | $ | (2,492) | ​ | $ | 7,791
Agency securities | ​ | ​ | 42,329 | ​ | ​ | — | ​ | ​ | (1,948) | ​ | ​ | 40,381
Real estate mortgage investment conduits (1) | ​ | ​ | 26,828 | ​ | ​ | — | ​ | ​ | (3,552) | ​ | ​ | 23,276
Residential mortgage-backed securities (1) | ​ | ​ | 96,322 | ​ | ​ | — | ​ | ​ | (13,252) | ​ | ​ | 83,070
Other mortgage-backed securities (3) | ​ | ​ | 16,997 | ​ | ​ | — | ​ | ​ | (2,203) | ​ | ​ | 14,794
Total held to maturity | ​ | $ | 192,759 | ​ | $ | — | ​ | $ | (23,447) | ​ | $ | 169,312
​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | ​ | ​ |  | Gross |  | Gross |  | ​ | ​
​ | ​ | Amortized | ​ | Unrealized | ​ | Unrealized | ​ | Estimated
​ | ​ | Cost | ​ | Gains | ​ | Losses | ​ | Fair Value
March 31, 2025 |  | ​ |  |  | ​ |  |  | ​ |  |  | ​ |
Available for sale: |  | ​ |  |  | ​ |  |  | ​ |  |  | ​ |
Municipal securities | ​ | $ | 37,280 | ​ | $ | 1 | ​ | $ | (6,262) | ​ | $ | 31,019
Agency securities | ​ |  | 32,944 | ​ | ​ | — | ​ | ​ | (2,741) | ​ | ​ | 30,203
Real estate mortgage investment conduits (1) | ​ |  | 28,597 | ​ | ​ | — | ​ | ​ | (5,107) | ​ | ​ | 23,490
Residential mortgage-backed securities (1) | ​ |  | 10,802 | ​ | ​ | 13 | ​ | ​ | (589) | ​ | ​ | 10,226
Other mortgage-backed securities (2) | ​ |  | 27,317 | ​ | ​ | 4 | ​ | ​ | (2,823) | ​ | ​ | 24,498
Total available for sale | ​ | $ | 136,940 | ​ | $ | 18 | ​ | $ | (17,522) | ​ | $ | 119,436
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Held to maturity: | ​ |  | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Municipal securities | ​ | $ | 10,296 | ​ | $ | — | ​ | $ | (2,667) | ​ | $ | 7,629
Agency securities | ​ | ​ | 42,279 | ​ | ​ | — | ​ | ​ | (2,723) | ​ | ​ | 39,556
Real estate mortgage investment conduits (1) | ​ | ​ | 28,499 | ​ | ​ | — | ​ | ​ | (4,231) | ​ | ​ | 24,268
Residential mortgage-backed securities (1) | ​ | ​ | 101,933 | ​ | ​ | — | ​ | ​ | (15,448) | ​ | ​ | 86,485
Other mortgage-backed securities (3) | ​ | ​ | 20,072 | ​ | ​ | — | ​ | ​ | (2,618) | ​ | ​ | 17,454
Total held to maturity | ​ | $ | 203,079 | ​ | $ | — | ​ | $ | (27,687) | ​ | $ | 175,392
​
(1) | Comprised of Federal Home Loan Mortgage Corporation (“FHLMC”), Federal National Mortgage Association (“FNMA”) and Ginnie Mae (“GNMA”) issued securities.
(2) | Comprised of U.S. Small Business Administration (“SBA”) issued securities and commercial real estate (“CRE”) secured securities issued by FNMA and FHLMC.
(3) | Comprised of FHLMC and FNMA issued securities.
Schedule of contractual maturities of investment securities | The contractual maturities of investment securities as of September 30, 2025 are as follows (in thousands): ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Available for Sale | ​ | Held to Maturity
​ |  | ​ | ​ |  | Estimated |  | ​ | ​ |  | Estimated
​ | ​ | Amortized | ​ | Fair | ​ | Amortized | ​ | Fair
​ | ​ | Cost | ​ | Value | ​ | Cost | ​ | Value
Due in one year or less | ​ | $ | 202 | ​ | $ | 198 | ​ | $ | 10,829 | ​ | $ | 10,773
Due after one year through five years | ​ |  | 48,398 | ​ |  | 45,668 | ​ |  | 28,501 | ​ |  | 27,055
Due after five years through ten years | ​ |  | 33,704 | ​ |  | 29,794 | ​ |  | 20,612 | ​ |  | 18,102
Due after ten years | ​ |  | 50,317 | ​ |  | 42,787 | ​ |  | 132,817 | ​ |  | 113,382
Total | ​ | $ | 132,621 | ​ | $ | 118,447 | ​ | $ | 192,759 | ​ | $ | 169,312
Schedule of fair value of temporarily impaired investment securities available-for-sale and held to maturity and unrealized losses | The fair value of temporarily impaired investment securities, the amount of unrealized losses and the length of time these unrealized losses existed are as follows at the dates indicated (in thousands):
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Less than 12 months | ​ | 12 months or longer | ​ | Total
​ |  | Estimated |  | ​ | ​ |  | Estimated |  | ​ | ​ |  | Estimated |  | ​ | ​
​ | ​ | Fair | ​ | Unrealized | ​ | Fair | ​ | Unrealized | ​ | Fair | ​ | Unrealized
September 30, 2025 | ​ | Value | ​ | Losses | ​ | Value | ​ | Losses | ​ | Value | ​ | Losses
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Available for sale: | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  |
Municipal securities | ​ | $ | — | ​ | $ | — | ​ | $ | 30,667 | ​ | $ | (5,081) | ​ | $ | 30,667 | ​ | $ | (5,081)
Agency securities | ​ |  | — | ​ |  | — | ​ |  | 30,934 | ​ |  | (2,019) | ​ |  | 30,934 | ​ |  | (2,019)
Real estate mortgage investment conduits (1) | ​ |  | — | ​ |  | — | ​ |  | 22,890 | ​ |  | (4,396) | ​ |  | 22,890 | ​ |  | (4,396)
Residential mortgage-backed securities (1) | ​ |  | — | ​ |  | — | ​ |  | 8,580 | ​ |  | (436) | ​ |  | 8,580 | ​ |  | (436)
Other mortgage-backed securities (2) | ​ |  | 649 | ​ |  | (6) | ​ |  | 22,873 | ​ |  | (2,255) | ​ |  | 23,522 | ​ |  | (2,261)
Total available for sale | ​ | $ | 649 | ​ | $ | (6) | ​ | $ | 115,944 | ​ | $ | (14,187) | ​ | $ | 116,593 | ​ | $ | (14,193)
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Held to maturity: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Municipal securities | ​ | $ | — | ​ | $ | — | ​ | $ | 7,791 | ​ | $ | (2,492) | ​ | $ | 7,791 | ​ | $ | (2,492)
Agency securities | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 40,381 | ​ | ​ | (1,948) | ​ | ​ | 40,381 | ​ | ​ | (1,948)
Real estate mortgage investment conduits (1) | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 23,276 | ​ | ​ | (3,552) | ​ | ​ | 23,276 | ​ | ​ | (3,552)
Residential mortgage-backed securities (1) | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 83,070 | ​ | ​ | (13,252) | ​ | ​ | 83,070 | ​ | ​ | (13,252)
Other mortgage-backed securities (3) | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 14,794 | ​ | ​ | (2,203) | ​ | ​ | 14,794 | ​ | ​ | (2,203)
Total held to maturity | ​ | $ | — | ​ | $ | — | ​ | $ | 169,312 | ​ | $ | (23,447) | ​ | $ | 169,312 | ​ | $ | (23,447)
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
March 31, 2025 |  | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  |  | ​ |
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Available for sale: |  | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  |  | ​ |
Municipal securities | ​ | $ | — | ​ | $ | — | ​ | $ | 29,849 | ​ | $ | (6,262) | ​ | $ | 29,849 | ​ | $ | (6,262)
Agency securities | ​ | ​ | — | ​ |  | — | ​ |  | 30,203 | ​ |  | (2,741) | ​ |  | 30,203 | ​ |  | (2,741)
Real estate mortgage investment conduits (1) | ​ |  | — | ​ |  | — | ​ |  | 23,490 | ​ |  | (5,107) | ​ |  | 23,490 | ​ |  | (5,107)
Residential mortgage-backed securities (1) | ​ |  | — | ​ |  | — | ​ |  | 9,540 | ​ |  | (589) | ​ |  | 9,540 | ​ |  | (589)
Other mortgage-backed securities (2) | ​ |  | 418 | ​ |  | (3) | ​ |  | 23,816 | ​ |  | (2,820) | ​ |  | 24,234 | ​ |  | (2,823)
Total available for sale | ​ | $ | 418 | ​ | $ | (3) | ​ | $ | 116,898 | ​ | $ | (17,519) | ​ | $ | 117,316 | ​ | $ | (17,522)
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Held to maturity: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Municipal securities | ​ | $ | — | ​ | $ | — | ​ | $ | 7,629 | ​ | $ | (2,667) | ​ | $ | 7,629 | ​ | $ | (2,667)
Agency securities | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 39,556 | ​ | ​ | (2,723) | ​ | ​ | 39,556 | ​ | ​ | (2,723)
Real estate mortgage investment conduits (1) | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 24,268 | ​ | ​ | (4,231) | ​ | ​ | 24,268 | ​ | ​ | (4,231)
Residential mortgage-backed securities (1) | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 86,485 | ​ | ​ | (15,448) | ​ | ​ | 86,485 | ​ | ​ | (15,448)
Other mortgage-backed securities (3) | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 17,454 | ​ | ​ | (2,618) | ​ | ​ | 17,454 | ​ | ​ | (2,618)
Total held to maturity | ​ | $ | — | ​ | $ | — | ​ | $ | 175,392 | ​ | $ | (27,687) | ​ | $ | 175,392 | ​ | $ | (27,687)
​
(1) | Comprised of FHLMC, FNMA and GNMA issued securities.
(2) | Comprised of SBA and CRE secured securities issued by FHLMC and FNMA.
(3) | Comprised of FHLMC and FNMA issued securities.

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