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Investment Securities-Schedule of Unrealized Loss (Details) - USD ($) $ in Thousands | Sep. 30, 2025 | Mar. 31, 2025
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Debt Securities, Available-for-sale, Unrealized Loss Position [Line Items] |  |
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss | $ (10) | $ (11)
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months | 2,256 | 3,467
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss | (11,003) | (11,947)
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer | 40,467 | 40,846
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss | (11,013) | (11,958)
Debt Securities, Available-for-sale, Unrealized Loss Position | 42,723 | 44,313
Schedule of Held-to-maturity Securities [Line Items] |  |
Debt Securities, Held-to-maturity, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss | 0 | 0
Debt Securities, Held-to-maturity, Continuous Unrealized Loss Position, Less than 12 Months, Fair Value | 0 | 0
Debt Securities, Held-to-maturity, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss | (31) | (52)
Debt Securities, Held-to-maturity, Continuous Unrealized Loss Position, 12 Months or Longer, Fair Value | 1,593 | 1,670
Debt Securities, Held-to-maturity, Unrealized Loss Position, Accumulated Loss | (31) | (52)
Debt Securities, Held-to-maturity, Unrealized Loss Position, Fair Value | 1,593 | 1,670
Mortgage-backed securities |  |
Debt Securities, Available-for-sale, Unrealized Loss Position [Line Items] |  |
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss | 0 | 0
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months | 0 | 0
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss | (5,643) | (6,147)
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer | 22,376 | 22,863
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss | (5,643) | (6,147)
Debt Securities, Available-for-sale, Unrealized Loss Position | 22,376 | 22,863
Schedule of Held-to-maturity Securities [Line Items] |  |
Debt Securities, Held-to-maturity, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss | 0 | 0
Debt Securities, Held-to-maturity, Continuous Unrealized Loss Position, Less than 12 Months, Fair Value | 0 | 0
Debt Securities, Held-to-maturity, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss | (31) | (52)
Debt Securities, Held-to-maturity, Continuous Unrealized Loss Position, 12 Months or Longer, Fair Value | 1,593 | 1,670
Debt Securities, Held-to-maturity, Unrealized Loss Position, Accumulated Loss | (31) | (52)
Debt Securities, Held-to-maturity, Unrealized Loss Position, Fair Value | 1,593 | 1,670
US Government Agency Securities |  |
Debt Securities, Available-for-sale, Unrealized Loss Position [Line Items] |  |
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss | (10) | (11)
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months | 2,256 | 3,467
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss | (4) | (5)
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer | 524 | 843
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss | (14) | (16)
Debt Securities, Available-for-sale, Unrealized Loss Position | 2,780 | 4,310
Corporate Bonds |  |
Debt Securities, Available-for-sale, Unrealized Loss Position [Line Items] |  |
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss | 0 | 0
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months | 0 | 0
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss | (2,376) | (2,442)
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer | 2,885 | 2,820
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss | (2,376) | (2,442)
Debt Securities, Available-for-sale, Unrealized Loss Position | 2,885 | 2,820
Municipal Securities |  |
Debt Securities, Available-for-sale, Unrealized Loss Position [Line Items] |  |
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss | 0 | 0
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months | 0 | 0
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss | (2,980) | (3,353)
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer | 14,682 | 14,320
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss | (2,980) | (3,353)
Debt Securities, Available-for-sale, Unrealized Loss Position | $ 14,682 | $ 14,320

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