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Investment Securities-Schedule of Unrealized Loss (Details) - USD ($) $ in Thousands	Sep. 30, 2025	Mar. 31, 2025
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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