Investment Securities-Schedule of Unrealized Loss (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Mar. 31, 2023
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	$ (13)
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	0	4,075
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	(12,281)	(12,203)
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	47,519	49,471
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	(12,281)	(12,216)
Debt Securities, Available-for-sale, Unrealized Loss Position	47,519	53,546
Schedule of Held-to-maturity Securities [Line Items]
Debt Securities, Held-to-maturity, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	0	(3)
Debt Securities, Held-to-maturity, Continuous Unrealized Loss Position, Less than 12 Months, Fair Value	0	363
Debt Securities, Held-to-maturity, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	(94)	(94)
Debt Securities, Held-to-maturity, Continuous Unrealized Loss Position, 12 Months or Longer, Fair Value	1,950	1,822
Debt Securities, Held-to-maturity, Unrealized Loss Position, Accumulated Loss	(94)	(97)
Debt Securities, Held-to-maturity, Unrealized Loss Position, Fair Value	1,950	2,185
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	(6,471)	(6,264)
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	25,260	27,146
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	(6,471)	(6,264)
Debt Securities, Available-for-sale, Unrealized Loss Position	25,260	27,146
Schedule of Held-to-maturity Securities [Line Items]
Debt Securities, Held-to-maturity, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	0	(3)
Debt Securities, Held-to-maturity, Continuous Unrealized Loss Position, Less than 12 Months, Fair Value	0	363
Debt Securities, Held-to-maturity, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	(94)	(94)
Debt Securities, Held-to-maturity, Continuous Unrealized Loss Position, 12 Months or Longer, Fair Value	1,950	1,822
Debt Securities, Held-to-maturity, Unrealized Loss Position, Accumulated Loss	(94)	(97)
Debt Securities, Held-to-maturity, Unrealized Loss Position, Fair Value	1,950	2,185
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	0	(13)
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	0	4,075
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	(25)	(25)
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	5,076	5,251
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	(25)	(38)
Debt Securities, Available-for-sale, Unrealized Loss Position	5,076	9,326
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	(2,074)	(2,177)
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	3,192	3,092
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	(2,074)	(2,177)
Debt Securities, Available-for-sale, Unrealized Loss Position	3,192	3,092
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	(3,711)	(3,737)
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	13,991	13,982
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	(3,711)	(3,737)
Debt Securities, Available-for-sale, Unrealized Loss Position	$ 13,991	$ 13,982