Investment Securities-Schedule of Unrealized Loss (Details) - USD ($) $ in Thousands	Sep. 30, 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	$ 1	$ 13
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	258	4,075
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	15,313	12,203
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	47,385	49,471
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	15,314	12,216
Debt Securities, Available-for-sale, Unrealized Loss Position	47,643	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	157	94
Debt Securities, Held-to-maturity, Continuous Unrealized Loss Position, 12 Months or Longer, Fair Value	1,971	1,822
Debt Securities, Held-to-maturity, Unrealized Loss Position, Accumulated Loss	157	97
Debt Securities, Held-to-maturity, Unrealized Loss Position, Fair Value	1,971	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	1	0
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	258	0
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	8,020	6,264
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	24,217	27,146
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	8,021	6,264
Debt Securities, Available-for-sale, Unrealized Loss Position	24,475	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	157	94
Debt Securities, Held-to-maturity, Continuous Unrealized Loss Position, 12 Months or Longer, Fair Value	1,971	1,822
Debt Securities, Held-to-maturity, Unrealized Loss Position, Accumulated Loss	157	97
Debt Securities, Held-to-maturity, Unrealized Loss Position, Fair Value	1,971	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	7,462	5,251
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	25	38
Debt Securities, Available-for-sale, Unrealized Loss Position	7,462	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	2,523	2,177
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	2,744	3,092
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	2,523	2,177
Debt Securities, Available-for-sale, Unrealized Loss Position	2,744	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	4,745	3,737
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	12,962	13,982
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	4,745	3,737
Debt Securities, Available-for-sale, Unrealized Loss Position	$ 12,962	$ 13,982