Investment Securities Investment Securities-Schedule of Unrealized Loss (Details) - USD ($) $ in Thousands	Jun. 30, 2021	Mar. 31, 2021
Debt Securities, Available-for-sale [Line Items]
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	$ 1,247	$ 3,217
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	50,936	60,110
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	101	113
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	20,704	18,631
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss	1,348	3,330
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	71,640	78,741
Mortgage-backed securities
Debt Securities, Available-for-sale [Line Items]
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	818	1,271
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	38,490	39,020
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	0	0
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	0	0
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss	818	1,271
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	38,490	39,020
US Government Agency Securities
Debt Securities, Available-for-sale [Line Items]
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	0	0
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	0	0
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	83	113
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	17,799	18,631
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss	83	113
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	17,799	18,631
Corporate Bonds
Debt Securities, Available-for-sale [Line Items]
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	251	793
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	5,022	4,481
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	0	0
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	0	0
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss	251	793
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	5,022	4,481
Municipal Securities
Debt Securities, Available-for-sale [Line Items]
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	178	1,153
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	7,424	16,609
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	18
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	2,905
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss	196	1,153
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	$ 10,329	$ 16,609