Available for Sale Securities - Gross Unrealized Losses and Fair Value, Continuous Unrealized Loss Position (Details) $ in Thousands	Jun. 30, 2021 USD ($) security	Jun. 30, 2020 USD ($) security
Available-for-sale Securities
Debt Securities, Available-for-sale [Line Items]
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	$ 66,401	$ 10,032
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	883	44
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	790	643
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	258	338
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	67,191	10,675
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss	1,141	$ 382
Obligations of states and political subdivisions
Debt Securities, Available-for-sale [Line Items]
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	3,177
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	40
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	3,177
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss	$ 40
Number of individual securities in an unrealized loss position | security	7	7
Corporate Obligations
Debt Securities, Available-for-sale [Line Items]
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	$ 9,331	$ 995
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	79	5
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	720	454
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	256	333
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	10,051	1,449
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss	$ 335	$ 338
Number of individual securities in an unrealized loss position | security	7	7
Other securities
Debt Securities, Available-for-sale [Line Items]
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value		$ 189
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss		5
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value		189
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss		5
TOTAL MBS and CMOs
Debt Securities, Available-for-sale [Line Items]
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	$ 53,893	9,037
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	764	39
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	70
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	2
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	53,963	9,037
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss	$ 766	$ 39
Mortgage-Backed Securities
Debt Securities, Available-for-sale [Line Items]
Number of individual securities in an unrealized loss position | security	22	22