Securities - Gross Unrealized Losses and Fair Value, Continuous Unrealized Loss Position (Details) $ in Thousands	Mar. 31, 2022 USD ($) security	Jun. 30, 2021 USD ($)
Debt Securities, Available-for-sale [Line Items]
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Fair Value	$ 123,602	$ 66,401
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Unrealized Losses	5,395	883
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or more, Fair Value	41,375	790
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or more, Unrealized Losses	3,745	258
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	164,977	67,191
Available-for-sale Securities, Continuous Unrealized Loss Position, Unrealized Losses	9,140	1,141
US States and Political Subdivisions Debt Securities
Debt Securities, Available-for-sale [Line Items]
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Fair Value	20,891	3,177
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Unrealized Losses	1,155	40
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or more, Fair Value	1,756
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or more, Unrealized Losses	191
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	22,647	3,177
Available-for-sale Securities, Continuous Unrealized Loss Position, Unrealized Losses	$ 1,346	40
Number of individual securities in an unrealized loss position for less than 12 months | security	37
Number of individual securities in an unrealized loss position for more than 12 months | security	3
Corporate Obligations
Debt Securities, Available-for-sale [Line Items]
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Fair Value	$ 10,723	9,331
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Unrealized Losses	145	79
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or more, Fair Value	6,096	720
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or more, Unrealized Losses	358	256
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	16,819	10,051
Available-for-sale Securities, Continuous Unrealized Loss Position, Unrealized Losses	$ 503	335
Number of individual securities in an unrealized loss position for less than 12 months | security	10
Number of individual securities in an unrealized loss position for more than 12 months | security	4
Other Debt Obligations
Debt Securities, Available-for-sale [Line Items]
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Fair Value	$ 445
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Unrealized Losses	17
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	445
Available-for-sale Securities, Continuous Unrealized Loss Position, Unrealized Losses	$ 17
Number of individual securities in an unrealized loss position for less than 12 months | security	1
Number of individual securities in an unrealized loss position for more than 12 months | security	0
Total MBS and CMOs
Debt Securities, Available-for-sale [Line Items]
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Fair Value	$ 91,543	53,893
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Unrealized Losses	4,078	764
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or more, Fair Value	33,523	70
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or more, Unrealized Losses	3,196	2
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	125,066	53,963
Available-for-sale Securities, Continuous Unrealized Loss Position, Unrealized Losses	$ 7,274	$ 766
Mortgage-Backed Securities
Debt Securities, Available-for-sale [Line Items]
Number of individual securities in an unrealized loss position for less than 12 months | security	61
Number of individual securities in an unrealized loss position for more than 12 months | security	16