Investment Securities - Investments with unrealized losses (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Jun. 30, 2021
Fair Value
Less than 12 Months	$ 71,765	$ 78,409
12 Months or More	26,792	2,407
Total Fair Value	98,557	80,816
Unrealized Losses
Less than 12 Months	(1,312)	(1,021)
12 Months or More	(982)	(53)
Total Unrealized Losses	(2,294)	(1,074)
Fair Value
Less than 12 Months	101,806
Total Fair Value	101,806
Unrealized Losses
Less than 12 Months	(1,077)
Total Unrealized Losses	(1,077)
Less than 12 Months Fair Value	173,571
12 Months or More Fair Value	26,792
Total Fair Value	200,363
Less than 12 Months Unrealized Losses	(2,389)
12 Months or More Unrealized Losses	(982)
Total Unrealized Losses	(3,371)
Mortgage-backed securities
Fair Value
Less than 12 Months	46,809	43,152
12 Months or More	6,688
Total Fair Value	53,497	43,152
Unrealized Losses
Less than 12 Months	(613)	(374)
12 Months or More	(253)
Total Unrealized Losses	(866)	(374)
Fair Value
Less than 12 Months	101,806
Total Fair Value	101,806
Unrealized Losses
Less than 12 Months	(1,077)
Total Unrealized Losses	(1,077)
U.S. agency collateralized mortgage obligations
Fair Value
Less than 12 Months	3,616	10,613
12 Months or More	7,344	2,407
Total Fair Value	10,960	13,020
Unrealized Losses
Less than 12 Months	(162)	(202)
12 Months or More	(333)	(53)
Total Unrealized Losses	(495)	(255)
U.S. government agency securities
Fair Value
Less than 12 Months	1,385	6,896
12 Months or More	4,607
Total Fair Value	5,992	6,896
Unrealized Losses
Less than 12 Months	(3)	(56)
12 Months or More	(51)
Total Unrealized Losses	(54)	(56)
Municipal bonds
Fair Value
Less than 12 Months	10,766	17,748
12 Months or More	8,153
Total Fair Value	18,919	17,748
Unrealized Losses
Less than 12 Months	(423)	(389)
12 Months or More	(345)
Total Unrealized Losses	(768)	$ (389)
Corporate bonds
Fair Value
Less than 12 Months	9,189
Total Fair Value	9,189
Unrealized Losses
Less than 12 Months	(111)
Total Unrealized Losses	$ (111)