Investment Securities - Investments with unrealized losses (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Jun. 30, 2022
Fair Value
Less than 12 Months	$ 93,164	$ 129,754
12 Months or More	68,535	30,274
Total Fair Value	161,699	160,028
Unrealized Losses
Less than 12 Months	(11,962)	(14,287)
12 Months or More	(17,121)	(5,769)
Total Unrealized Losses	(29,083)	(20,056)
Fair Value
Less than 12 Months	7,163	88,321
12 Months or More	78,281
Total Fair Value	85,444	88,321
Unrealized Losses
Less than 12 Months	(548)	(13,814)
12 Months or More	(16,978)
Total Unrealized Losses	(17,526)	(13,814)
Less than 12 Months Fair Value	100,327	218,075
12 Months or More Fair Value	146,816	30,274
Total Fair Value	247,143	248,349
Less than 12 Months Unrealized Losses	(12,510)	(28,101)
12 Months or More Unrealized Losses	(34,099)	(5,769)
Total Unrealized Losses	(46,609)	(33,870)
Mortgage-backed securities
Fair Value
Less than 12 Months	66,449	93,726
12 Months or More	40,433	13,750
Total Fair Value	106,882	107,476
Unrealized Losses
Less than 12 Months	(9,083)	(10,351)
12 Months or More	(9,102)	(2,374)
Total Unrealized Losses	(18,185)	(12,725)
Fair Value
Less than 12 Months	2,282	88,321
12 Months or More	78,281
Total Fair Value	80,563	88,321
Unrealized Losses
Less than 12 Months	(461)	(13,814)
12 Months or More	(16,978)
Total Unrealized Losses	(17,439)	(13,814)
U.S. agency collateralized mortgage obligations
Fair Value
Less than 12 Months	1,176	2,968
12 Months or More	7,486	6,741
Total Fair Value	8,662	9,709
Unrealized Losses
Less than 12 Months	(257)	(488)
12 Months or More	(1,496)	(804)
Total Unrealized Losses	(1,753)	(1,292)
U.S. government agency securities
Fair Value
Less than 12 Months		61
12 Months or More	1,138	1,556
Total Fair Value	1,138	1,617
Unrealized Losses
Less than 12 Months		(3)
12 Months or More	(92)	(52)
Total Unrealized Losses	(92)	(55)
Fair Value
Less than 12 Months	4,881
Total Fair Value	4,881
Unrealized Losses
Less than 12 Months	(87)
Total Unrealized Losses	(87)
Municipal bonds
Fair Value
Less than 12 Months	376	7,415
12 Months or More	14,005	8,227
Total Fair Value	14,381	15,642
Unrealized Losses
Less than 12 Months	(135)	(1,979)
12 Months or More	(5,604)	(2,539)
Total Unrealized Losses	(5,739)	(4,518)
Corporate bonds
Fair Value
Less than 12 Months	25,163	25,584
12 Months or More	5,473
Total Fair Value	30,636	25,584
Unrealized Losses
Less than 12 Months	(2,487)	(1,466)
12 Months or More	(827)
Total Unrealized Losses	$ (3,314)	$ (1,466)