Investment Securities - Investments with unrealized losses (Details) - USD ($) $ in Thousands	Sep. 30, 2022	Jun. 30, 2022
Fair Value
Less than 12 Months	$ 103,582	$ 129,754
12 Months or More	58,823	30,274
Total Fair Value	162,405	160,028
Unrealized Losses
Less than 12 Months	(14,362)	(14,287)
12 Months or More	(15,676)	(5,769)
Total Unrealized Losses	(30,038)	(20,056)
Fair Value
Less than 12 Months	58,582	88,321
12 Months or More	26,415
Total Fair Value	84,997	88,321
Unrealized Losses
Less than 12 Months	(12,811)	(13,814)
12 Months or More	(6,568)
Total Unrealized Losses	(19,379)	(13,814)
Less than 12 Months Fair Value	162,164	218,075
12 Months or More Fair Value	85,238	30,274
Total Fair Value	247,402	248,349
Less than 12 Months Unrealized Losses	(27,173)	(28,101)
12 Months or More Unrealized Losses	(22,244)	(5,769)
Total Unrealized Losses	(49,417)	(33,870)
Mortgage-backed securities
Fair Value
Less than 12 Months	73,334	93,726
12 Months or More	34,153	13,750
Total Fair Value	107,487	107,476
Unrealized Losses
Less than 12 Months	(11,368)	(10,351)
12 Months or More	(8,366)	(2,374)
Total Unrealized Losses	(19,734)	(12,725)
Fair Value
Less than 12 Months	54,170	88,321
12 Months or More	26,415
Total Fair Value	80,585	88,321
Unrealized Losses
Less than 12 Months	(12,738)	(13,814)
12 Months or More	(6,568)
Total Unrealized Losses	(19,306)	(13,814)
U.S. agency collateralized mortgage obligations
Fair Value
Less than 12 Months	1,334	2,968
12 Months or More	7,612	6,741
Total Fair Value	8,946	9,709
Unrealized Losses
Less than 12 Months	(282)	(488)
12 Months or More	(1,432)	(804)
Total Unrealized Losses	(1,714)	(1,292)
U.S. government agency securities
Fair Value
Less than 12 Months	61	61
12 Months or More	1,224	1,556
Total Fair Value	1,285	1,617
Unrealized Losses
Less than 12 Months	(3)	(3)
12 Months or More	(83)	(52)
Total Unrealized Losses	(86)	(55)
Fair Value
Less than 12 Months	4,412
Total Fair Value	4,412
Unrealized Losses
Less than 12 Months	(73)
Total Unrealized Losses	(73)
Municipal bonds
Fair Value
Less than 12 Months	393	7,415
12 Months or More	14,049	8,227
Total Fair Value	14,442	15,642
Unrealized Losses
Less than 12 Months	(119)	(1,979)
12 Months or More	(5,580)	(2,539)
Total Unrealized Losses	(5,699)	(4,518)
Corporate bonds
Fair Value
Less than 12 Months	28,460	25,584
12 Months or More	1,785
Total Fair Value	30,245	25,584
Unrealized Losses
Less than 12 Months	(2,590)	(1,466)
12 Months or More	(215)
Total Unrealized Losses	$ (2,805)	$ (1,466)