OTHER COMPREHENSIVE INCOME (LOSS) - Balances and Changes in AOCI (Details) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2024	Jun. 30, 2023
Accumulated other comprehensive loss
Balance at beginning of period	$ 266,700	$ 242,627
Balance at end of period	296,528	266,700
Accumulated Other Comprehensive Loss
Accumulated other comprehensive loss
Balance at beginning of period	(9,568)	(11,180)
Other comprehensive income (loss) before reclassifications	10,362	1,624
Amounts reclassified from accumulated other comprehensive loss	4,148	(12)
Balance at end of period	4,942	(9,568)
Unrealized Gains/Losses on Securities
Accumulated other comprehensive loss
Balance at beginning of period	(13,702)	(10,872)
Other comprehensive income (loss) before reclassifications	6,798	(2,830)
Amounts reclassified from accumulated other comprehensive loss	4,170
Balance at end of period	(2,734)	(13,702)
Defined benefit plans
Accumulated other comprehensive loss
Balance at beginning of period	4,134	(308)
Other comprehensive income (loss) before reclassifications	3,564	4,454
Amounts reclassified from accumulated other comprehensive loss	(22)	(12)
Balance at end of period	$ 7,676	$ 4,134