OTHER COMPREHENSIVE LOSS - Balances and Changes in AOCI (Details) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2022	Jun. 30, 2021
Accumulated other comprehensive income (loss)
Balance at beginning of period	$ 237,822	$ 223,966
Balance at end of period	242,627	237,822
Accumulated Other Comprehensive Loss
Accumulated other comprehensive income (loss)
Balance at beginning of period	(5,125)	(17,370)
Other comprehensive loss before reclassifications	(6,273)	10,990
Amounts reclassified from accumulated other comprehensive income	218	1,255
Balance at end of period	(11,180)	(5,125)
Unrealized Gains/Losses on Securities
Accumulated other comprehensive income (loss)
Balance at beginning of period	164	380
Other comprehensive loss before reclassifications	(11,007)	(216)
Amounts reclassified from accumulated other comprehensive income	(29)
Balance at end of period	(10,872)	164
Defined benefit plans
Accumulated other comprehensive income (loss)
Balance at beginning of period	(5,289)	(17,750)
Other comprehensive loss before reclassifications	4,734	11,206
Amounts reclassified from accumulated other comprehensive income	247	1,255
Balance at end of period	$ (308)	$ (5,289)