OTHER COMPREHENSIVE INCOME - Balances and Changes in AOCI (Details) - USD ($) $ in Thousands	6 Months Ended		12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Jun. 30, 2024	Jun. 30, 2023
Accumulated other comprehensive loss
Balance at beginning of period	$ 296,528	$ 266,700	$ 266,700	$ 242,627
Balance at end of period	304,553		296,528	266,700
Accumulated Other Comprehensive Income (Loss)
Accumulated other comprehensive loss
Balance at beginning of period	4,942	(9,568)	(9,568)	(11,180)
Other comprehensive income before reclassifications	852	5,579	10,362	1,624
Amounts reclassified from accumulated other comprehensive income	(251)	4,170	4,148	(12)
Balance at end of period	5,543	181	4,942	(9,568)
Unrealized Gains/Losses on Securities
Accumulated other comprehensive loss
Balance at beginning of period	(2,734)	(13,702)	(13,702)	(10,872)
Other comprehensive income before reclassifications	496	5,579	6,798	(2,830)
Amounts reclassified from accumulated other comprehensive income	(122)	4,170	4,170
Balance at end of period	(2,360)	(3,953)	(2,734)	(13,702)
Defined benefit plans
Accumulated other comprehensive loss
Balance at beginning of period	7,676	4,134	4,134	(308)
Other comprehensive income before reclassifications	356		3,564	4,454
Amounts reclassified from accumulated other comprehensive income	(129)		(22)	(12)
Balance at end of period	$ 7,903	$ 4,134	$ 7,676	$ 4,134