OTHER COMPREHENSIVE INCOME (LOSS) - Balances and Changes in AOCI (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2020	Mar. 31, 2019
Accumulated other comprehensive income (loss)
Balance at beginning of period	$ 227,982	$ 126,394	$ 134,965	$ 118,063
Balance at end of period	228,532	131,763	228,532	131,763
Accumulated Other Comprehensive Loss
Accumulated other comprehensive income (loss)
Balance at beginning of period	(11,452)	(9,901)	(11,103)	(8,989)
Other comprehensive income (loss) before reclassifications	(412)	590	(124)	(322)
Amounts reclassified from accumulated other comprehensive income (loss)	(61)		(99)
Reclassification for change in accounting principle			(599)
Balance at end of period	(11,925)	(9,311)	(11,925)	(9,311)
Unrealized Gains/Losses on Securities
Accumulated other comprehensive income (loss)
Balance at beginning of period	(11)	(502)	338	410
Other comprehensive income (loss) before reclassifications	(412)	590	(124)	(322)
Amounts reclassified from accumulated other comprehensive income (loss)	(61)		(99)
Reclassification for change in accounting principle			(599)
Balance at end of period	(484)	88	(484)	88
Defined Benefit Plan
Accumulated other comprehensive income (loss)
Balance at beginning of period	(11,441)	(9,399)	(11,441)	(9,399)
Balance at end of period	$ (11,441)	$ (9,399)	$ (11,441)	$ (9,399)