INCOME TAXES - Changes in Valuation Allowances (Details) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2020
Valuation Allowance [Roll Forward]
Balance at beginning of year	$ 37,453	$ 41,941
Balance at end of year	36,891	37,453	$ 41,941
Reductions credited to income tax expense
Valuation Allowance [Roll Forward]
Charged to costs and expenses	(1,004)	(11,520)
Currency translation adjustments
Valuation Allowance [Roll Forward]
Charged to costs and expenses	(2,085)	1,431
Additions charged to income tax expense
Valuation Allowance [Roll Forward]
Charged to costs and expenses	784	5,601
THWR purchase accounting
Valuation Allowance [Roll Forward]
Charged to costs and expenses	$ 1,743	$ 0	$ 0