SUPPLEMENTAL CASH FLOW INFORMATION (Details) - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
	Dec. 31, 2021	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2019
Cash paid during the period for:
Interest	$ 304	$ 3,510	$ 4,900	$ 10,638
Income taxes, net of refunds	24,166	58,970	31,555	44,435
Non-cash investing and financing activities:
Dividends declared	$ 42,659	$ 77,416	$ 72,463	$ 68,473