DEBT (Details) - USD ($) $ in Thousands		12 Months Ended
	Jun. 17, 2019	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2012
Long-term debt disclosure
Principal		$ 220,000	$ 370,000
Unamortized Discount			(12,764)
Debt Issuance Costs		(5,446)	(6,209)
Total debt		214,554	351,027
Repayment of debt		370,000	250,000	$ 95,000
2019 Notes
Long-term debt disclosure
Principal			370,000
Unamortized Discount			(12,764)
Debt Issuance Costs			(1,316)
Total debt			355,920
Principal amount of debt issued					$ 370,000
Interest rate on convertible senior notes (as a percent)					2.875%
Repayment of debt	$ 370,000
Interest expense recognized		24,300	24,500	23,600
Credit Facility
Long-term debt disclosure
Principal		220,000
Debt Issuance Costs		(5,446)	(4,893)
Total debt		214,554
Interest expense recognized		1,700	5,700	$ 9,900
Maximum availability under the revolving credit facility		780,000
Outstanding amount under credit facility		$ 220,000	$ 0
Effective interest rate (as percent)		3.65%
LIBOR | Credit Facility
Long-term debt disclosure
Effective interest rate (as percent)		1.20%