DEBT (Details) $ in Thousands		12 Months Ended
	Jun. 02, 2017 USD ($)	Jun. 30, 2017 USD ($)	Jun. 30, 2016 USD ($)	Jun. 30, 2015 USD ($)	Jun. 01, 2017 USD ($)	Jun. 30, 2012 USD ($)
Long-term debt disclosure
Principal		$ 620,000	$ 645,000
Unamortized Discount		(25,251)	(36,943)
Debt Issuance Costs		(8,579)	(7,372)
Total debt		586,170	600,685
Repayment of revolving credit facility		95,000	75,000
Borrowings from revolving credit facility		70,000	350,000
2019 Notes
Long-term debt disclosure
Principal		370,000	370,000
Unamortized Discount		(25,251)	(36,943)
Debt Issuance Costs		(2,646)	(3,934)
Total debt		342,103	329,123
Principal amount of debt issued						$ 370,000
Interest rate on convertible senior notes (as a percent)						2.875%
Interest expense recognized		23,600	22,800	$ 22,100
Credit Facility
Long-term debt disclosure
Principal		250,000	275,000
Debt Issuance Costs		(5,933)	(3,438)
Total debt		244,067	271,562
Interest expense recognized		9,900	$ 8,100	$ 600
Maximum availability under the revolving credit facility	$ 1,000,000				$ 650,000
Debt term	5 years
Repayment of revolving credit facility	$ 50,000
Borrowings from revolving credit facility	250,000
Available under the revolving credit facility		$ 750,000
Increase in debt	350,000
Amount of accordion feature	250,000
Maximum availability including accordion	$ 1,250,000
Basis spread on interest rate (as a percent)		1.75%
Interest coverage ratio, minimum	3.0
Leverage ratio, maximum	3.5
Maximum leverage ratio after material permitted acquisition	4.0
Period leverage ratio increases after material permitted acquisition	2 months
Material permitted acquisition threshold	$ 250,000
Effective interest rate (as percent)		2.97%
Federal Funds Effective Rate | Credit Facility
Long-term debt disclosure
Basis spread on interest rate (as a percent)	0.50%
LIBOR One Month | Credit Facility
Long-term debt disclosure
Basis spread on interest rate (as a percent)	1.00%
Minimum | Credit Facility
Long-term debt disclosure
Commitment fee (as a percent)	0.25%
Minimum | LIBOR | Credit Facility
Long-term debt disclosure
Basis spread on interest rate (as a percent)	1.25%
Minimum | Base Rate | Credit Facility
Long-term debt disclosure
Basis spread on interest rate (as a percent)	0.25%
Maximum | Credit Facility
Long-term debt disclosure
Commitment fee (as a percent)	0.55%
Maximum | LIBOR | Credit Facility
Long-term debt disclosure
Basis spread on interest rate (as a percent)	2.75%
Maximum | Base Rate | Credit Facility
Long-term debt disclosure
Basis spread on interest rate (as a percent)	1.75%