DEBT (Long-term debt) (Detail) - USD ($) $ in Thousands	Mar. 31, 2019	Jun. 30, 2018	Mar. 31, 2018
Total Debt:
Long-term Debt, Gross	$ 297,750	$ 300,000	$ 120,000
Deferred Debt Issuance Costs	(6,161)	(6,927)	0
Total Amount Outstanding	291,589	293,073	120,000
Less Current Portion:
Term B Loan	(3,000)	(3,000)	0
Noncurrent Portion	288,589	290,073	120,000
Revolver [Member]
Total Debt:
Long-term Debt, Gross	0	0	120,000
Term B Loan [Member]
Total Debt:
Long-term Debt, Gross	$ 297,750	$ 300,000	$ 0