DEBT (Long-term debt) (Detail) - USD ($) $ in Thousands	Dec. 31, 2018	Jun. 30, 2018	Dec. 31, 2017
Total Debt:
Long-term Debt, Gross	$ 298,500	$ 300,000	$ 165,000
Deferred Debt Issuance Costs	(6,416)	(6,927)	0
Total Amount Outstanding	292,084	293,073	165,000
Less Current Portion:
Term B Loan	(3,000)	(3,000)	0
Noncurrent Portion	289,084	290,073	165,000
Revolver [Member]
Total Debt:
Long-term Debt, Gross	0	0	165,000
Term B Loan [Member]
Total Debt:
Long-term Debt, Gross	$ 298,500	$ 300,000	$ 0