Long-Term Debt - Net (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Jun. 30, 2017
Long-term debt
Debt, gross	$ 913,998
Other		$ 735
Total debt, net	851,534	903,647
Less short-term borrowings and current portion of long-term debt	(66,845)	(60,117)
Total long-term debt, net	784,689	843,530
Voluntary payment against long-term debt	25,000
Write-off related to debt issuance costs	2,600
Term Loan A due 2020
Long-term debt
Debt, gross	234,151	254,375
Unamortized discount and other debt issuance costs	(11,457)	(16,238)
Total debt, net	222,694	238,137
Term Loan B due 2022
Long-term debt
Debt, gross	679,847	727,881
Unamortized discount and other debt issuance costs	(51,007)	(63,106)
Total debt, net	$ 628,840	$ 664,775