Debt (Long-term debt) (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Jun. 30, 2021	Mar. 31, 2021
Total Debt:
Long-term Debt, Gross	$ 1,253,333	$ 1,091,000	$ 1,091,750
Unamortized debt issuance costs	(27,973)	(20,289)	(21,186)
Total Amount Outstanding	1,225,360	1,070,711	1,070,564
Less Current Portion:
Current Portion	0	(3,000)	(3,000)
Noncurrent Portion	1,225,360	1,067,711	1,067,564
Senior Secured Notes Due 2028 [Member]
Total Debt:
Long-term Debt, Gross	800,000	800,000	800,000
Term B Loan [Member]
Total Debt:
Long-term Debt, Gross	453,333	0	0
Prior Term Loan B [Member]
Total Debt:
Long-term Debt, Gross	0	291,000	291,750
Less Current Portion:
Current Portion	$ 0	$ (3,000)	$ (3,000)