Credit Agreement (Details) - USD ($) $ in Thousands		6 Months Ended
	Dec. 23, 2019	Dec. 31, 2019	Dec. 31, 2018	Jun. 30, 2019
Credit Agreement
Principal amount	$ 520,000
Debt Issuance Costs, Line of Credit Arrangements, Net		$ 4,000
Amount outstanding		45,163		$ 220,000
Proceeds from borrowings		$ 129,163	$ 50,000
Variable rate spread (as a percent)	0.50%
Margin rate (as a percent)	0.50%
Maximum leverage ratio		3.50
Minimum interest coverage ratio		2.50
Non-current borrowings, net		$ 299,965		$ 0
Adjusted LIBOR
Credit Agreement
Variable rate spread (as a percent)	1.00%
Margin rate (as a percent)	1.50%
Revolving Credit Facility [Member]
Credit Agreement
Principal amount	$ 200,000
Amount outstanding		29,200
Line of Credit Facility, Fair Value of Amount Outstanding		$ 29,200
Outstanding Borrowing 1 [Member]
Credit Agreement
Effective interest rate (as a percent)		3.43%
Outstanding Borrowing 2 [Member]
Credit Agreement
Effective interest rate (as a percent)		3.29%
Secured Debt [Member]
Credit Agreement
Principal amount	$ 320,000	$ 320,000
Amount outstanding		16,000
Non-current borrowings, net		$ 304,000