Credit Agreement (Details) - USD ($) $ in Thousands		9 Months Ended
	Dec. 23, 2019	Mar. 31, 2020	Mar. 31, 2019	Jun. 30, 2019
Credit Agreement
Debt issuance costs		$ 3,800
Short-term Debt		135,163		$ 220,000
Proceeds from borrowings		$ 215,163	$ 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		$ 296,167		$ 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
Short-term Debt		119,200
Line of Credit Facility, Fair Value of Amount Outstanding		$ 119,200
Outstanding Borrowing 3 [Member] | Revolving Credit Facility [Member]
Credit Agreement
Effective interest rate (as a percent)		2.43%
Line of Credit Facility, Fair Value of Amount Outstanding		$ 19,200
Outstanding Borrowing 2 [Member] | Revolving Credit Facility [Member]
Credit Agreement
Effective interest rate (as a percent)		2.46%
Line of Credit Facility, Fair Value of Amount Outstanding		$ 100,000
Secured Debt [Member]
Credit Agreement
Principal amount	$ 320,000	316,000
Short-term Debt		$ 16,000
Effective interest rate (as a percent)		2.43%
Non-current borrowings, net		$ 300,000