Credit Agreement (Details) - USD ($) $ in Thousands	Dec. 23, 2019	Dec. 31, 2021	Jun. 30, 2021
Secured Debt [Member]
Credit Agreement
Principal amount	$ 320,000	$ 288,000
Effective interest rate (as a percent)		1.60%
Non-current borrowings, net		$ 264,000	$ 276,000
Principal amount		288,000
Debt issuance costs		2,800	2,800
Short-term Debt		$ 24,000	20,000
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		$ 261,177	$ 273,162
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