Debt (Details Textual)	12 Months Ended
	Jun. 30, 2020 USD ($) Rate	Jun. 30, 2019 USD ($)
Debt (Textual) [Abstract]
Senior secured revolving credit facility | $	$ 300,000,000	$ 300,000,000
Line of Credit Facility, Expiration Date	Feb. 08, 2022
Sublimit on Australian Dollars, Canadian Dollars, Euros and Pounds Sterling and letters of credit in Australian Dollars, Euros, and Pounds Sterling | $	$ 75.0
Sublimit for total letters of credit under the credit facility | $	$ 200.0
Additional Margin on alternate base rate loans, Minimum	0.625%
Additional Margin on alternate base rate loans, Maximum	1.625%
Line Of Credit Basis Spread On Adjusted LIBO, EURIBO and CDOR Minimum	1.625%
Line Of Credit Basis Spread On Adjusted LIBO, EURIBO and CDOR Maximum	2.625%
Line Of Credit Basis Spread On Canadian Prime Rate Minimum	2.125%
Line Of Credit Basis Spread On Canadian Prime Rate Maximum	3.125%
Leverage Ratio, Maximum	3.00
Leverage Ratio, Minimum	1.00
Fixed Charge Coverage Ratio, Maximum	1.25
Fixed Charge Coverage Ratio, Minimum	1.00
Limit on asset dispositions | $	$ 20.0
Minimum [Member]
Debt (Textual) [Abstract]
Unused Credit Facility Fee	0.25%
Maximum [Member]
Debt (Textual) [Abstract]
Unused Credit Facility Fee	0.45%