Debt (Narratives) (Details) - USD ($)		3 Months Ended		9 Months Ended
	Aug. 09, 2019	Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2020	Mar. 31, 2019	May 08, 2020	Apr. 30, 2020
Line Of Credit Facility [Line Items]
Outstanding letters of credit		$ 7,700,000		$ 7,700,000
Subsequent Event
Line Of Credit Facility [Line Items]
Euro dollar rate							4.50%
Interest Expense
Line Of Credit Facility [Line Items]
Amortization of deferred financing costs		600,000	$ 200,000	1,800,000	$ 500,000
2019 Credit Agreement
Line Of Credit Facility [Line Items]
Amortization of deferred financing costs	$ 1,600,000
Deferred financing cost		$ 10,500,000		$ 10,500,000
Debt instrument interest rate				5.10%
2019 Credit Agreement | First Amendment
Line Of Credit Facility [Line Items]
Amendment start date		Apr. 08, 2020
2019 Credit Agreement | Second Amendment
Line Of Credit Facility [Line Items]
Amendment start date		May 08, 2020
2019 Credit Agreement | Term Loan
Line Of Credit Facility [Line Items]
Credit Facility, term	5 years
Borrowing capacity from Credit Agreement	$ 380,000,000
2019 Credit Agreement | Revolving Facility
Line Of Credit Facility [Line Items]
Credit Facility, term	5 years
Borrowing capacity from Credit Agreement	$ 75,000,000
2019 Credit Agreement | Revolving Facility | Subsequent Event
Line Of Credit Facility [Line Items]
Borrowings available under facility						$ 55,000,000.0
Initial Term Loan | Applicable Margin for Eurodollar
Line Of Credit Facility [Line Items]
Base rate	0.00%
Initial Term Loan | Revolving Facility
Line Of Credit Facility [Line Items]
Commitment fee	0.35%
Maximum | 2019 Credit Agreement
Line Of Credit Facility [Line Items]
Additional incremental loan facility that may be requested	$ 100,000,000
Maximum | Initial Term Loan | Applicable Margin for Eurodollar
Line Of Credit Facility [Line Items]
Borrowings, interest rate	3.50%
Maximum | Initial Term Loan | Applicable Margin for Base Rate
Line Of Credit Facility [Line Items]
Borrowings, interest rate	2.50%
Maximum | Initial Term Loan | Revolving Facility
Line Of Credit Facility [Line Items]
Commitment fee	0.40%
Minimum | Initial Term Loan | Applicable Margin for Eurodollar
Line Of Credit Facility [Line Items]
Borrowings, interest rate	1.25%
Minimum | Initial Term Loan | Applicable Margin for Base Rate
Line Of Credit Facility [Line Items]
Borrowings, interest rate	0.25%
Minimum | Initial Term Loan | Revolving Facility
Line Of Credit Facility [Line Items]
Commitment fee	0.25%