Debt (Narratives) (Details) - USD ($)		3 Months Ended		6 Months Ended
	Aug. 09, 2019	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2019	Dec. 31, 2018
Line Of Credit Facility [Line Items]
Outstanding letters of credit		$ 7,700,000		$ 7,700,000
Interest Expense
Line Of Credit Facility [Line Items]
Amortization of deferred financing costs		700,000	$ 200,000	1,100,000	$ 300,000
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				5.00%
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
Borrowings available under facility		$ 60,300,000		$ 60,300,000
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%