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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% |  |  |  |

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