Commitments and Contingencies (Details) - USD ($)	3 Months Ended
	Mar. 31, 2020	Sep. 30, 2019
Line of Credit Facility [Line Items]
Indemnification claims	$ 0
Revolving Credit Facility
Line of Credit Facility [Line Items]
Line of credit facility, maximum borrowing capacity		$ 500,000,000.0
Line of credit facility additional borrowing capacity		500,000,000.0
Debt covenant, consolidated leverage ratio	3.50
Debt covenant, increase in consolidated leverage ratio	4.00
Debt covenant, interest coverage ratio	2.50
Revolving Credit Facility | Base Rate | Minimum
Line of Credit Facility [Line Items]
Basis spread on variable rate	0.125%
Revolving Credit Facility | Base Rate | Maximum
Line of Credit Facility [Line Items]
Basis spread on variable rate	0.50%
Revolving Credit Facility | Eurodollar | Minimum
Line of Credit Facility [Line Items]
Basis spread on variable rate	1.125%
Revolving Credit Facility | Eurodollar | Maximum
Line of Credit Facility [Line Items]
Basis spread on variable rate	1.50%
Letters of Credit
Line of Credit Facility [Line Items]
Line of credit facility, maximum borrowing capacity		$ 50,000,000.0