Commitments and Contingencies - Revolving Credit Facility (Details)	1 Months Ended
	Sep. 30, 2019 USD ($)
Line of Credit
Line of Credit Facility [Line Items]
Line of credit facility, current borrowing capacity	$ 500,000,000.0
Line of credit facility, additional borrowing capacity	500,000,000.0
Debt covenant, minimum consolidated EBITDA	2.50
Letter of Credit
Line of Credit Facility [Line Items]
Line of credit facility, additional borrowing capacity	$ 50,000,000.0
Minimum | Line of Credit
Line of Credit Facility [Line Items]
Debt covenant, consolidated leverage ratio	3.50
Minimum | Base Rate | Line of Credit
Line of Credit Facility [Line Items]
Interest rate (percent)	0.125%
Minimum | Eurodollar | Line of Credit
Line of Credit Facility [Line Items]
Interest rate (percent)	1.125%
Maximum | Line of Credit
Line of Credit Facility [Line Items]
Debt covenant, consolidated leverage ratio	4.00
Maximum | Base Rate | Line of Credit
Line of Credit Facility [Line Items]
Interest rate (percent)	0.50%
Maximum | Eurodollar | Line of Credit
Line of Credit Facility [Line Items]
Interest rate (percent)	1.50%