Debt - Changes to Maximum Leverage Ratio (Details)	3 Months Ended			12 Months Ended
	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2020	Dec. 31, 2019
Debt Instrument [Line Items]
Maximum leverage ratio					4
Credit Agreement | Scenario, Forecast
Debt Instrument [Line Items]
Maximum leverage ratio				3.5
Amended And Restated Syndicated Facility Agreement
Debt Instrument [Line Items]
Maximum leverage ratio					4.00
Offering of Indebtedness | Credit Agreement | Scenario, Forecast
Debt Instrument [Line Items]
Maximum leverage ratio	3.75	3.75	3.75