Summary of Significant Accounting Policies (Details) - USD ($)		3 Months Ended		9 Months Ended
	Sep. 21, 2021	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense			$ 0	$ 124,259,000	$ 43,280,000
Allowance for doubtful accounts		$ 6,800,000		6,800,000		$ 6,400,000
Plan benefit obligation		6,200,000		6,200,000		$ 5,600,000
RSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense	$ 0	$ 124,259,000		$ 124,300,000