Debt - Summary of Amounts Outstanding under the Credit Facility (Details) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2021	Dec. 31, 2020
Line of Credit Facility [Line Items]
Deferred financing costs on credit facility	$ 9,352	$ 6,656
Credit Facility | Revolving Credit Facility
Line of Credit Facility [Line Items]
Effective interest rate	1.13%
Letters of Credit Outstanding, Amount	$ 1,400	$ 1,500
Percentage of line of credit facility	0.15%	0.15%
Credit Facility | Revolving Credit Facility | Other assets, net
Line of Credit Facility [Line Items]
Deferred financing costs on credit facility	$ 5,400	$ 6,700
Credit Facility | Tranche A-1 Term Loan
Line of Credit Facility [Line Items]
Effective interest rate	2.59%
Debt, gross	$ 200,000	$ 200,000
Credit Facility | Tranche A-1 Term Loan | Interest rate swap
Line of Credit Facility [Line Items]
Weighted average interest rate	1.39%	1.39%
Credit Facility | Tranche A-2 Term Loan
Line of Credit Facility [Line Items]
Effective interest rate	2.49%
Debt, gross	$ 200,000	$ 200,000
Credit Facility | Tranche A-2 Term Loan | Interest rate swap
Line of Credit Facility [Line Items]
Weighted average interest rate	1.34%	1.34%
Credit Facility | Tranche A-1 and A-2 Loans
Line of Credit Facility [Line Items]
Debt, gross	$ 400,000	$ 400,000
Unamortized deferred financing costs, net	(1,507)	(2,021)
Long-term debt, net	$ 398,493	$ 397,979