Debt - Summary of Total Debt (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020	Aug. 21, 2018
Debt Instrument [Line Items]
Total debt	$ 1,074,320	$ 1,155,007
Debt issuance costs	(13,578)	(17,103)
Less: current portion of term loans	40,967	34,265
Less: current portion of debt issuance costs	(4,596)	(4,685)
Total long-term debt	1,033,353	1,120,742
Term Loans
Debt Instrument [Line Items]
Total debt	687,898	717,110
Less: current portion of term loans	45,563	38,950
Line of Credit \| Revolving Credit Facility
Debt Instrument [Line Items]
Total debt	0	55,000
Senior Notes \| 5.750% Senior notes, due August 2026
Debt Instrument [Line Items]
Stated interest rate (percentage)			5.75%
Total debt	$ 400,000	$ 400,000

Contractual interest rate for funds borrowed, under the debt agreement.

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