Debt - Long-Term Debt (Details) - USD ($) $ in Thousands	Jun. 27, 2021	Dec. 31, 2020
Debt Instrument [Line Items]
Total debt	$ 892,799	$ 890,000
Other debt	5,024	0
Unamortized discount and debt issuance costs	(22,295)	(23,733)
Total debt, net of discount and debt issuance costs	870,504	866,267
Less current maturities of long-term debt	(6,611)	(5,961)
Total long-term debt, net of current	863,893	860,306
Secured Debt | First Term Loan
Debt Instrument [Line Items]
Total debt	$ 887,775	$ 890,000