Employee Benefit and Pension Plans - Additional Information (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 28, 2019	Dec. 29, 2018	Dec. 30, 2017
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Postretirement costs		$ 3.9
Forecast [Member]
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Pension expense	$ 3.5
401(k) Plan
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Cash contribution		2.7	$ 2.3	$ 2.2
ITP Pension Plan | Transmode
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Pension expense		$ 2.6	$ 2.8	$ 3.3