Benefit Plans - Components of Net Periodic Postretirement Benefit Cost (Details) - Postretirement Benefits - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 29, 2019
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 1,516	$ 1,454	$ 1,496
Interest cost	1,772	2,031	2,750
Recognized net actuarial loss	682	383	730
Amortization of prior service cost	0	0	(1,293)
Net periodic pension/postretirement benefit cost	$ 3,970	$ 3,868	$ 3,683