Pension Benefits - Net Periodic Pension Cost, AOCI (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 02, 2022	Jul. 03, 2021	Jul. 02, 2022	Jul. 03, 2021
Components of net periodic pension cost
Service cost-benefits earned during the period	$ 2,192	$ 2,603	$ 4,488	$ 5,229
Interest cost on projected benefit obligation	1,365	1,208	2,736	2,433
Expected return on plan assets	(3,236)	(2,727)	(6,473)	(5,484)
Amortization of unrecognized loss	26	403	54	845
Net periodic pension cost	347	$ 1,487	805	$ 3,023
Contributions made for the remainder	$ 2,500		$ 2,500