Impairment and Restructuring Charges - Restructuring Accrual (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 28, 2020	Mar. 30, 2019
Restructuring Reserve
Beginning Accrual Balance	$ 7,043	$ 8,640
Additions Charged to Expense	2,291	2,085
Payments or Utilization	(3,606)	(4,414)
Ending Accrual Balance	5,728	6,311
Severance costs
Restructuring Reserve
Beginning Accrual Balance	5,314	5,353
Additions Charged to Expense	1,892	1,878
Payments or Utilization	(3,450)	(4,003)
Ending Accrual Balance	3,756	3,228
Other exit costs
Restructuring Reserve
Beginning Accrual Balance	1,729	3,287
Additions Charged to Expense	399	207
Payments or Utilization	(156)	(411)
Ending Accrual Balance	$ 1,972	$ 3,083