Value Creation Plan (Disclosure of costs incurred under the Value Creation Plan) (Details) - Value Creation Plan [Member] - USD ($) $ in Thousands	3 Months Ended
	Mar. 28, 2020	Mar. 30, 2019
Restructuring Reserve [Roll Forward]
Balance payable, Beginning	$ 4,227	$ 913
Costs incurred and charged to expense	1,995	1,858
Cash payments, net	(2,375)	(1,849)
Non-cash adjustments	382	2,102
Balance payable, Ending	4,229	3,024
Asset impairments and facility closure costs [Member]
Restructuring Reserve [Roll Forward]
Balance payable, Beginning	201	477
Costs incurred and charged to expense	389	256
Cash payments, net	(138)	(381)
Non-cash adjustments	(78)	0
Balance payable, Ending	374	352
Employee recruitment, retention and termination costs [Member]
Restructuring Reserve [Roll Forward]
Balance payable, Beginning	4,026	436
Costs incurred and charged to expense	1,055	1,508
Cash payments, net	(1,890)	(1,374)
Non-cash adjustments	460	2,102
Balance payable, Ending	3,651	2,672
Professional fees and temporary labor costs [Member]
Restructuring Reserve [Roll Forward]
Balance payable, Beginning	0	0
Costs incurred and charged to expense	551	94
Cash payments, net	(347)	(94)
Non-cash adjustments	0	0
Balance payable, Ending	$ 204	$ 0