Restructuring and Impairment Charges (Schedule of Restructuring Reserve by Type of Cost) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 29, 2018	Dec. 30, 2017	Dec. 31, 2016
Restructuring Reserve [Roll Forward]
Restructuring reserve at beginning of period	$ 1,859	$ 2,704	$ 221
Restructuring charges	2,325	6,205	5,229
Cash payments	(3,898)	(7,050)	(2,746)
Restructuring reserve at end of period	286	1,859	2,704
Severance Costs
Restructuring Reserve [Roll Forward]
Restructuring reserve at beginning of period	1,343	2,704	206
Restructuring charges	355	1,436	3,883
Cash payments	(1,562)	(2,797)	(1,385)
Restructuring reserve at end of period	136	1,343	2,704
Facility Exit Costs & Other
Restructuring Reserve [Roll Forward]
Restructuring reserve at beginning of period	516	0	15
Restructuring charges	1,970	4,769	1,346
Cash payments	(2,336)	(4,253)	(1,361)
Restructuring reserve at end of period	$ 150	$ 516	$ 0