Contingencies (Narrative) (Details) - USD ($) $ in Thousands				3 Months Ended
	May. 03, 2016	Dec. 21, 2015	Aug. 18, 2015	Mar. 27, 2016	Mar. 29, 2015	Mar. 31, 2013	Dec. 25, 2011	Nov. 02, 2011	Dec. 28, 2008
Loss Contingencies [Line Items]
Loss contingency accrual									$ 5,700
Estimated litigation liability								$ 6,600
Loss contingency accrual, provision							$ 900
Litigation settlement				$ (8,100)	$ 0	$ 6,600
Litigation settlement, amount		$ 10,300
Loss contingency, damages sought				65,000
Pending Litigation | All-Tag Security Americas, Inc.
Loss Contingencies [Line Items]
Loss Contingency, damages awarded			$ 6,600
Accrued Expense
Loss Contingencies [Line Items]
Loss contingency accrual				$ 100
Subsequent Event
Loss Contingencies [Line Items]
Litigation settlement, amount	$ 8,000
Subsequent Event | Accrued Expense
Loss Contingencies [Line Items]
Loss contingency accrual	$ 8,000