Acquisitions (Narrative) (Details) $ in Thousands			12 Months Ended
	Aug. 07, 2015 USD ($) employee	Sep. 16, 2013 USD ($) employee	Jan. 02, 2016 USD ($)	Dec. 27, 2014 USD ($)	Dec. 28, 2013 USD ($)
Business Acquisition [Line Items]
Acquisition related costs			$ 1,100	$ 5,200	$ 8,700
Gain on bargain purchase			$ 0	$ 0	$ 17,262
Intangible asset, useful life (years)			11 years
Asendia [Member]
Business Acquisition [Line Items]
Number of employees (employee) | employee	40
Acquisition purchase price	$ 2,000
Other intangible assets acquired	$ 133
National Envelope Acquisition [Member]
Business Acquisition [Line Items]
Number of employees (employee) | employee		1,600
Acquisition purchase price		$ 34,062
Acquistion purchase price, company common stock		6,000
Gain on bargain purchase		17,262
Gain on bargain purchase, tax expense		6,800
Other intangible assets		4,430
Leashold interests [Member]
Business Acquisition [Line Items]
Intangible asset, useful life (years)			17 years
Leashold interests [Member] | National Envelope Acquisition [Member]
Business Acquisition [Line Items]
Other intangible assets		$ 4,400
Intangible asset, useful life (years)		20 years