Acquisitions (Narrative) (Details) (USD $)	3 Months Ended		9 Months Ended			0 Months Ended	3 Months Ended	9 Months Ended	0 Months Ended
	Sep. 27, 2014	Sep. 28, 2013	Sep. 27, 2014	Sep. 28, 2013	Dec. 28, 2013	Sep. 16, 2013 National Envelope Acquisition [Member] employee	Sep. 28, 2013 National Envelope Acquisition [Member]	Sep. 28, 2013 National Envelope Acquisition [Member]	Dec. 31, 2012 Express Label Acquisition [Member]	Sep. 16, 2013 Leasehold interests [Member] National Envelope Acquisition [Member]	Dec. 31, 2012 Customer relationships [Member] Express Label Acquisition [Member]	Dec. 31, 2012 Trade Names [Member] Express Label Acquisition [Member]
Business Acquisition [Line Items]
Acquisition related costs	$ 900,000	$ 5,000,000	$ 5,200,000	$ 5,700,000			$ 4,700,000	$ 4,800,000
Number of employees (employee)						1,600
Acquisition purchase price						34,062,000			5,100,000
Acquistion purchase price, company common stock						6,000,000
Gain on bargain purchase	0	17,262,000	0	17,262,000		17,262,000
Gain on bargain purchase, tax expense						6,800,000
Finite-lived intangible assets						4,430,000				4,400,000	3,000,000	300,000
Intangible asset, useful life (years)										20 years 0 months	10 years	10 years
Annual net sales prior to acquisition by the Company									5,400,000
Goodwill	$ 186,271,000		$ 186,271,000		$ 186,436,000				$ 100,000