Acquisitions (Purchase Price Allocation of National Envelope) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended			0 Months Ended
	Dec. 28, 2013	Dec. 29, 2012	Dec. 31, 2011	Sep. 16, 2013 National Envelope Acquisition [Member]
Business Acquisition [Line Items]
Property, plant and equipment				$ 54,900
Other intangible assets				3,780
Total assets acquired				58,680
Accounts payable				967
Accrued compensation and related liabilities				1,210
Other current liabilities				1,351
Other liabilities				1,292
Note payable				2,536
Total liabilities assumed				7,356
Net assets acquired				51,324
Cost of the acquisition of certain assets of National				34,062
Gain on bargain purchase	$ 17,262	$ 0	$ 11,720	$ 17,262