Acquisitions (Purchase Price Allocation of National Envelope) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended		0 Months Ended
	Sep. 27, 2014	Sep. 28, 2013	Sep. 27, 2014	Sep. 28, 2013	Sep. 16, 2013 National Envelope Acquisition [Member]
Business Acquisition [Line Items]
Property, plant and equipment					$ 53,108
Other intangible assets					4,430
Total assets acquired					57,538
Accounts payable					1,015
Accrued compensation and related liabilities					1,210
Other current liabilities					1,453
Note payable					2,536
Total liabilities assumed					6,214
Net assets acquired					51,324
Cost of the acquisition of certain assets of National					34,062
Gain on bargain purchase	$ 0	$ 17,262	$ 0	$ 17,262	$ 17,262