Acquisitions (Purchase Price Allocation of National Envelope) (Details) - USD ($) $ in Thousands		12 Months Ended
	Sep. 16, 2013	Jan. 02, 2016	Dec. 27, 2014	Dec. 28, 2013
Business Acquisition [Line Items]
Gain on bargain purchase		$ 0	$ 0	$ 17,262
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
Total assets acquired	51,324
Cost of the acquisition of certain assets of National	34,062
Gain on bargain purchase	$ 17,262