Commitments and Contingencies - Additional Information (Details)			1 Months Ended		3 Months Ended	6 Months Ended		12 Months Ended
	Apr. 07, 2015 USD ($)	Sep. 15, 2014 USD ($) action	Mar. 29, 2015 USD ($) defendant	Mar. 30, 2014 defendant	Mar. 29, 2015 USD ($)	Jun. 28, 2015 USD ($)	Jun. 29, 2014 USD ($)	Dec. 31, 2014 USD ($)	Nov. 08, 2011 USD ($)
Site Contingency [Line Items]
Environmental accrual						$ 25,770,000		$ 59,253,000
Number of actions | action		81
Environmental remediation spent						720,000	$ 14,934,000
Maximum penalty per day		$ 0.75
Operating Units 2 - 5 [Member]
Site Contingency [Line Items]
Increase (decrease) due to revision of estimates						32,543,000
U.S. Mills [Member]
Site Contingency [Line Items]
Environmental accrual								37,775,000
Environmental contingencies future related cost, high estimate						123,000,000
U.S. Mills [Member] | Lower Fox River [Member]
Site Contingency [Line Items]
Number of defendants | defendant				5
Settlement amount	$ 14,700,000
U.S. Mills [Member] | Operating Units 2 - 5 [Member]
Site Contingency [Line Items]
Environmental accrual			$ 5,000,000		$ 5,000,000	4,512,000
Environmental remediation spent					$ 232,000	488,000
Tegrant Holding Corporation [Member]
Site Contingency [Line Items]
Environmental accrual						18,525,000		18,635,000	$ 18,850,000
Increase (decrease) due to revision of estimates								$ (324,000)
Payment towards remediation of sites						649,000
Appvion, Inc. [Member] | U.S. Mills [Member] | Lower Fox River [Member]
Site Contingency [Line Items]
Number of defendants | defendant			8
Total estimated possible claim						$ 200,000