Commitments and Contingencies - Additional Information (Detail)			1 Months Ended	12 Months Ended
	Apr. 07, 2015 USD ($) defendant	Sep. 15, 2014 USD ($)	Mar. 30, 2014 defendant	Dec. 31, 2015 USD ($)	Dec. 31, 2014 USD ($)	Mar. 29, 2015 USD ($)	Nov. 08, 2011 USD ($)
Site Contingency [Line Items]
Environmental accrual				$ 25,195,000	$ 59,253,000
Penalty per day for failure to comply with its terms		$ 750.00
Total future payments				428,600,000
Payments in 2016				132,800,000
Payments in 2017				165,500,000
Payments in 2018				68,200,000
Payments in 2019				30,800,000
Payments in 2020 - 2023				31,300,000
U.S. Mills
Site Contingency [Line Items]
Environmental accrual				3,896,000	37,775,000
Increase (decrease) due to revision of estimates				32,543,000
Environmental contingencies future related cost, high estimate				125,000,000
Tegrant Holding Corporation
Site Contingency [Line Items]
Environmental accrual				18,521,000	18,635,000		$ 18,850,000
Increase (decrease) due to revision of estimates				68,000	$ 324,000
Payment for remediation				721,000
Lower Fox River | U.S. Mills
Site Contingency [Line Items]
Number of defendants | defendant			5
Settlement amount	$ 14,700,000
Operating Units 2 - 5 | U.S. Mills
Site Contingency [Line Items]
Environmental accrual				3,896,000		$ 5,000,000
Environmental remediation cumulative spending				1,336,000
Appvion, Inc. | Lower Fox River | U.S. Mills
Site Contingency [Line Items]
Number of defendants | defendant	8
Total estimated possible claim				$ 200,000