Acquisition - Additional Information (Detail) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
	Oct. 01, 2014	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Business Acquisition [Line Items]
Revenue		$ 421,113	$ 465,952	$ 1,252,168	$ 1,373,066
Spezialpapierfabrik Oberschmitten GmbH [Member]
Business Acquisition [Line Items]
Date of acquisition				Oct. 01, 2014
Payment made for acquisition	$ 8,200
Revenue	$ 33,000