Segment and Geographic Information - Schedule of Net Sales to External Customers and Location of Net Plant, Equipment and Timberlands (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	$ 434,811	$ 456,648	$ 425,967	$ 405,189	$ 391,389	$ 404,354	$ 384,693	$ 397,352	$ 1,722,615	$ 1,577,788	$ 1,603,154
Plant, Equipment and Timberlands - Net	723,340				621,186				723,340	621,186	602,000
Operating Segments [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales									1,722,615	1,577,788	1,603,154
Plant, Equipment and Timberlands - Net	723,340				621,186				723,340	621,186	601,950
Operating Segments [Member] | United States [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales									968,833	952,195	933,357
Plant, Equipment and Timberlands - Net	248,306				248,185				248,306	248,185	250,217
Operating Segments [Member] | Germany [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales									483,859	358,442	410,183
Plant, Equipment and Timberlands - Net	287,880				191,559				287,880	191,559	181,537
Operating Segments [Member] | United Kingdom [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales									107,082	119,092	122,218
Plant, Equipment and Timberlands - Net	63,650				59,131				63,650	59,131	57,634
Operating Segments [Member] | Canada [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales									113,414	106,702	88,018
Plant, Equipment and Timberlands - Net	83,033				83,796				83,033	83,796	86,079
Operating Segments [Member] | Other [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales									49,427	41,357	49,378
Plant, Equipment and Timberlands - Net	$ 40,471				$ 38,515				$ 40,471	$ 38,515	$ 26,483