Segment and Geographic Information - Schedule of Net Sales to External Customers and Location of Net Plant, Equipment and Timberlands (Detail) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	$ 412,852	$ 419,960	$ 410,803	$ 417,469	$ 436,261	$ 465,092	$ 445,341	$ 455,721	$ 1,661,084	$ 1,802,415	$ 1,722,615
Plant, Equipment and Timberlands - Net	698,864				697,608				698,864	697,608	723,300
Operating Segments [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales									1,661,084	1,802,415	1,722,615
Plant, Equipment and Timberlands - Net	698,864				697,608				698,864	697,608	723,340
Operating Segments [Member] \| United States [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales									959,730	980,933	968,833
Plant, Equipment and Timberlands - Net	287,447				256,251				287,447	256,251	248,306
Operating Segments [Member] \| Germany [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales									444,009	529,003	483,859
Plant, Equipment and Timberlands - Net	232,340				257,311				232,340	257,311	287,880
Operating Segments [Member] \| United Kingdom [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales									86,442	103,219	107,082
Plant, Equipment and Timberlands - Net	62,931				62,617				62,931	62,617	63,650
Operating Segments [Member] \| Canada [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales									118,568	129,401	113,414
Plant, Equipment and Timberlands - Net	81,201				82,774				81,201	82,774	83,033
Operating Segments [Member] \| Other [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales									52,335	59,859	49,427
Plant, Equipment and Timberlands - Net	$ 34,945				$ 38,655				$ 34,945	$ 38,655	$ 40,471