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							9 Months Ended	12 Months Ended
	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Jun. 30, 2015	Mar. 31, 2015	Sep. 30, 2015	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales	$ 390,865	$ 405,301	$ 406,413	$ 402,218	$ 412,852	$ 410,803	$ 417,469	$ 419,960	$ 1,604,797	$ 1,661,084	$ 1,802,415
Plant, Equipment and Timberlands – Net	775,898				698,864				775,898	698,864	697,608
United States [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales									918,567	959,730	980,933
Plant, Equipment and Timberlands – Net	391,977				287,447				391,977	287,447	256,251
Germany [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales									427,520	444,009	529,003
Plant, Equipment and Timberlands – Net	220,380				232,340				220,380	232,340	257,311
United Kingdom [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales									78,759	86,442	103,219
Plant, Equipment and Timberlands – Net	51,903				62,931				51,903	62,931	62,617
Canada [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales									115,902	118,568	129,401
Plant, Equipment and Timberlands – Net	79,727				81,201				79,727	81,201	82,774
Other [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales									64,049	52,335	59,859
Plant, Equipment and Timberlands – Net	$ 31,911				$ 34,945				$ 31,911	$ 34,945	$ 38,655