Sales by Destination (Details) (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]
Total Sales	$ 520,242	$ 384,784	$ 409,077	$ 393,719	$ 412,660	$ 386,163	$ 348,096	$ 336,571	$ 1,707,822	$ 1,483,490	$ 1,420,960
Revenue, net, percentage									100.00%	100.00%	100.00%
Customer Concentration Risk [Member] | United States [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Total Sales									818,000	690,000	669,000
Revenue, net, percentage									48.00%	47.00%	47.00%
Customer Concentration Risk [Member] | China [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Total Sales									351,000	281,000	277,000
Revenue, net, percentage									20.00%	19.00%	19.00%
Customer Concentration Risk [Member] | Japan [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Total Sales									150,000	170,000	159,000
Revenue, net, percentage									9.00%	11.00%	11.00%
Customer Concentration Risk [Member] | New Zealand [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Total Sales									157,000	18,000	22,000
Revenue, net, percentage									9.00%	1.00%	2.00%
Customer Concentration Risk [Member] | Europe [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Total Sales									79,000	182,000	173,000
Revenue, net, percentage									5.00%	12.00%	12.00%
Customer Concentration Risk [Member] | Other Asia [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Total Sales									82,000	68,000	55,000
Revenue, net, percentage									5.00%	5.00%	4.00%
Customer Concentration Risk [Member] | Latin America [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Total Sales									60,000	53,000	36,000
Revenue, net, percentage									3.00%	4.00%	3.00%
Customer Concentration Risk [Member] | Canada [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Total Sales									1,000	4,000	9,000
Revenue, net, percentage									0.00%	0.00%	1.00%
Customer Concentration Risk [Member] | All other [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Total Sales									$ 10,000	$ 17,000	$ 21,000
Revenue, net, percentage									1.00%	1.00%	1.00%