Sales by Destination (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011	Sep. 30, 2011	Jun. 30, 2011	Mar. 31, 2011	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Sales by Destination [Line Items]
Sales Revenue, Net, Percentage									100.00%	100.00%	100.00%
Revenue, Net	$ 434,306	$ 408,988	$ 371,926	$ 355,780	$ 388,423	$ 385,091	$ 357,397	$ 357,731	$ 1,571,000	$ 1,488,642	$ 1,315,233
United States
Sales by Destination [Line Items]
Sales Revenue, Net, Percentage									50.00%	49.00%	53.00%
Revenue, Net									778,000	737,000	693,000
China
Sales by Destination [Line Items]
Sales Revenue, Net, Percentage									18.00%	19.00%	16.00%
Revenue, Net									281,000	277,000	213,000
Europe
Sales by Destination [Line Items]
Sales Revenue, Net, Percentage									12.00%	12.00%	12.00%
Revenue, Net									182,000	173,000	152,000
JAPAN
Sales by Destination [Line Items]
Sales Revenue, Net, Percentage									11.00%	11.00%	10.00%
Revenue, Net									170,000	159,000	129,000
Other Asia
Sales by Destination [Line Items]
Sales Revenue, Net, Percentage									4.00%	4.00%	4.00%
Revenue, Net									68,000	55,000	49,000
Latin America
Sales by Destination [Line Items]
Sales Revenue, Net, Percentage									3.00%	2.00%	3.00%
Revenue, Net									53,000	36,000	35,000
New Zealand
Sales by Destination [Line Items]
Sales Revenue, Net, Percentage									1.00%	1.00%	1.00%
Revenue, Net									18,000	22,000	17,000
Canada
Sales by Destination [Line Items]
Sales Revenue, Net, Percentage									0.00%	1.00%	1.00%
Revenue, Net									4,000	9,000	10,000
All other countries
Sales by Destination [Line Items]
Sales Revenue, Net, Percentage									1.00%	1.00%	0.00%
Revenue, Net									$ 17,000	$ 21,000	$ 17,000