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Reportable Segments and Geographic Data (Schedule of Financial Data by Geographic Area) (Details) (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2011 | Sep. 30, 2011 | Jun. 30, 2011 | Mar. 31, 2011 | Dec. 31, 2010 | Sep. 30, 2010 | Jun. 30, 2010 | Mar. 31, 2010 | Dec. 31, 2009 | Sep. 30, 2009 | Jun. 30, 2009 | Mar. 31, 2009 | Dec. 31, 2011 | Dec. 31, 2010 | Dec. 31, 2009
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net sales | $ 202,600 | $ 206,700 | $ 198,600 | $ 206,800 | $ 199,800 | $ 192,200 | $ 193,700 | $ 180,100 | $ 194,000 | $ 186,700 | $ 182,100 | $ 174,900 | $ 814,696 | $ 765,769 | $ 737,621
Property, plant and equipment, at cost, net | 439,516 |  |  |  | 481,952 |  |  |  | 507,440 |  |  |  | 439,516 | 481,952 | 507,440
United States |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  |  |  |  |  | 324,143 | 312,590 | 305,630
Property, plant and equipment, at cost, net | 134,078 |  |  |  | 141,037 |  |  |  | 148,578 |  |  |  | 134,078 | 141,037 | 148,578
Switzerland |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  |  |  |  |  | 245,562 | 223,443 | 212,544
Brazil |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  |  |  |  |  | 61,493 | 61,410 | 57,745
Korea |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Property, plant and equipment, at cost, net | 34,102 |  |  |  | 40,473 |  |  |  | 34,556 |  |  |  | 34,102 | 40,473 | 34,556
Canada |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  |  |  |  |  | 40,422 | 36,804 | 37,709
Property, plant and equipment, at cost, net | 29,650 |  |  |  | 34,149 |  |  |  | 38,329 |  |  |  | 29,650 | 34,149 | 38,329
China |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  |  |  |  |  | 34,977 | 25,171 | 14,558
Property, plant and equipment, at cost, net | 126,072 |  |  |  | 133,851 |  |  |  | 135,239 |  |  |  | 126,072 | 133,851 | 135,239
Other Countries [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  |  |  |  |  | 108,099 | 106,351 | 109,435
Property, plant and equipment, at cost, net | 62,208 |  |  |  | 71,387 |  |  |  | 86,126 |  |  |  | 62,208 | 71,387 | 86,126
United Kingdom |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Property, plant and equipment, at cost, net | 27,196 |  |  |  | 28,425 |  |  |  | 31,021 |  |  |  | 27,196 | 28,425 | 31,021
Sweden |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Property, plant and equipment, at cost, net | $ 26,210 |  |  |  | $ 32,630 |  |  |  | $ 33,591 |  |  |  | $ 26,210 | $ 32,630 | $ 33,591

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- Definition Tangible assets that are held by an entity for use in the production or supply of goods and services, for rental to others, or for administrative purposes and that are expected to provide economic benefit for more than one year; net of accumulated depreciation. Examples include land, buildings, machinery and equipment, and other types of furniture and equipment including, but not limited to, office equipment, furniture and fixtures, and computer equipment and software. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.13) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Article 7 -Section 03 -Paragraph 8 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 13 -Subparagraph a -Article 5 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 12 -Paragraph 5 -Subparagraph b, c -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229 + Details
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