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Segment and Geographic Information - Schedule of Revenue from External Customers and Long-Lived Assets, by Geographical Areas (Detail) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
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Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2010
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |
Product revenue | $ 295,588 | $ 297,310 | $ 263,463
Service revenue | 28,691 | 24,604 | 27,228
Long-lived assets | 134,106 | 135,710 | 136,489
United States [Member] |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |
Product revenue | 87,877 | 87,166 | 74,105
Service revenue | 13,248 | 10,796 | 12,493
Long-lived assets | 120,596 | 121,174 | 122,760
Europe [Member] |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |
Product revenue | 95,376 | 100,984 | 83,432
Service revenue | 6,083 | 6,343 | 7,611
Long-lived assets | 4,939 | 10,811 | 10,387
Japan [Member] |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |
Product revenue | 38,151 | 45,295 | 55,269
Service revenue | 5,043 | 4,147 | 3,986
Long-lived assets | 2,229 | 2,773 | 2,457
Other [Member] |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |
Product revenue | 74,184 | 63,865 | 50,657
Service revenue | 4,317 | 3,318 | 3,138
Long-lived assets | $ 6,342 | $ 952 | $ 885

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- Definition Aggregate revenue during the period from the sale of goods in the normal course of business, after deducting returns, allowances and discounts. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.1(a)) -URI http://asc.fasb.org/extlink&oid=6880815&loc=d3e20235-122688 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 1 -Article 5 + Details
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