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Segment Reporting (Detail) (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2014 | Sep. 30, 2013 | Sep. 30, 2014 | Sep. 30, 2013
Segment Reporting Information [Line Items] |  |  |  |
Product revenues | $ 206,012 | $ 171,182 | $ 606,132 | $ 479,792
Total product revenues in percentage | 100.00% | 100.00% | 100.00% | 100.00%
United States |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Product revenues | 96,680 | 76,543 | 270,597 | 211,462
Total product revenues in percentage | 47.00% | 45.00% | 45.00% | 44.00%
Germany |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Product revenues | 22,529 | 20,847 | 70,491 | 61,332
Total product revenues in percentage | 11.00% | 12.00% | 12.00% | 13.00%
South Korea |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Product revenues | 21,339 | 13,546 | 67,293 | 39,069
Total product revenues in percentage | 10.00% | 8.00% | 11.00% | 8.00%
China |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Product revenues | 17,557 | 18,285 | 50,850 | 47,972
Total product revenues in percentage | 9.00% | 11.00% | 8.00% | 10.00%
Japan |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Product revenues | 11,970 | 10,281 | 34,291 | 28,591
Total product revenues in percentage | 6.00% | 6.00% | 6.00% | 6.00%
Czech Republic |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Product revenues | 6,457 | 4,114 | 19,398 | 11,893
Total product revenues in percentage | 3.00% | 2.00% | 3.00% | 3.00%
United Kingdom |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Product revenues | 5,363 | 5,180 | 18,162 | 13,319
Total product revenues in percentage | 3.00% | 3.00% | 3.00% | 3.00%
Mexico |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Product revenues | 4,991 | 4,230 | 14,752 | 11,696
Total product revenues in percentage | 2.00% | 2.00% | 2.00% | 2.00%
Canada |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Product revenues | 4,811 | 3,432 | 12,542 | 10,533
Total product revenues in percentage | 2.00% | 2.00% | 2.00% | 2.00%
Other |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Product revenues | 14,315 | 14,724 | 47,756 | 43,925
Total product revenues in percentage | 7.00% | 9.00% | 8.00% | 9.00%
Non U.S. |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Product revenues | $ 109,332 | $ 94,639 | $ 335,535 | $ 268,330
Total product revenues in percentage | 53.00% | 55.00% | 55.00% | 56.00%

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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=26872669&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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