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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 | 12 Months Ended
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Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |
Revenue | $ 520,753 | $ 450,557 | $ 426,449
Long-lived assets | 56,311 | 55,894 | 47,468
United States [Member] |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |
Revenue | 136,611 | 119,781 | 120,523
Long-lived assets | 40,404 | 40,742 | 33,750
Europe [Member] |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |
Revenue | 231,731 | 199,127 | 195,214
Long-lived assets | 12,981 | 12,498 | 10,941
Greater China [Member] |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |
Revenue | 63,471 | 54,137 | 38,184
Long-lived assets | 994 | 873 | 858
Other [Member] |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |
Revenue | 88,940 | 77,512 | 72,528
Long-lived assets | $ 1,932 | $ 1,781 | $ 1,919

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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=63488584&loc=d3e20235-122688 + Details
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