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Segment Information - Selected Segment Financial Data, Revenues and Income (Loss) Before Income Taxes (Detail) - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2016 | Mar. 31, 2015
Segment Reporting Information [Line Items] |  |
Revenues | $ 226,066 | $ 232,817
Income (loss) before income taxes | 126,333 | (692)
Operating Segments [Member] | Americas Segment [Member] |  |
Segment Reporting Information [Line Items] |  |
Income (loss) before income taxes | 149,997 | 16,109
Operating Segments [Member] | Americas Segment [Member] | United States [Member] |  |
Segment Reporting Information [Line Items] |  |
Revenues | 133,365 | 145,784
Operating Segments [Member] | Americas Segment [Member] | Other [Member] |  |
Segment Reporting Information [Line Items] |  |
Revenues | 22,852 | 17,966
Operating Segments [Member] | EMEA Segment [Member] |  |
Segment Reporting Information [Line Items] |  |
Revenues | 49,637 | 49,384
Income (loss) before income taxes | 29,427 | 20,701
Operating Segments [Member] | Asia/Pacific Segment [Member] |  |
Segment Reporting Information [Line Items] |  |
Revenues | 20,212 | 19,683
Income (loss) before income taxes | 10,566 | 10,257
Corporate, Non-Segment [Member] |  |
Segment Reporting Information [Line Items] |  |
Income (loss) before income taxes | $ (63,657) | $ (47,759)

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- Definition This element represents the income or loss from continuing operations attributable to the economic entity which may also be defined as revenue less expenses from ongoing operations, after income or loss from equity method investments, but before income taxes, extraordinary items, and noncontrolling interest. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 940 -SubTopic 20 -Section 25 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=51673353&loc=d3e41242-110953 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 10 -Article 5 + Details
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- Definition Total revenue from sale of goods and services rendered during the reporting period, in the normal course of business, reduced by sales returns and allowances, and sales 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) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 + Details
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