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Selected Segment Financial Data, Revenues and Operating Income (Loss) (Detail) (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2012 | Jun. 30, 2011 | Jun. 30, 2012 | Jun. 30, 2011
Segment Reporting Information [Line Items] |  |  |  |
Revenues | $ 149,797 | $ 113,366 | $ 287,422 | $ 217,909
Operating income (loss) | (7,858) | 10,422 | (9,471) | 17,920
Americas |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Revenues | 81,727 | 57,974 | 155,908 | 110,304
Operating income (loss) | 9,928 | 15,920 | 30,091 | 27,436
EMEA |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Revenues | 49,616 | 41,880 | 94,408 | 84,021
Operating income (loss) | 12,446 | 9,835 | 24,450 | 21,287
Asia /Pacific |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Revenues | 18,454 | 13,512 | 37,106 | 23,584
Operating income (loss) | 3,798 | 1,105 | 8,024 | 522
Corporate |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Operating income (loss) | $ (34,030) | $ (16,438) | $ (72,036) | $ (31,325)

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