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Segment Information - Selected Segment Financial Data, Revenues and Income (Loss) Before Income Taxes (Detail) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2016
Sep. 30, 2015
Sep. 30, 2016
Sep. 30, 2015
Segment Reporting Information [Line Items]        
Revenues $ 216,975 $ 238,701 $ 662,971 $ 737,340
Income (loss) before income taxes (16,252) 18,566 75,719 50,750
Operating Segments [Member] | Americas Segment [Member]        
Segment Reporting Information [Line Items]        
Income (loss) before income taxes (898) 18,899 145,900 56,577
Operating Segments [Member] | Americas Segment [Member] | United States [Member]        
Segment Reporting Information [Line Items]        
Revenues 117,407 135,504 376,322 442,042
Operating Segments [Member] | Americas Segment [Member] | Other [Member]        
Segment Reporting Information [Line Items]        
Revenues 21,101 22,787 67,663 57,730
Operating Segments [Member] | EMEA Segment [Member]        
Segment Reporting Information [Line Items]        
Revenues 55,511 60,558 152,723 178,446
Income (loss) before income taxes 34,138 34,893 93,070 89,088
Operating Segments [Member] | Asia/Pacific Segment [Member]        
Segment Reporting Information [Line Items]        
Revenues 22,956 19,852 66,263 59,122
Income (loss) before income taxes 15,275 10,041 37,794 28,613
Corporate, Non-Segment [Member]        
Segment Reporting Information [Line Items]        
Income (loss) before income taxes $ (64,767) $ (45,267) $ (201,045) $ (123,528)