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Selected Segment Financial Data, Revenues and Income (Loss) Before Income Taxes (Detail) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 12 Months Ended
Dec. 31, 2013
Sep. 30, 2013
Jun. 30, 2013
Mar. 31, 2013
Dec. 31, 2012
Sep. 30, 2012
Jun. 30, 2012
Mar. 31, 2012
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Segment Reporting Information [Line Items]                      
Revenues $ 283,162 $ 213,939 $ 205,830 $ 161,997 $ 224,095 $ 155,062 $ 149,797 $ 137,625 $ 864,928 $ 666,579 $ 465,095
Depreciation and amortization expense                 69,967 50,781 28,377
Stock-based compensation expense                 13,572 15,186 11,254
Income (loss) before taxes 74,499 19,109 4,161 (4,610) 74,011 4,480 (10,846) (2,377) 93,159 65,268 64,313
Americas | Operating Segments
                     
Segment Reporting Information [Line Items]                      
Revenues                 541,890 352,197 245,703
Depreciation and amortization expense                 17,030 10,917 11,139
Stock-based compensation expense                 2,392 256 1,496
Income (loss) before taxes                 145,496 103,165 84,392
EMEA | Operating Segments
                     
Segment Reporting Information [Line Items]                      
Revenues                 228,679 218,015 164,874
Depreciation and amortization expense                 6,310 5,175 4,473
Stock-based compensation expense                 759 439 403
Income (loss) before taxes                 87,522 78,848 45,755
Asia/Pacific | Operating Segments
                     
Segment Reporting Information [Line Items]                      
Revenues                 94,359 96,367 54,518
Depreciation and amortization expense                 2,574 3,075 3,410
Stock-based compensation expense                 293 314 418
Income (loss) before taxes                 33,923 32,673 6,962
Corporate | Corporate, Non-Segment
                     
Segment Reporting Information [Line Items]                      
Depreciation and amortization expense                 44,053 31,614 9,355
Stock-based compensation expense                 10,128 14,177 8,937
Income (loss) before taxes                 $ (173,782) $ (149,418) $ (72,796)