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Corporate Restructuring and Other Organizational Changes - Additional Information (Detail) $ in Thousands | 12 Months Ended
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Dec. 31, 2015 USD ($) Position | Dec. 31, 2014 USD ($) Position | Dec. 31, 2013 USD ($) Position
Restructuring Cost and Reserve [Line Items] |  |  |
Employee termination costs | $ 1,300 | $ 8,700 | $ 8,900
Number of positions eliminated | Position | 30 | 220 | 147
Restructuring costs | $ 3,056 | $ 9,024 |
Employee termination costs paid during the period |  | 6,200 |
Restructuring charges | 1,045 | 2,793 | $ 3,341
Other Current Liabilities |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring charges | 300 |  |
Severance [Member] |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring costs | 2,872 | 7,741 |
Severance liability to be paid over the next 12 months | 800 |  |
Restructuring charges | 777 | 2,341 | 1,470
General and Administrative | Leased Facilities in Chantilly, VA, North Brunswick, NJ, Columbus, OH, Duluth, GA, and Bangalore, India |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Lease termination fee |  |  | 1,700
Americas [Member] |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Employee termination costs | 700 | 5,700 | 6,300
EMEA [Member] |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Employee termination costs | $ 600 | 2,000 | 2,200
Asia/Pacific [Member] |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Employee termination costs |  | $ 1,000 | $ 400

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