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Cost-Reduction Actions - Additional Information (Detail) | 3 Months Ended
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Mar. 31, 2018 USD ($) | Mar. 31, 2017 USD ($) employee
Restructuring Cost and Reserve [Line Items] |  |
Restructuring charges | $ 0 | $ 25,400,000
Severance costs |  | 12,500,000
Other expenses related to the cost reduction effort |  | 12,900,000
Cost of Revenue | Services |  |
Restructuring Cost and Reserve [Line Items] |  |
Restructuring charges |  | 8,500,000
Selling, general and administrative expenses |  |
Restructuring Cost and Reserve [Line Items] |  |
Restructuring charges |  | 11,300,000
Research and development expenses |  |
Restructuring Cost and Reserve [Line Items] |  |
Restructuring charges |  | 300,000
Other income (expense), net |  |
Restructuring Cost and Reserve [Line Items] |  |
Restructuring charges |  | 5,300,000
Idle leased facilities |  |
Restructuring Cost and Reserve [Line Items] |  |
Other expenses related to the cost reduction effort |  | 2,900,000
Income for changes in estimates | 100,000 |
Contract amendment and termination |  |
Restructuring Cost and Reserve [Line Items] |  |
Other expenses related to the cost reduction effort |  | 3,300,000
Professional fees and other |  |
Restructuring Cost and Reserve [Line Items] |  |
Other expenses related to the cost reduction effort |  | 1,400,000
Net foreign currency translation adjustment |  |
Restructuring Cost and Reserve [Line Items] |  |
Other expenses related to the cost reduction effort |  | 5,300,000
Net foreign currency translation adjustment | Other income (expense), net |  |
Restructuring Cost and Reserve [Line Items] |  |
Restructuring charges |  | 5,300,000
Employee severance and idle leased facilities |  |
Restructuring Cost and Reserve [Line Items] |  |
Income for changes in estimates | $ (2,900,000) |
United States |  |
Restructuring Cost and Reserve [Line Items] |  |
Severance costs |  | $ 500,000
Number of employees | employee |  | 45
United States | Changes in estimates |  |
Restructuring Cost and Reserve [Line Items] |  |
Severance costs |  | $ (100,000)
Non-US |  |
Restructuring Cost and Reserve [Line Items] |  |
Severance costs |  | $ 4,200,000
Number of employees | employee |  | 75
Non-US | Changes in estimates |  |
Restructuring Cost and Reserve [Line Items] |  |
Severance costs |  | $ (300,000)
Non-US | Additional benefits provided in 2017 |  |
Restructuring Cost and Reserve [Line Items] |  |
Severance costs |  | $ 8,200,000

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