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Restructuring and Other Charges - Additional Information (Detail) $ in Thousands | 12 Months Ended
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Dec. 31, 2016 USD ($) | Dec. 31, 2015 USD ($) | Dec. 31, 2014 USD ($)
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring charges | $ 5,694 | $ 12,258 | $ 8,515
Number of employees who accepted the VRIP | 83 |  |
Restructuring Charges before Adjustments | $ 7,300 |  |
International |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring charges | 5,300 | 7,400 | 8,000
Americas |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring charges | 1,800 | 3,300 | 500
Corporate |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring charges | 200 | $ 1,600 | 0
Special termination benefits |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Non-cash special termination benefit expense | 11,500 |  |
Staff Reductions |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring charges | $ 5,700 |  |
Reduction in headcount | 179 | 216 |
Staff Reductions | International |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring charges | $ 5,300 | $ 7,400 | $ 8,000
Reduction in headcount | 75 | 134 |
Staff Reductions | Americas |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring charges | $ 1,800 | $ 3,300 |
Reduction in headcount | 103 | 70 |
Staff Reductions | Corporate |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring charges |  | $ 1,600 |
Reduction in headcount | 1 | 12 |

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