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Summary of Significant Accounting Policies - Additional Information (Detail) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
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Jun. 30, 2016 | Jun. 30, 2015 | Jun. 30, 2016 | Jun. 30, 2015
Accounting Policies [Abstract] |  |  |  |
Foreign exchange gain (loss) recognized | $ (200) | $ (700) | $ (800) | $ (2,600)
Error Corrections and Prior Period Adjustments Restatement [Line Items] |  |  |  |
Total other comprehensive (loss) income | $ (20,132) | 59,016 | $ 11,070 | (100,938)
Scenario, Previously Reported | Translation of Acquired Intangibles |  |  |  |
Error Corrections and Prior Period Adjustments Restatement [Line Items] |  |  |  |
Total other comprehensive (loss) income |  | $ 6,800 |  | $ (86,200)

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