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Schedule of Reconciliation of Effective Tax Rate (Detail) | 12 Months Ended
--- | ---
Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013
Income Tax Disclosure [Line Items] |  |  |
U.S. statutory federal tax rate | 35.00% | 35.00% | 35.00%
Foreign taxes | (16.50%) | (58.10%) | (11.40%)
Goodwill impairment |  | 36.30% |
U.S. research and development credit | (3.00%) | (7.90%) | (7.20%)
Uncertain tax positions | 2.10% | 7.90% | 4.20%
Valuation allowance |  |  | 0.40%
State income taxes, net of federal tax benefit | 0.40% | (0.10%) | 0.10%
Other, net | 0.40% | 1.70% | (2.80%)
Effective tax rate, Total | 18.40% | 14.80% | 18.30%

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