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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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