Reconciliations Between Statutory Federal Income Tax Rate and Effective Rate (Detail)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Income Tax Disclosure [Abstract]
Statutory Federal income tax rate	34.00%	34.00%	34.00%
Increase (Decrease) resulting from:
U.S. Taxes on foreign income, net of taxes paid credit	1.30%	1.00%	0.30%
Change in valuation allowance	5.30%	(1.90%)	(0.80%)
Foreign, state and local tax, net of Federal benefit	1.10%	1.60%	1.90%
Nondeductible expenses	2.40%	1.80%	1.80%
Stock option compensation		(0.10%)	(0.10%)
Research and development credits	(0.70%)	(0.90%)	(0.50%)
Effect of different tax rates of foreign jurisdictions	(15.00%)	(12.10%)	(10.00%)
Undistributed profits of subsidiaries	7.90%	2.40%
Other tax exempt income		(0.10%)	(0.90%)
Tax effects of intercompany transfers	(5.30%)
Other	(0.30%)	0.30%	(0.10%)
Effective rate	30.70%	26.00%	25.60%