Income Taxes Effective Tax Rate Reconciliation (Detail)	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Effective Income Tax Rate Reconciliation, Percent [Abstract]
Statutory income tax rate	19.30%	34.40%
Foreign earnings subject to different tax rates	14.80%	(11.70%)
Branch profits tax	8.50%
Deemed dividends	9.60%
State and other complement tax	23.20%	2.60%
Return to provision	10.40%	(4.90%)
Valuation allowance	51.40%	12.00%
Other	4.50%	(4.80%)
Effective tax rate	141.50%	27.60%