Differentiation between Federal Statutory Tax Rate and Effective Tax Rate (Detail)	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Income Tax Rate Reconciliation [Line Items]
Statutory provision	35.00%	35.00%	35.00%	35.00%
State taxes, net of federal benefit	0.10%	(0.20%)	0.20%	0.00%
City taxes	0.10%		0.10%
Foreign effective tax rates different from US statutory rate	(15.90%)	(9.60%)	(13.30%)	(10.50%)
Tax reserve			(0.80%)
Valuation Allowance	2.10%		1.00%
Effective Income Tax Rate	21.40%	25.20%	22.20%	24.50%