v2.4.0.6
Provision for Income Taxes - Reconciliation of Statutory Income Tax Rate (Detail)
12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Income Tax Disclosure [Line Items]      
Statutory income tax in the Netherlands 25.00% 25.00% 25.50%
Rate differential local statutory rates versus statutory rate of the Netherlands 64.00% (15.70%) 1.60%
Net change in valuation allowance (178.00%) 12.70% (16.70%)
Prior year adjustments 5.20% (2.00%) (1.60%)
Non-taxable income 41.60% (10.80%) 0.70%
Non-tax-deductible expenses/losses (69.60%) 19.60% (12.30%)
Other taxes and tax rate changes 18.20% (1.00%) 0.10%
Withholding taxes (7.60%) 6.90% (4.10%)
Unrecognized tax benefits (24.80%) (1.00%) (2.50%)
Tax incentives 122.00% (12.70%) 2.50%
Effective tax rate (4.00%) 21.00% (6.80%)