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Provision for Income Taxes (Detail) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 9 Months Ended
Sep. 30, 2012
Sep. 30, 2011
Sep. 30, 2012
Sep. 30, 2011
Income Taxes [Line Items]        
Expected tax expense, at the U.S. federal statutory income tax rate of 35%     $ 3,766 $ 4,600
Non-U.S. tax rates     (742) (899)
Incremental tax on earnings of non-U.S. companies     1,478 2,694
U.S State income taxes, net     388 366
Non-Taxable income     (195)  
Other, net     (160) (324)
Total income tax expense $ 1,605 $ 302 $ 4,535 $ 6,437