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Income Taxes - Additional Information (Detail) (USD $)
 3 Months Ended 9 Months Ended
Sep. 30, 2013
Sep. 30, 2012
Sep. 30, 2013
Sep. 30, 2012
Dec. 31, 2012
Income Taxes [Line Items]          
Effective tax rate, benefit percentage 28.00%   27.80% 90.60%  
Earnings of foreign entities $ 7,400,000 $ 14,500,000 $ 18,900,000 $ 37,000,000  
Recognition of tax benefit 5,347,000 (1,175,000) 5,183,000 (7,925,000)  
Positive impact of valuation allowance on effective tax rate       1,400,000  
Release of an accrued tax liability   1,600,000   1,600,000  
Positive impact of uncertain tax positions on effective tax rate   1,000,000   1,000,000  
Unrecognized tax benefit for uncertain tax positions 15,500,000   15,500,000   13,100,000
Accrued interest and penalties related to income tax liabilities 2,100,000   2,100,000   1,800,000
Decrease in unrecognized tax benefits due to expiration of statutes of limitations and settlement of various audits 2,000,000   2,000,000    
2012 American Taxpayer Relief Act
          
Income Taxes [Line Items]          
Recognition of tax benefit     1,400,000    
ORCC
          
Income Taxes [Line Items]          
Increase in unrecognized tax benefits for uncertain tax positions     1,900,000    
PTESA
          
Income Taxes [Line Items]          
Increase in unrecognized tax benefits for uncertain tax positions     $ 400,000