v2.4.0.8
Income Taxes - Additional Information (Detail) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 9 Months Ended
Sep. 30, 2014
Sep. 30, 2013
Sep. 30, 2014
Sep. 30, 2013
Income Taxes [Line Items]        
Effective tax rate 12.50% 11.10% 8.20% 10.50%
Income tax provision expense (benefit) $ 79,108 $ 57,477 $ 216,487 $ 164,552