v2.4.0.8
Computation of Earnings Per Share (Details) (USD $)
In Thousands, except Per Share data, unless otherwise specified
 3 Months Ended
Mar. 31, 2014
Mar. 31, 2013
Earnings Per Share [Abstract]    
Net income $ 104,653 $ 84,592
Denominator for basic earnings per share—Weighted-average shares outstanding 301,406 298,226
Effect of dilutive securities:    
RSUs 931 683
Stock options 3,166 4,003
Restricted stock 11 25
Denominator for diluted earnings per share—Adjusted weighted-average shares outstanding 305,514 302,937
Earnings per share, basic $ 0.35 [1] $ 0.28 [1]
Earnings per share, diluted $ 0.34 [1] $ 0.28 [1]
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