v2.4.0.8
Summary of Transactions in Stock-Based Compensation Plans (Details) (USD $)
3 Months Ended
Mar. 31, 2014
Mar. 31, 2014
Shares Available For Grant
Mar. 31, 2014
RSUs
Mar. 31, 2014
Restricted Stock
Dec. 31, 2013
Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Including Options, Shares Available for Grant [Roll Forward]          
Balance, beginning of period   13,965,440      
Granted   (718,756)      
Cancelled   60,326      
Balance, end of period   13,307,010      
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]          
Balance, beginning of period 6,832,331        
Granted 126,755        
Exercised (482,844)        
Cancelled (31,800)        
Balance, end of period 6,444,442        
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Roll Forward]          
Balance, weighted average exercise price, beginning of period $ 7.04        
Granted, weighted average exercise price $ 32.31        
Exercised, weighted average exercise price $ 4.92        
Cancelled, weighted average exercise price $ 7.56        
Balance, weighted average exercise price, end of period $ 7.69        
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Roll Forward]          
Balance, weighted average grant date fair value, beginning of period     $ 16.63 $ 9.30 $ 9.30
Granted, weighted average grant date fair value     $ 32.31    
Vested, weighted average grant date fair value     $ 16.11    
Cancelled, weighted average grant date fair value     $ 17.61    
Balance, weighted average grant date fair value, end of period     $ 20.29 $ 9.30 $ 9.30
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]          
Balance, beginning of period     2,558,213 20,000 20,000
Granted     592,001    
Vested     (523,269)    
Cancelled     (28,526)    
Balance, end of period     2,598,419 20,000 20,000