Quarterly report pursuant to Section 13 or 15(d)

Stock-Based Compensation (Details 2)

v2.4.0.8
Stock-Based Compensation (Details 2) (USD $)
9 Months Ended 0 Months Ended
Sep. 30, 2014
Sep. 30, 2014
Restricted stock awards
Apr. 01, 2014
Restricted stock units
Subsequent event
Minimum
Apr. 01, 2014
Restricted stock units
Subsequent event
Maximum
Number of shares        
Total granted and unvested at the beginning of the period (in shares)   45,093    
Granted (in shares)   1,954,815    
Vested (in shares) (139)      
Forfeited (in shares)   (4,549)    
Total awarded and unvested at the end of the period (in shares)   1,995,220    
Weighted average grant date fair value        
Total granted and unvested at the beginning of the period (in dollars per share)   $ 54.27    
Granted (in dollars per share)   $ 64.92    
Vested (in dollars per share) $ 53.52      
Forfeited (in dollars per share)   $ 59.60    
Total awarded and unvested at the end of the period (in dollars per share)   $ 64.74    
Aggregate intrinsic value        
Total awarded and unvested at the beginning of the period   $ 2,861,000    
Granted   107,300,000    
Vested (8,000)      
Forfeited   (250,000)    
Total awarded and unvested at the end of the period   109,518,000    
Unrecognized stock-based compensation expense $ 111,800,000      
Weighted average period for recognizing unrecognized stock-based compensation expense     3 years 4 years