Quarterly report pursuant to Section 13 or 15(d)

Stock-Based Awards Stock-Based Awards (Summary of Stock-Based Awards Granted) (Details)

v2.4.0.8
Stock-Based Awards Stock-Based Awards (Summary of Stock-Based Awards Granted) (Details) (USD $)
3 Months Ended
Mar. 31, 2014
Stock appreciation rights
 
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Number of Awards Granted 404,141
Weighted Average per Share Fair Value $ 15.17
Restricted stock units
 
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Number of Awards Granted 204,330
Weighted Average per Share Fair Value $ 55.04
Employee stock purchase plan options
 
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Number of Awards Granted 21,776
Weighted Average per Share Fair Value $ 12.85