Quarterly report pursuant to Section 13 or 15(d)

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

v3.3.0.814
Stock-Based Awards Stock-Based Awards (Summary of Stock-Based Awards Granted) (Details)
9 Months Ended
Sep. 30, 2015
$ / shares
shares
Stock appreciation rights  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Number of Awards Granted 508,420
Weighted Average per Share Fair Value | $ / shares $ 13.65
Restricted stock units  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Number of Awards Granted 230,118
Weighted Average per Share Fair Value | $ / shares $ 66.22
Employee stock purchase plan options  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Number of Awards Granted 40,239
Weighted Average per Share Fair Value | $ / shares $ 15.07
Stock appreciation rights and stock options due to special dividend  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Number of Awards Granted 343,485
Restricted stock unit dividend equivalents due to special dividend and quarterly dividends  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Number of Awards Granted 102,053
Market stock units related to special dividend  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Number of Awards Granted 15,078