Quarterly report pursuant to Section 13 or 15(d)

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

v3.4.0.3
Stock-Based Awards Stock-Based Awards (Summary of Stock-Based Awards Granted) (Details)
3 Months Ended
Mar. 31, 2016
$ / shares
Rate
shares
Stock appreciation rights  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Number of Awards Granted 928,990
Weighted Average per Share Fair Value | $ / shares $ 7.31
Restricted stock units  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Number of Awards Granted 225,271
Weighted Average per Share Fair Value | $ / shares $ 44.89
Performance share units  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Number of Awards Granted 92,000
Weighted Average per Share Fair Value | $ / shares $ 54.06
Employee stock purchase plan options  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Number of Awards Granted 29,965
Weighted Average per Share Fair Value | $ / shares $ 12.18
Dividend equivalents due to quarterly dividend  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Number of Awards Granted 5,724
Minimum [Member]  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage | Rate 0.00%
Maximum [Member]  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage | Rate 200.00%