Quarterly report pursuant to Section 13 or 15(d)

Stock-Based Awards (Narrative) (Details)

v3.7.0.1
Stock-Based Awards (Narrative) (Details) - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2017
Jan. 27, 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Unrecognized compensation cost $ 38.5  
Weighted average period of recognition of unrecognized compensation cost, years 2 years 4 months  
New awards authorized 8,800,000.0 8,000,000.0
Available for grants 500,000  
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 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 200.00%  
Performance Shares    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Number of Awards Granted (in shares) 96,439  
Performance Shares | Maximum [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Number of Awards Granted (in shares) 192,878  
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage 200.00%