Quarterly report pursuant to Section 13 or 15(d)

Stock-Based Compensation (Narrative) (Details)

v3.5.0.2
Stock-Based Compensation (Narrative) (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2016
Sep. 30, 2015
Sep. 30, 2016
Sep. 30, 2015
Share-based Compensation [Abstract]        
Stock-based compensation expense $ 3.0 $ 3.9 $ 9.6 $ 10.6
Capitalized stock-based compensation 1.2 $ 1.5 3.8 $ 4.2
Unrecognized compensation expense $ 18.4   $ 18.4  
Weighted average period of expense recognition (in years)     1 year 8 months 20 days