Quarterly report pursuant to Section 13 or 15(d)

Stock-Based Compensation (Narrative) (Details)

v3.7.0.1
Stock-Based Compensation (Narrative) (Details) - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2017
Mar. 31, 2016
Share-based Compensation [Abstract]    
Stock-based compensation expense $ 2.6 $ 3.3
Capitalized stock-based compensation 1.0 $ 1.3
Unrecognized compensation expense $ 18.1  
Weighted average period of expense recognition period 1 year 7 months 28 days