Quarterly report pursuant to Section 13 or 15(d)

Share-Based Compensation (Details Textual)

Share-Based Compensation (Details Textual) (USD $)
In Millions, unless otherwise specified
9 Months Ended
Sep. 30, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Weighted average period of recognition of unrecognized compensation expense 2 years 4 months 24 days
Share-Based Compensation (Textual) [Abstract]  
Unrecognized compensation expense related to unvested portion of stock options $ 8.7