Quarterly report pursuant to Section 13 or 15(d)

Summary of Significant Accounting Policies-Share-based Compensation (Details)

v2.4.0.8
Summary of Significant Accounting Policies-Share-based Compensation (Details) (USD $)
In Thousands, unless otherwise specified
3 Months Ended
Mar. 31, 2014
Mar. 31, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Share-based Compensation $ 718 $ 671
Stock Options
   
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Non-vested stock options unrecognized compensation expense $ 5,425  
Non-vested stock options unrecognized compensation expense, weighted-average period of recognition 2 years 10 months 13 days