Quarterly report pursuant to Section 13 or 15(d)

Stock-Based Compensation (Narrative) (Details)

v2.4.0.8
Stock-Based Compensation (Narrative) (Details) (USD $)
In Thousands, except Share data, unless otherwise specified
9 Months Ended
Sep. 30, 2013
Sep. 30, 2012
Restricted Stock Units [Member]
   
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]    
Unrecognized costs related to share based compensation $ 11,331  
Weighted average period of recognition of unrecognized costs related to stock options, years 2 years 6 months  
Restricted stock units granted (in shares) 147,590 183,816
Stock Option [Member]
   
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]    
Stock options granted (in shares) 342,358 358,169
Unrecognized costs related to share based compensation $ 6,414  
Weighted average period of recognition of unrecognized costs related to stock options, years 2 years 5 months 12 days