Quarterly report pursuant to Section 13 or 15(d)

Stock-Based Compensation (Narrative) (Details)

v2.4.0.6
Stock-Based Compensation (Narrative) (Details) (USD $)
In Thousands, except Share data, unless otherwise specified
9 Months Ended
Sep. 30, 2012
Y
Sep. 30, 2011
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 $ 11,033  
Weighted average period of recognition of unrecognized costs related to stock options, years 2.51  
Restricted stock units granted (in shares) 183,816 145,768
Stock Option [Member]
   
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]    
Stock options granted (in shares) 358,169 340,973
Unrecognized costs related to share based compensation $ 6,234  
Weighted average period of recognition of unrecognized costs related to stock options, years 2.41