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
6 Months Ended
Jun. 30, 2013
Jun. 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 $ 12,767  
Weighted average period of recognition of unrecognized costs related to stock options, years 2 years 8 months 23 days  
Restricted stock units granted (in shares) 144,477 159,097
Stock Option [Member]
   
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]    
Stock options granted (in shares) 327,979 354,934
Unrecognized costs related to share based compensation $ 7,178  
Weighted average period of recognition of unrecognized costs related to stock options, years 2 years 8 months 5 days