XML 20 R57.htm IDEA: XBRL DOCUMENT v2.4.0.6
Stock-Based Compensation (Details 2) (Restricted stock units)
6 Months Ended
Jun. 30, 2012
Jun. 30, 2011
Restricted stock units
   
Restricted stock units    
Restricted stock units at the beginning of the period (in shares) 657,825 727,317
Shares awarded 400,568 305,000
Shares vested (350,349) (304,492)
Shares forfeited (6,667) (60,000)
Restricted stock units at the end of the period (in shares) 701,377 667,825
Outstanding restricted shares vesting schedule    
Outstanding restricted stock unit awards, vesting in 2013 (in shares) 344,189  
Outstanding restricted stock unit awards, vesting in 2014 (in shares) 235,188  
Outstanding restricted stock unit awards, vesting in 2015 (in shares) 122,000