Share-based Compensation Plans and Awards - Stock Options Narrative (Details) (USD $)
In Thousands, except Per Share data, unless otherwise specified
3 Months Ended 9 Months Ended
Sep. 30, 2012
Sep. 30, 2012
Sep. 30, 2011
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Closing stock price (usd per share) $ 10.87 $ 10.87  
Total grant date fair value of stock options vested $ 16 $ 5  
Aggregate intrinsic value of all options excerised   13 14
Stock options [Member]
     
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Unrecognized stock-based compensation expense related to non-vested stock options $ 23 $ 23  
Unrecognized stock-based compensation expense, weighted average period of recognition   3 years