| 
           Stock-based Compensation (Details) (USD $) 
        In Thousands, except Share data, unless otherwise specified  | 
        3 Months Ended | 9 Months Ended | ||
|---|---|---|---|---|
| 
           Sep. 30, 2013 
         | 
        
           Sep. 30, 2012 
         | 
        
           Sep. 30, 2013 
         | 
        
           Sep. 30, 2012 
         | 
      |
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ||||
| Stock-based compensation cost, net | $ 916 | $ 692 | ||
| 
           Restricted Stock Plan [Member] 
         | 
        ||||
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ||||
| Restricted stock awarded (in shares) | 23,661 | |||
| Stock-based compensation expense | 267 | 225 | 1,200 | 1,000 | 
| 
           Non-employee Directors Stock Plan [Member] 
         | 
        ||||
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ||||
| Restricted stock awarded (in shares) | 16,100 | |||
| Stock-based compensation expense | $ 413 | |||