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Long Term Compensation Plan and Stock Based Compensation (Details) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 9 Months Ended
Sep. 30, 2012
Sep. 30, 2011
Sep. 30, 2012
Sep. 30, 2011
Details of long-term compensation plan and stock-based compensation expense        
Restricted stock $ 356 $ 436 $ 2,060 $ 1,182
Long-term compensation plan 144 455 688 1,025
Total Non-Cash Compensation $ 500 $ 891 $ 2,748 $ 2,207