General (Details 2) (USD $)
3 Months Ended 6 Months Ended 1 Months Ended 6 Months Ended
Jun. 30, 2012
Jun. 30, 2011
Jun. 30, 2012
Jun. 30, 2011
Mar. 31, 2012
Reduction in estimated bonus
Jun. 30, 2012
Reduction in estimated bonus
Change in estimates            
Reduction in estimated bonus         $ 1,100,000  
Income from continuing operations 518,000 10,498,000 1,797,000 23,386,000   600,000
Net income $ (271,000) $ 10,213,000 $ 717,000 $ 22,892,000   $ 600,000
Diluted earnings per share (in dollars per share) $ (0.01) $ 0.37 $ 0.03 $ 0.82   $ 0.02