Discontinued Operations (Details) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 12 Months Ended
Jun. 30, 2012
Mar. 31, 2012
Dec. 31, 2011
Sep. 30, 2011
Jun. 30, 2011
Mar. 31, 2011
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Revenue and components of discontinued operations, net of tax                  
Revenue             $ 5,704 $ 18,626 $ 16,965
(Loss) income from discontinued operations before income taxes             (11,942) 595 2,637
Income tax benefit (expense)             4,678 (230) (979)
(Loss) income from discontinued operations             (7,264) 365 1,658
Loss on sale of discontinued operations, before income taxes             (2,416)    
Income tax benefit             586    
Loss on sale of discontinued operations             2,416    
Total ( loss) income from discontinued operations $ (2,392) $ (6,702) $ (101) $ 60 $ 9 $ 397 $ (9,094) $ 365 $ 1,658