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Discontinued Operations Results of Operations for Discontinued Operations (Details) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
--- | ---
Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2010
Discontinued Operations and Disposal Groups [Abstract] |  |  |
Revenue |  |  | $ 686
Income before income tax provision |  |  | 355
Income tax provision |  |  | 131
Income from discontinued operations, net of taxes, before gain on sale of discontinued operations | 0 | 0 | 224
Gain on sale of discontinued operations, net of taxes | 0 | 0 | 1,729
Income from discontinued operations, net of taxes | $ 0 | $ 0 | $ 1,953

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