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Discontinued Operations - Summary of Revenues and Pretax Profits (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2014
Sep. 30, 2014
Discontinued Operations and Disposal Groups [Abstract]    
Net service revenues $ 8,723 $ 56,670
Income from discontinued operations, before income taxes $ 95,917 $ 103,512