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Discontinued Operations - Summary of Revenues and Pretax Profits (Details) - Health Information Management - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]    
Net service revenues $ 56,670 $ 78,159
Income from discontinued operations, before income taxes $ 103,512 $ 9,169