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Discontinued Operations - Summary of Revenues and Pretax Profits (Details) (USD $)
In Thousands, unless otherwise specified
3 Months Ended
Mar. 31, 2014
Discontinued Operations and Disposal Groups [Abstract]  
Net service revenues $ 23,288us-gaap_DisposalGroupIncludingDiscontinuedOperationRevenue
Income from discontinued operations, before income taxes $ 3,065us-gaap_DiscontinuedOperationIncomeLossFromDiscontinuedOperationBeforeIncomeTax