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Divesture of Business - Schedule of Details of Losses Reported for Physician Services (Detail) (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]      
Tax benefit (provision) $ (3,180) $ (181) $ 1,399
(Loss) income from discontinued operations (5,007) (423) 3,104
Physician Services Business [Member]
      
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]      
Net revenues 864 2,435 5,483
Operating costs 1,537 2,761 702
Gross margin (673) (326) 4,781
Direct general and administrative expenses less proceeds 1,176 278 278
Write off of goodwill and other intangible assets 6,338      
Loss from discontinued operations, before tax (8,187) (604) 4,503
Tax benefit (provision) 3,180 181 (1,399)
(Loss) income from discontinued operations $ (5,007) $ (423) $ 3,104