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Discontinued Operations - Schedule of Details of Losses Reported for Physician Services (Detail) (USD $)
In Thousands, unless otherwise specified
 3 Months Ended 9 Months Ended
Sep. 30, 2013
Sep. 30, 2012
Sep. 30, 2013
Sep. 30, 2012
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]        
Loss from discontinued operations $ (4,497) $ (104) $ (4,965) $ (184)
Physician Services Business [Member]
        
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]        
Net revenues 168 750 864 2,123
Operating costs 369 822 1,537 2,157
Gross margin (201) (72) (673) (34)
Direct general and administrative expenses less proceeds 989 71 1,176 210
Write off of goodwill and other intangible assets 6,338    6,338   
Loss from discontinued operations, before tax (7,528) (143) (8,187) (244)
Tax benefit 3,031 39 3,222 60
Loss from discontinued operations $ (4,497) $ (104) $ (4,965) $ (184)