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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
Mar. 31, 2013
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]  
Loss from discontinued operations $ (200)
Physician Services
  
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]  
Net revenues 341
Operating costs 532
Gross margin (191)
Direct general and administrative expenses 93
Loss from discontinued operations, before tax (284)
Tax benefit 84
Loss from discontinued operations $ (200)