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Acquisitions of Non-controlling Interests - Additional Information (Detail) (USD $)
 6 Months Ended
Jun. 30, 2013
Partnership
Transactions
Feb. 28, 2013
May 22, 2012
Business Acquisition [Line Items]      
Number of separate transactions to purchase partnership interest 6    
Number of partnership in which interest acquired 5    
Purchase price for additional non controlling interest $ 1,200,000    
Undistributed earnings 97,000    
Consolidation less than wholly owned subsidiary parent ownership interest amount changes purchase consideration charge from undistributed earning 1,100,000    
Future tax benefits 415,000    
Aggregate losses attributable to non controlling interest 37,000    
Aggregate losses tax effect attributable to non controlling interest 14,000    
Consolidation less than wholly owned subsidiary parent ownership interest changes sale of interest percent by parent 1.00%    
Proceeds from divestiture of interest in consolidated subsidiaries 112,000    
Percentage of purchase of non controlling interest 100.00% 100.00% 70.00%
Income tax effects on sale of interest in partnership 34,000    
Business acquisition, cost of acquired entity 95,000 5,000  
STAR Physical Therapy, LP [Member]
      
Business Acquisition [Line Items]      
Undistributed earnings 55,000    
Percentage of purchase of non controlling interest 1.30%    
Business acquisition, cost of acquired entity $ 801,640    
Minimum [Member]
      
Business Acquisition [Line Items]      
Percentage of purchase of non controlling interest 0.10%    
Maximum [Member]
      
Business Acquisition [Line Items]      
Percentage of purchase of non controlling interest 35.00%