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Investment in and Notes Receivable from CareCentrix (Details Textual) (USD $)
3 Months Ended 6 Months Ended 0 Months Ended 12 Months Ended
Jun. 30, 2013
Dec. 31, 2012
Jun. 30, 2012
Jun. 30, 2013
Jun. 30, 2012
Aug. 24, 2012
Sep. 30, 2011
Dec. 31, 2012
CareCentrix [Member]
Aug. 24, 2012
Escrow fund, reclass to note receivable [Member]
Dec. 31, 2012
Escrow fund, indemnified claims [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]                    
Promissory note $ 25,000,000     $ 25,000,000            
Investment maturity date       Mar. 19, 2017            
Fixed interest rate on promissory note       10.00%            
Investment income, nonoperating 625,000   625,000 1,250,000 1,250,000          
Escrow fund receivable             10,600,000      
Reduction in escrow fund receivable                 9,900,000 700,000
Seller financing note receivable from CareCentrix 3,400,000     3,400,000   9,900,000        
Interest rate on promissory note       18.00%            
Increase (decrease) in notes receivable, current   6,500,000                
Equity method investment in CareCentrix at cost               $ 900,000