Commitments and Contingencies (Details) (USD $)
In Millions, unless otherwise specified
0 Months Ended 3 Months Ended 0 Months Ended
Mar. 23, 2015
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state
Mar. 31, 2015
Jan. 08, 2013
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Commitments and Contingencies      
Outstanding commitments under construction contracts   $ 67.5  
Concentra Inc      
Commitments and Contingencies      
Minimum number of medical centers operates 300    
Number of onsite clinics operates 170    
Number of states in which the entity had facilities 40    
MJ Acquisition Corporation | Concentra Inc      
Commitments and Contingencies      
Purchase price 1,055    
Reverse termination fee if there is a failure of the debt financing to be funded in accordance with its terms 60.0    
MJ Acquisition Corporation | Select      
Commitments and Contingencies      
Percentage of ownership 50.10%    
MJ Acquisition Corporation | Welsh Carson Anderson And Stowe Xiilp      
Commitments and Contingencies      
Percentage of ownership 49.90%    
Professional liability claims      
Commitments and Contingencies      
Self insurance retention per occurrence   2.0  
General liability claims      
Commitments and Contingencies      
Self insurance retention per occurrence   $ 2.0  
Amended complaint | SSH-Evansville      
Commitments and Contingencies      
Number of case managers identified as plaintiff     2
Number of physicians named as defendants     2
Number of days the deadlines have been stayed from the Magistrate judge     90 days