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Commitments, Contingencies and Other (Details Textual)
$ in Millions
6 Months Ended
Jun. 30, 2016
USD ($)
Jun. 30, 2016
AUD
facility
bed
Jun. 30, 2016
USD ($)
facility
bed
Commitments and Contingencies (Textual) [Abstract]      
Estimated construction capital project cost $ 109.0    
Cost already spent on existing capital projects 6.0    
Remaining capital required for capital projects $ 103.0    
Number of vacant beds at idle facilities marketed to potential customers | bed   3,300 3,300
Number of marketed idle facilities | facility   4 4
Property and Equipment      
Commitments and Contingencies (Textual) [Abstract]      
Carrying values of idle facilities marketed to potential customers     $ 34.6
National Australia Bank Limited | Ravenhall | Non-Recourse Debt      
Commitments and Contingencies (Textual) [Abstract]      
Contributions in aid of construction     84.0
National Australia Bank Limited | Ravenhall | Non-Recourse Debt | Construction Facility      
Commitments and Contingencies (Textual) [Abstract]      
Maximum borrowing capacity   AUD 791,000,000 $ 589.0