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Acquisitions and Dispositions of Businesses (Dispositions and Other) (Narrative) (Details) - USD ($)
$ in Thousands
1 Months Ended 3 Months Ended 9 Months Ended
Jun. 30, 2016
Sep. 30, 2017
Sep. 30, 2016
Sep. 30, 2017
Sep. 30, 2016
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]          
Gain on the formation of a joint venture   $ 0 $ 0 $ 0 $ 3,232
Celtic Healthcare Inc [Member]          
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]          
Noncontrolling interest exchanged 20.00%        
Celtic Healthcare Inc [Member] | Celtic Healthcare Allegheny Health Network Joint Venture [Member]          
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]          
Ownership percentage of joint venture   40.00%   40.00%  
Residential Healthcare [Member]          
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]          
Noncontrolling interest purchased 20.00%        
Change in redemption value of manditorily redeemable noncontrolling interest $ 3,000        
Redemption value of redeemable noncontrolling interest $ 24,000        
Residential Healthcare [Member] | Residential Healthcare Michigan hospital joint venture [Member]          
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]          
Percentage of joint venture sold 60.00%        
Ownership percentage of joint venture 40.00%        
Gain on the formation of a joint venture $ 3,200        
Graham Healthcare Group [Member]          
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]          
Change in redemption value of manditorily redeemable noncontrolling interest $ 4,100        
Ownership percentage of manditorily redeemable noncontrolling interest by noncontrolling owners 10.00%        
Ownership oercentage by parent   90.00%   90.00%