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Segment Reporting Segment Reporting - Textuals (Details)
Dec. 31, 2018
state
location
facilities
Segment Reporting Information [Line Items]  
Number of states in which Entity operates | state 36
Inpatient Rehabilitation Segment [Member]  
Segment Reporting Information [Line Items]  
Number of states in which Entity operates | state 32
Number of inpatient rehabilitation hospitals 130
Number of Joint Venture hospitals accounted for using equity method of accounting 1
Number of solely owned inpatient rehabilitation hospitals 85
Number of jointly owned inpatient rehabilitation hospitals 45
Number of inpatient rehabilitation units under management contracts 5
Home Health and Hospice Segment [Member]  
Segment Reporting Information [Line Items]  
Number of states in which Entity operates | state 30
Number of Hospital Based Home Health and Hospice Agencies | location 278
Number of Joint Venture Agencies Accounted for Using the Equity Method 2
Number of solely owned hospital based home health and hospice locations | location 270
Number of jointly owned hospital based home health and hospice locations | location 8
Minimum [Member] | Inpatient Rehabilitation Segment [Member]  
Segment Reporting Information [Line Items]  
Joint venture ownership percentage 50.00%
Minimum [Member] | Home Health and Hospice Segment [Member]  
Segment Reporting Information [Line Items]  
Joint venture ownership percentage 50.00%
Maximum [Member] | Inpatient Rehabilitation Segment [Member]  
Segment Reporting Information [Line Items]  
Joint venture ownership percentage 97.50%
Maximum [Member] | Home Health and Hospice Segment [Member]  
Segment Reporting Information [Line Items]  
Joint venture ownership percentage 81.00%