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Business Combinations - Textual (Details)	Jun. 01, 2021 USD ($) location	Sep. 30, 2021 USD ($)	Jul. 31, 2021 bed	Jun. 30, 2021 bed	Apr. 30, 2021 bed
Inpatient Rehabilitation Segment | Shannon Medical | Corporate Joint Venture
Business Acquisition [Line Items]
Business acquisition percentage of voting interests acquired					51.00%
Number of beds acquired					14
Inpatient Rehabilitation Segment | Heritage Valley Health System, Inc | Corporate Joint Venture
Business Acquisition [Line Items]
Business acquisition percentage of voting interests acquired				75.00%
Number of beds acquired				16
Inpatient Rehabilitation Segment | ECHD | Corporate Joint Venture
Business Acquisition [Line Items]
Business acquisition percentage of voting interests acquired			65.00%
Number of beds acquired			22
Inpatient Rehabilitation Segment | Shannon Medical, Heritage Valley Health System And ECHD Ventures
Business Acquisition [Line Items]
Goodwill expected to be tax-deductible amount | $		$ 0
Home Health and Hospice
Business Acquisition [Line Items]
Payments to acquire businesses, gross | $	$ 4,000,000
Home Health and Hospice | Heart of the Rockies Home Health | Corporate Joint Venture
Business Acquisition [Line Items]
Equity method investment, ownership percentage	50.00%
Home Health and Hospice | Hospice of Southwest Montana | Corporate Joint Venture
Business Acquisition [Line Items]
Equity method investment, ownership percentage	90.00%
Equity method investment, additional ownership percentage	40.00%
Home Health and Hospice | Home health | Frontier Home Health and Hospice
Business Acquisition [Line Items]
Number of locations | location	9
Home Health and Hospice | Hospice | Frontier Home Health and Hospice
Business Acquisition [Line Items]
Number of locations | location	11

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