Quarterly report pursuant to Section 13 or 15(d)

Basis of Presentation and Significant Events - COVID-19 (Details)

v3.21.2
Basis of Presentation and Significant Events - COVID-19 (Details) - USD ($)
3 Months Ended 6 Months Ended 9 Months Ended 12 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Jun. 30, 2020
Sep. 30, 2021
Sep. 30, 2020
Dec. 31, 2020
Adjustments Due to Legislation [Line Items]            
Proceeds from provider relief funds           $ 93,300,000
Government stimulus income (reversal)   $ (44,400,000) $ 44,400,000      
Proceeds from provider relief fund         $ 0  
Provider relief funds returned       $ 93,300,000    
Contract liabilities - deferred revenue $ 176,333,000     176,333,000   $ 317,962,000
Recoupment of fund       141,600,000    
Net service revenue 565,451,000 530,684,000   1,636,193,000 1,530,875,000  
Sequestration Payment Adjustment            
Adjustments Due to Legislation [Line Items]            
Net service revenue 6,800,000 6,500,000   19,700,000 11,500,000  
Suspension of LTACH            
Adjustments Due to Legislation [Line Items]            
Net service revenue 5,700,000 $ 6,400,000   18,200,000 $ 11,100,000  
Due From Legislation            
Adjustments Due to Legislation [Line Items]            
Employee-related liabilities 51,800,000     51,800,000    
Due From Legislation | Other Current Liabilities            
Adjustments Due to Legislation [Line Items]            
Employee-related liabilities 25,900,000     25,900,000    
Due From Legislation | Other Noncurrent Liabilities            
Adjustments Due to Legislation [Line Items]            
Employee-related liabilities $ 25,900,000     $ 25,900,000