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Business Combinations and Discontinued Operations - Additional information (Detail)
$ in Thousands
 9 Months Ended
Sep. 30, 2022
USD ($)
Number
Sep. 30, 2021
USD ($)
Dec. 31, 2021
USD ($)
Goodwill $ 26,700    
Other intangible assets 2,300    
Income taxes receivable (799) $ 16,391  
Fixed assets 2,200    
Other non-current assets $ 117,723   $ 131,028
Pediatric Gastroenterology And Gynecology practice And Multi Location Pediatric Urgent Care Practice [Member]      
Number of other multi location pediatric urgent care practice acquired | Number 1    
Business acquisition total consideration $ 31,300    
Business acquisition consideration paid in cash 26,500    
Business combination consideration identifiable as current and long term liabilities 4,800    
Pediatric Subspecialty Practice [Member]      
Other non-current assets 100    
Anesthesiology Services Medical Group [Member]      
Increase decrease in valuation allowance deferred tax assets 37,000    
Incremental loss on sale, net 900 19,000  
Income taxes receivable 24,000    
Tax adjustments, sttlements and unusual provisions 9,000    
Increase in deferred tax assets 17,000    
Radiology Services Medical Group [Member]      
Incremental loss on sale, net $ 1,000 $ 3,300