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Business Combinations and Discontinued Operations - Additional information (Detail)
$ in Thousands
 3 Months Ended
Mar. 31, 2022
USD ($)
Number
Mar. 31, 2021
USD ($)
Goodwill $ 23,300  
Other intangible assets 1,000  
Increase in income tax receivable 17,216 $ (18,501)
Fixed assets $ 1,700  
Pediatric Orthopedic 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 $ 26,000  
Business acquisition consideration paid in cash 24,000  
Business combination consideration identifiable as current and long term liabilities 2,000  
North American Partners In Anesthesia [Member]    
Increase decrease in valuation allowance deferred tax assets 65,000  
Increase in income tax receivable 18,000  
Tax adjustments, sttlements and unusual provisions 7,000  
Increase in deferred tax assets $ 13,000  
Anesthesiology Services Medical Group [Member]    
Incremental loss on sale, net   $ 12,300