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Business Combinations - Additional Information (Detail)
$ in Thousands
 12 Months Ended
Dec. 31, 2022
USD ($)
Number
Dec. 31, 2021
USD ($)
Number
Business Acquisition [Line Items]    
Number of Pediatric Neurology Practices Acquired | Number   2
Number of Maternal Fetal Medicine Practices Acquired | Number   1
Number Of Pediatric Intensivist Practice Acquired | Number   1
Number Of Obstetrics And Gynecology Practices Acquired | Number   1
Business Acquisition, Goodwill, Expected Tax Deductible Amount $ 26,700  
Other intangible assets 2,300  
Fixed assets 2,200  
Number Of Physician Group Practices Acquired | Number   9
Number Of Neonatology Practices Acquired | Number   1
Number Of Pediatric Subspecialty Practices Acquired | Number   1
Number Of Pediatric Cardiology Acquired | Number   1
Other non-current assets 123,176 $ 131,028
Pediatric Gastroenterology And Gynecology practice And Multi Location Pediatric Urgent Care Practice [Member]    
Business Acquisition [Line Items]    
Total business acquisition consideration $ 31,300  
Number of other multi location pediatric urgent care practice acquired | Number 1  
One pediatric gastroenterology practice | Number 1  
Business acquisition consiideration paid in cash $ 26,500  
Business acquisitions contingent consideration liability 4,800  
Pediatric Subspecialty Practice [Member]    
Business Acquisition [Line Items]    
Other non-current assets $ 100  
Multi Location Pediatric Urgent Care Practice [Member]    
Business Acquisition [Line Items]    
Number of other pediatric orthopedic practice acquired | Number   1
Pediatric Orthopedic Multi Location Urgent Care Cardiology Neurology And Maternal Fetal Medicine Practice [Member]    
Business Acquisition [Line Items]    
Total business acquisition consideration   $ 34,900
Goodwill   27,900
Other intangible assets   3,500
Fixed assets   3,500
Business acquisition consiideration paid in cash   29,900
Business acquisitions contingent consideration liability   $ 5,000