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Business Acquisitions - Summary of Preliminary Fair Values of Assets Acquired and Liabilities Assumed (Detail) - USD ($)
$ in Thousands
Sep. 30, 2022
Jul. 01, 2022
Dec. 31, 2021
Intangible assets subject to amortization      
Goodwill $ 184,135   $ 162,579
California Southern University [Member]      
Business Acquisition [Line Items]      
Student receivables   $ 3,214  
Prepaid assets   290  
Intangible assets subject to amortization      
Goodwill   21,556  
Total assets acquired   42,460  
Accounts payable   4  
Deferred revenue   2,419  
Total liabilities assumed   2,423  
Net assets acquired   40,037  
Customer Relationship [Member] | California Southern University [Member]      
Intangible assets subject to amortization      
Fair value of intangible assets   14,530  
Trade Names [Member] | California Southern University [Member]      
Intangible assets subject to amortization      
Fair value of intangible assets   1,480  
Course Curriculum | California Southern University [Member]      
Intangible assets subject to amortization      
Fair value of intangible assets   $ 1,390