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Business Acquisition - Additional Information (Detail) - USD ($)
$ in Thousands
May 07, 2020
Mar. 02, 2020
Mar. 31, 2020
Dec. 31, 2019
Business Acquisition [Line Items]        
Goodwill     $ 118,777 $ 87,356
Trident [Member]        
Business Acquisition [Line Items]        
Purchase price   $ 38,100    
Estimated purchase price including subsequent cash payment   44,000    
Estimated fair values of acquired tangible and identifiable intangible assets   53,148    
Estimated fair values of assumed liabilities   9,277    
Goodwill   31,421    
Trident [Member] | Trade Name [Member]        
Business Acquisition [Line Items]        
Estimated fair value of intangible assets   1,000    
Trident [Member] | Student Relationships and Course Curriculum [Member]        
Business Acquisition [Line Items]        
Estimated fair value of intangible assets   9,400    
Trident [Member] | Restricted Cash [Member]        
Business Acquisition [Line Items]        
Amount set aside in escrow account   $ 4,000    
Trident [Member] | Subsequent Event [Member]        
Business Acquisition [Line Items]        
Purchase price $ 6,000