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Revenue Recognition - Changes in Deferred Revenue Balances (Detail) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Deferred Revenue Arrangement [Line Items]    
Gross deferred revenue, beginning balance $ 63,970 $ 107,200
Business acquisitions, beginning balance 10,137  
Revenue earned from prior balances (70,484) (93,526)
Billings during period [1] 662,774 661,843
Revenue earned for new billings during the period (605,587) (609,394)
Other adjustments 481 (2,153)
Gross deferred revenue, ending balance 61,291 63,970
University Group [Member] | CTU [Member]    
Deferred Revenue Arrangement [Line Items]    
Gross deferred revenue, beginning balance 42,531 67,245
Revenue earned from prior balances (39,594) (60,232)
Billings during period [1] 452,205 443,022
Revenue earned for new billings during the period (414,056) (404,588)
Other adjustments (1,004) (2,916)
Gross deferred revenue, ending balance 40,082 42,531
University Group [Member] | AIUS [Member]    
Deferred Revenue Arrangement [Line Items]    
Gross deferred revenue, beginning balance 21,439 39,955
Revenue earned from prior balances (20,854) (33,294)
Billings during period [1] 210,569 218,821
Revenue earned for new billings during the period (191,531) (204,806)
Other adjustments 18 763
Gross deferred revenue, ending balance 19,641 $ 21,439
University Group [Member] | USAHS [Member]    
Deferred Revenue Arrangement [Line Items]    
Business acquisitions, beginning balance [2] 10,137  
Revenue earned from prior balances [2] (10,036)  
Other adjustments [2] 1,467  
Gross deferred revenue, ending balance [2] $ 1,568  
[1] Billings during period includes adjustments for prior billings.
[2] USAHS includes deferred revenue starting from the acquisition date on December 2, 2024.