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Revenue Recognition - Changes in Deferred Revenue Balances (Detail) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2023
Jun. 30, 2022
Jun. 30, 2023
Jun. 30, 2022
Deferred Revenue Arrangement [Line Items]        
Gross deferred revenue, beginning balance $ 65,832 $ 67,850 $ 107,200 $ 113,719
Revenue earned from prior balances (52,468) (57,208) (90,899) (93,499)
Billings during period [1] 222,436 165,024 375,580 300,220
Revenue earned for new billings during the period (132,052) (108,688) (286,940) (253,724)
Other adjustments 955 507 (238) 769
Gross deferred revenue, ending balance 104,703 67,485 104,703 67,485
University Group [Member] | CTU [Member]        
Deferred Revenue Arrangement [Line Items]        
Gross deferred revenue, beginning balance 42,372 39,343 67,245 64,674
Revenue earned from prior balances (32,859) (33,358) (58,404) (55,433)
Billings during period [1] 148,118 88,990 248,130 175,611
Revenue earned for new billings during the period (85,425) (66,391) (183,301) (156,867)
Other adjustments 496 273 (968) 872
Gross deferred revenue, ending balance 72,702 28,857 72,702 28,857
University Group [Member] | AIUS [Member]        
Deferred Revenue Arrangement [Line Items]        
Gross deferred revenue, beginning balance 23,460 28,507 39,955 49,045
Revenue earned from prior balances (19,609) (23,850) (32,495) (38,066)
Billings during period [1] 74,318 76,034 127,450 124,609
Revenue earned for new billings during the period (46,627) (42,297) (103,639) (96,857)
Other adjustments 459 234 730 (103)
Gross deferred revenue, ending balance $ 32,001 $ 38,628 $ 32,001 $ 38,628
[1] Billings during period includes adjustments for prior billings.