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Revenue Recognition - Changes in Deferred Revenue Balances (Detail) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2024
Sep. 30, 2023
Sep. 30, 2024
Sep. 30, 2023
Deferred Revenue Arrangement [Line Items]        
Gross deferred revenue, beginning balance $ 90,785 $ 104,703 $ 63,970 $ 107,200
Revenue earned from prior balances (76,801) (84,783) (58,553) (92,624)
Billings during period [1] 160,127 154,491 519,268 530,071
Revenue earned for new billings during the period (91,641) (93,476) (442,291) (463,474)
Other adjustments (263) (2,195) (187) (2,433)
Gross deferred revenue, ending balance 82,207 78,740 82,207 78,740
University Group [Member] | CTU [Member]        
Deferred Revenue Arrangement [Line Items]        
Gross deferred revenue, beginning balance 67,880 72,702 42,531 67,245
Revenue earned from prior balances (57,850) (59,047) (38,122) (59,458)
Billings during period [1] 100,352 95,064 350,694 343,194
Revenue earned for new billings during the period (56,987) (60,326) (301,471) (301,620)
Other adjustments (162) (1,283) (399) (2,251)
Gross deferred revenue, ending balance 53,233 47,110 53,233 47,110
University Group [Member] | AIUS [Member]        
Deferred Revenue Arrangement [Line Items]        
Gross deferred revenue, beginning balance 22,905 32,001 21,439 39,955
Revenue earned from prior balances (18,951) (25,736) (20,431) (33,166)
Billings during period [1] 59,775 59,427 168,574 186,877
Revenue earned for new billings during the period (34,654) (33,150) (140,820) (161,854)
Other adjustments (101) (912) 212 (182)
Gross deferred revenue, ending balance $ 28,974 $ 31,630 $ 28,974 $ 31,630
[1] Billings during period includes adjustments for prior billings.