Revenue Recognition - Changes in Deferred Revenue Balances (Detail) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2024	Mar. 31, 2023
Deferred Revenue Arrangement [Line Items]
Gross deferred revenue, beginning balance		$ 63,970	$ 107,200
Revenue earned from prior balances		(52,747)	(84,465)
Billings during period	[1]	222,654	153,144
Revenue earned for new billings during the period		(114,251)	(108,854)
Other adjustments		(687)	(1,193)
Gross deferred revenue, ending balance		118,939	65,832
University Group [Member] | CTU [Member]
Deferred Revenue Arrangement [Line Items]
Gross deferred revenue, beginning balance		42,531	67,245
Revenue earned from prior balances		(35,052)	(54,712)
Billings during period	[1]	152,877	100,012
Revenue earned for new billings during the period		(77,728)	(68,709)
Other adjustments		(308)	(1,464)
Gross deferred revenue, ending balance		82,320	42,372
University Group [Member] | AIUS [Member]
Deferred Revenue Arrangement [Line Items]
Gross deferred revenue, beginning balance		21,439	39,955
Revenue earned from prior balances		(17,695)	(29,753)
Billings during period	[1]	69,777	53,132
Revenue earned for new billings during the period		(36,523)	(40,145)
Other adjustments		(379)	271
Gross deferred revenue, ending balance		$ 36,619	$ 23,460

[1] Billings during period includes adjustments for prior billings.