Revenue Recognition - Changes in Deferred Revenue Balances (Detail) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Deferred Revenue Arrangement [Line Items]
Gross deferred revenue, beginning balance		$ 118,939	$ 65,832	$ 63,970	$ 107,200
Revenue earned from prior balances		(99,456)	(52,468)	(56,901)	(90,899)
Billings during period	[1]	136,487	222,436	359,141	375,580
Revenue earned for new billings during the period		(65,948)	(132,052)	(275,501)	(286,940)
Other adjustments		763	955	76	(238)
Gross deferred revenue, ending balance		90,785	104,703	90,785	104,703
University Group [Member] | CTU [Member]
Deferred Revenue Arrangement [Line Items]
Gross deferred revenue, beginning balance		82,320	42,372	42,531	67,245
Revenue earned from prior balances		(69,946)	(32,859)	(37,248)	(58,404)
Billings during period	[1]	97,465	148,118	250,342	248,130
Revenue earned for new billings during the period		(42,030)	(85,425)	(187,508)	(183,301)
Other adjustments		71	496	(237)	(968)
Gross deferred revenue, ending balance		67,880	72,702	67,880	72,702
University Group [Member] | AIUS [Member]
Deferred Revenue Arrangement [Line Items]
Gross deferred revenue, beginning balance		36,619	23,460	21,439	39,955
Revenue earned from prior balances		(29,510)	(19,609)	(19,653)	(32,495)
Billings during period	[1]	39,022	74,318	108,799	127,450
Revenue earned for new billings during the period		(23,918)	(46,627)	(87,993)	(103,639)
Other adjustments		692	459	313	730
Gross deferred revenue, ending balance		$ 22,905	$ 32,001	$ 22,905	$ 32,001

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