Revenue Recognition - Changes in Deferred Revenue Balances (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Deferred Revenue Arrangement [Line Items]
Gross deferred revenue, beginning balance	$ 113,719	$ 85,402
Business acquisitions, beginning balance	12,743	5,356
Revenue earned from prior balances	(98,703)	(74,448)
Billings during period	669,309	710,889
Revenue earned for new billings during the period	(588,969)	(613,967)
Other adjustments	(899)	487
Gross deferred revenue, ending balance	107,200	113,719
University Group [Member] | CTU [Member]
Deferred Revenue Arrangement [Line Items]
Gross deferred revenue, beginning balance	64,674	28,522
Business acquisitions, beginning balance	10,324	3,952
Revenue earned from prior balances	(59,520)	(27,857)
Billings during period	408,796	439,836
Revenue earned for new billings during the period	(356,843)	(378,926)
Other adjustments	(186)	(853)
Gross deferred revenue, ending balance	67,245	64,674
University Group [Member] | AIUS [Member]
Deferred Revenue Arrangement [Line Items]
Gross deferred revenue, beginning balance	49,045	56,880
Business acquisitions, beginning balance	2,419	1,404
Revenue earned from prior balances	(39,183)	(46,591)
Billings during period	260,513	271,053
Revenue earned for new billings during the period	(232,126)	(235,041)
Other adjustments	(713)	1,340
Gross deferred revenue, ending balance	$ 39,955	$ 49,045