Segment Reporting - Summary Financial Information by Reporting Segment (Detail) - USD ($) $ in Thousands		3 Months Ended			6 Months Ended
		Jun. 30, 2023		Jun. 30, 2022	Jun. 30, 2023		Jun. 30, 2022	Dec. 31, 2022
Segment Reporting Information [Line Items]
Revenue		$ 186,564		$ 167,684	$ 382,162		$ 350,643
Percentage of total revenue		100.00%		100.00%	100.00%		100.00%
Operating Income (Loss)		$ 48,094		$ 33,946	$ 91,430		$ 77,639
Total Assets	[1]	1,013,670			1,013,670			$ 957,368
Corporate and Other [Member]
Segment Reporting Information [Line Items]
Revenue		$ 210		$ 303	$ 476		$ 582
Percentage of total revenue		0.10%		0.20%	0.10%		0.20%
Operating Income (Loss)		$ (9,435)		$ (9,795)	$ (21,792)		$ (18,651)
Total Assets	[1]	560,891			560,891			523,915
CTU [Member] | University Group [Member]
Segment Reporting Information [Line Items]
Revenue	[2]	$ 119,292	[3]	$ 100,461	$ 243,784	[3]	$ 213,609
Percentage of total revenue	[2]	64.00%		59.90%	63.80%		60.90%
Operating Income (Loss)	[2]	$ 40,451		$ 33,008	$ 84,141		$ 76,034
Total Assets	[1]	263,381			263,381			247,510
AIUS [Member] | University Group [Member]
Segment Reporting Information [Line Items]
Revenue	[4]	$ 67,062	[5]	$ 66,920	$ 137,902	[5]	$ 136,452
Percentage of total revenue	[4]	35.90%		39.90%	36.10%		38.90%
Operating Income (Loss)	[4]	$ 17,078		$ 10,733	$ 29,081		$ 20,256
Total Assets	[1]	$ 189,398			$ 189,398			$ 185,943

[1] Total assets are presented on a condensed consolidated basis and do not include intercompany receivable or payable activity between institutions and corporate and investments in subsidiaries.

[2] CTU results of operations include the Coding Dojo acquisition commencing on the December 1, 2022 date of acquisition.

[3] CTU includes revenue related to an acquisition completed on December 1, 2022.

[4] AIUS results of operations include the CalSouthern acquisition commencing on the July 1, 2022 date of acquisition.

[5] AIUS includes revenue related to an acquisition completed on July 1, 2022.