Segment Reporting - Summary Financial Information by Reporting Segment (Detail) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Segment Reporting Information [Line Items]
Revenue		$ 710,004	$ 695,208	$ 693,034
Operating Income (Loss)		150,446	129,637	149,016
Depreciation and amortization		16,887	19,734	16,766
Capital Expenditures		6,411	12,620	10,453
Total Assets	[1]	1,007,316	957,368
Corporate and Other [Member]
Segment Reporting Information [Line Items]
Revenue		778	1,112	1,125
Operating Income (Loss)		(38,845)	(45,300)	(38,595)
Depreciation and amortization		334	340	333
Capital Expenditures		5,566	7,910	5,838
Total Assets	[1]	643,252	523,915
CTU [Member] | University Group [Member]
Segment Reporting Information [Line Items]
Revenue	[2],[3]	468,926	419,617	408,549
Operating Income (Loss)	[3]	144,008	141,622	148,481
Depreciation and amortization	[3]	11,561	10,069	7,365
Capital Expenditures	[3]	546	3,641	2,949
Total Assets	[1],[3]	202,728	247,510
AIUS [Member] | University Group [Member]
Segment Reporting Information [Line Items]
Revenue	[4],[5]	240,300	274,479	283,360
Operating Income (Loss)	[5]	45,283	33,315	39,130
Depreciation and amortization	[5]	4,992	9,325	9,068
Capital Expenditures	[5]	299	1,069	$ 1,666
Total Assets	[1],[5]	$ 161,336	$ 185,943

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

[2] CTU includes revenue related to an acquisition completed on December 1, 2022 and an acquisition completed on September 10, 2021.

[3] CTU results of operations include the Coding Dojo acquisition commencing on the December 1, 2022 date of acquisition and the Hippo acquisition commencing on the September 10, 2021 date of acquisition.

[4] AIUS includes revenue related to an acquisition completed on July 1, 2022 and an acquisition completed on August 2, 2021.

[5] AIUS results of operations include the CalSouthern acquisition commencing on the July 1, 2022 date of acquisition and the DigitalCrafts acquisition commencing on the August 2, 2021 date of acquisition.