Segment Reporting - Summary Financial Information by Reporting Segment (Detail) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2024	Mar. 31, 2023	Dec. 31, 2023
Segment Reporting Information [Line Items]
Revenue		$ 168,264	$ 195,598
Percentage of total revenue		100.00%	100.00%
Operating Income (Loss)		$ 46,278	$ 43,336
Total Assets	[1]	1,051,965		$ 1,007,316
Corporate and Other [Member]
Segment Reporting Information [Line Items]
Revenue		$ 190	$ 266
Percentage of total revenue		0.10%	0.10%
Operating Income (Loss)		$ (5,164)	$ (12,357)
Total Assets	[1]	674,750		643,252
CTU [Member] | University Group [Member]
Segment Reporting Information [Line Items]
Revenue		$ 113,569	$ 124,492
Percentage of total revenue		67.50%	63.70%
Operating Income (Loss)		$ 42,156	$ 43,690
Total Assets	[1]	208,317		202,728
AIUS [Member] | University Group [Member]
Segment Reporting Information [Line Items]
Revenue		$ 54,505	$ 70,840
Percentage of total revenue		32.40%	36.20%
Operating Income (Loss)		$ 9,286	$ 12,003
Total Assets	[1]	$ 168,898		$ 161,336

[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.