Segment and Geographic Information - Schedule of Financial Information by Reportable Segment (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Revenues
Revenues	$ 1,132,924	$ 1,065,480	$ 1,131,686
Income from operations
Income from operations	95,321	70,760	73,912
Amortization of intangible assets	(11,457)	(14,350)	(51,495)
Merger and integration costs	(1,544)	(1,117)	(11,201)
Restructuring costs	(16,256)	(2,115)	(25,472)
Segments
Revenues
Revenues	1,132,924	1,065,480	1,131,686
Segment Reconciling Items
Income from operations
Amortization of intangible assets	(11,457)	(14,350)	(51,495)
Merger and integration costs	(1,544)	(1,117)	(11,201)
Restructuring costs	(16,256)	(2,115)	(25,472)
U.S. Higher Education
Revenues
Revenues	818,953	770,979	829,270
U.S. Higher Education | Segments
Revenues
Revenues	818,953	770,979	829,270
Income from operations
Income from operations	59,628	38,605	104,914
Australia / New Zealand
Revenues
Revenues	233,518	230,747	250,124
Australia / New Zealand | Segments
Revenues
Revenues	233,518	230,747	250,124
Income from operations
Income from operations	35,862	30,473	35,855
Education Technology Services
Revenues
Revenues	80,453	63,754	52,292
Education Technology Services | Segments
Revenues
Revenues	80,453	63,754	52,292
Income from operations
Income from operations	$ 29,088	$ 19,264	$ 21,311