Revenue Recognition - Schedule of Disaggregation of Revenue from Contracts with Customers (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Disaggregation of Revenue [Line Items]
Revenues	$ 1,132,924	$ 1,065,480	$ 1,131,686
U.S. Higher Education
Disaggregation of Revenue [Line Items]
Revenues	818,953	770,979	829,270
U.S. Higher Education | Tuition, net of discounts, grants and scholarships
Disaggregation of Revenue [Line Items]
Revenues	784,066	738,050	795,266
U.S. Higher Education | Other
Disaggregation of Revenue [Line Items]
Revenues	34,887	32,929	34,004
Australia / New Zealand
Disaggregation of Revenue [Line Items]
Revenues	233,518	230,747	250,124
Australia / New Zealand | Tuition, net of discounts, grants and scholarships
Disaggregation of Revenue [Line Items]
Revenues	226,393	224,400	245,791
Australia / New Zealand | Other
Disaggregation of Revenue [Line Items]
Revenues	7,125	6,347	4,333
Education Technology Services
Disaggregation of Revenue [Line Items]
Revenues	$ 80,453	$ 63,754	$ 52,292