Revenue Recognition - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Disaggregation of Revenue [Line Items]
Revenues	$ 256,606	$ 258,855
U.S. Higher Education Segment
Disaggregation of Revenue [Line Items]
Revenues	196,895	195,766
U.S. Higher Education Segment | Tuition, net of discounts, grants and scholarships
Disaggregation of Revenue [Line Items]
Revenues	188,780	187,355
U.S. Higher Education Segment | Other
Disaggregation of Revenue [Line Items]
Revenues	8,115	8,411
Australia/New Zealand Segment
Disaggregation of Revenue [Line Items]
Revenues	41,503	48,512
Australia/New Zealand Segment | Tuition, net of discounts, grants and scholarships
Disaggregation of Revenue [Line Items]
Revenues	40,422	47,536
Australia/New Zealand Segment | Other
Disaggregation of Revenue [Line Items]
Revenues	1,081	976
Education Technology Services Segment
Disaggregation of Revenue [Line Items]
Revenues	$ 18,208	$ 14,577