Revenue Recognition - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Disaggregation of Revenue [Line Items]
Revenues	$ 263,123	$ 270,078	$ 795,542	$ 859,587
U.S. Higher Education Segment
Disaggregation of Revenue [Line Items]
Revenues	185,499	191,893	571,291	630,647
U.S. Higher Education Segment | Tuition, net of discounts, grants and scholarships
Disaggregation of Revenue [Line Items]
Revenues	177,678	184,126	546,407	605,036
U.S. Higher Education Segment | Other
Disaggregation of Revenue [Line Items]
Revenues	7,821	7,767	24,884	25,611
Australia/New Zealand Segment
Disaggregation of Revenue [Line Items]
Revenues	61,177	65,224	177,232	190,549
Australia/New Zealand Segment | Tuition, net of discounts, grants and scholarships
Disaggregation of Revenue [Line Items]
Revenues	60,238	64,456	173,621	187,018
Australia/New Zealand Segment | Other
Disaggregation of Revenue [Line Items]
Revenues	939	768	3,611	3,531
Education Technology Services Segment
Disaggregation of Revenue [Line Items]
Revenues	$ 16,447	$ 12,961	$ 47,019	$ 38,391