Segment and Geographic Information - Schedule of Non-cash items (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Non cash items included in segment income (loss) from operations by reportable segment
Depreciation and amortization	$ 44,378	$ 57,313	$ 63,124
Amortization of intangible assets	0	11,457	14,350
Merger and integration costs	0	336	0
Restructuring costs	182	385	2,480
Restructuring costs	343	507	0
Stock-based compensation	25,571	19,772	21,792
U.S. Higher Education
Non cash items included in segment income (loss) from operations by reportable segment
Depreciation and amortization	31,663	33,655	35,863
Stock-based compensation	19,337	17,653	19,572
Australia / New Zealand
Non cash items included in segment income (loss) from operations by reportable segment
Depreciation and amortization	9,065	8,954	8,842
Stock-based compensation	3,951	(117)	1,073
Education Technology Services
Non cash items included in segment income (loss) from operations by reportable segment
Depreciation and amortization	3,468	2,526	1,589
Stock-based compensation	$ 1,940	$ 1,729	$ 1,147