Segment Reporting - Financial Information by Reportable Segment (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Revenues
Revenues	$ 263,123	$ 270,078	$ 795,542	$ 859,587
Income (loss) from operations
Income (loss) from operations	7,807	7,348	43,113	46,048
Amortization of intangible assets	(3,522)	(8,932)	(10,954)	(47,731)
Merger and integration costs	(269)	(1,111)	(933)	(4,060)
Restructuring costs	(610)	(3,322)	(6,129)	(26,400)
U.S. Higher Education
Revenues
Revenues	185,499	191,893	571,291	630,647
Income (loss) from operations
Income (loss) from operations	(1,948)	5,168	25,386	84,981
Australia / New Zealand
Revenues
Revenues	61,177	65,224	177,232	190,549
Income (loss) from operations
Income (loss) from operations	8,934	10,364	20,506	23,016
Education Technology Services
Revenues
Revenues	16,447	12,961	47,019	38,391
Income (loss) from operations
Income (loss) from operations	$ 5,222	$ 5,181	$ 15,237	$ 16,242