Goodwill and Intangible Assets - Schedule of Goodwill (Details) - USD ($)	3 Months Ended
Mar. 31, 2023	Mar. 31, 2022
Changes in carrying amount
Balance, beginning of period	$ 1,251,277,000
Additions	0
Impairments	0	$ 0
Currency translation adjustments	(7,947,000)
Adjustments to prior acquisitions	0
Balance, end of period	1,243,330,000
U.S. Higher Education
Changes in carrying amount
Balance, beginning of period	632,075,000
Additions	0
Impairments	0
Currency translation adjustments	0
Adjustments to prior acquisitions	0
Balance, end of period	632,075,000
Australia / New Zealand
Changes in carrying amount
Balance, beginning of period	519,202,000
Additions	0
Impairments	0
Currency translation adjustments	(7,947,000)
Adjustments to prior acquisitions	0
Balance, end of period	511,255,000
Education Technology Services
Changes in carrying amount
Balance, beginning of period	100,000,000
Additions	0
Impairments	0
Currency translation adjustments	0
Adjustments to prior acquisitions	0
Balance, end of period	$ 100,000,000

Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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