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Goodwill and Intangible Assets - Schedule of Goodwill (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Changes in carrying amount
Balance, beginning of period			$ 1,206,883,000	$ 1,251,888,000
Additions			0	0
Impairments	$ 0	$ 0	0	0
Currency translation adjustments			24,222,000	(10,926,000)
Balance, end of period	1,231,105,000	1,240,962,000	1,231,105,000	1,240,962,000
U.S. Higher Education
Changes in carrying amount
Balance, beginning of period			632,075,000	632,075,000
Additions			0	0
Impairments			0	0
Currency translation adjustments			0	0
Balance, end of period	632,075,000	632,075,000	632,075,000	632,075,000
Australia / New Zealand
Changes in carrying amount
Balance, beginning of period			474,808,000	519,813,000
Additions			0	0
Impairments			0	0
Currency translation adjustments			24,222,000	(10,926,000)
Balance, end of period	499,030,000	508,887,000	499,030,000	508,887,000
Education Technology Services
Changes in carrying amount
Balance, beginning of period			100,000,000	100,000,000
Additions			0	0
Impairments			0	0
Currency translation adjustments			0	0
Balance, end of period	$ 100,000,000	$ 100,000,000	$ 100,000,000	$ 100,000,000

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