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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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Restructuring Charges - Schedule of Adjustments to the Accrued Restructuring Liability (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Restructuring Reserve [Roll Forward]
Beginning Balance			$ 14,506
Additional Costs			12,937
Cash Payments			(20,517)
Ending Balance	$ 6,926		6,926
Degree Program Segment
Restructuring Reserve [Roll Forward]
Total restructuring charges	7,689	$ 2,919	11,247	$ 7,026
Alternative Credential Segment
Restructuring Reserve [Roll Forward]
Total restructuring charges	717	703	1,886	1,471
Other severance and severance-related costs
Restructuring Reserve [Roll Forward]
Beginning Balance			243
Additional Costs			0
Cash Payments			(243)
Ending Balance	0		0
Leadership and organizational structure changes \| Degree Program Segment
Restructuring Reserve [Roll Forward]
Total restructuring charges	5,349	0	6,489	0
Leadership and organizational structure changes \| Alternative Credential Segment
Restructuring Reserve [Roll Forward]
Total restructuring charges	0	0	308	0
Leadership and organizational structure changes \| Leadership and organizational structure changes
Restructuring Reserve [Roll Forward]
Beginning Balance			9,779
Additional Costs			5,025
Cash Payments			(8,907)
Ending Balance	5,897		5,897
Leadership and organizational structure changes \| Severance and severance-related costs \| Degree Program Segment
Restructuring Reserve [Roll Forward]
Total restructuring charges	3,951	0	5,091	0
Leadership and organizational structure changes \| Severance and severance-related costs \| Alternative Credential Segment
Restructuring Reserve [Roll Forward]
Total restructuring charges	0	0	308	0
Leadership and organizational structure changes \| Lease and lease-related charges \| Degree Program Segment
Restructuring Reserve [Roll Forward]
Total restructuring charges	1,398	0	1,398	0
Leadership and organizational structure changes \| Lease and lease-related charges \| Alternative Credential Segment
Restructuring Reserve [Roll Forward]
Total restructuring charges	0	0	0	0
2022 Strategic Realignment Plan \| Degree Program Segment
Restructuring Reserve [Roll Forward]
Total restructuring charges	1,956	2,546	3,967	6,273
2022 Strategic Realignment Plan \| Alternative Credential Segment
Restructuring Reserve [Roll Forward]
Total restructuring charges	717	682	1,578	1,441
2022 Strategic Realignment Plan \| Severance and severance-related costs
Restructuring Reserve [Roll Forward]
Beginning Balance			4,093
Additional Costs			107
Cash Payments			(3,595)
Ending Balance	605		605
2022 Strategic Realignment Plan \| Severance and severance-related costs \| Degree Program Segment
Restructuring Reserve [Roll Forward]
Total restructuring charges	0	0	0	1,231
2022 Strategic Realignment Plan \| Severance and severance-related costs \| Alternative Credential Segment
Restructuring Reserve [Roll Forward]
Total restructuring charges	0	0	0	0
2022 Strategic Realignment Plan \| Professional and other fees relating to restructuring activities
Restructuring Reserve [Roll Forward]
Beginning Balance			363
Additional Costs			191
Cash Payments			(558)
2022 Strategic Realignment Plan \| Professional and other fees relating to restructuring activities \| Degree Program Segment
Restructuring Reserve [Roll Forward]
Total restructuring charges	0	404	0	744
2022 Strategic Realignment Plan \| Professional and other fees relating to restructuring activities \| Alternative Credential Segment
Restructuring Reserve [Roll Forward]
Total restructuring charges	0	0	119	0
2022 Strategic Realignment Plan \| Professional and other fees relating to restructuring activities
Restructuring Reserve [Roll Forward]
Ending Balance	(4)		(4)
2022 Strategic Realignment Plan \| Lease and lease-related charges
Restructuring Reserve [Roll Forward]
Beginning Balance			28
Additional Costs			7,614
Cash Payments			(7,214)
Ending Balance	428		428
2022 Strategic Realignment Plan \| Lease and lease-related charges \| Degree Program Segment
Restructuring Reserve [Roll Forward]
Total restructuring charges	1,956	2,129	3,967	4,272
2022 Strategic Realignment Plan \| Lease and lease-related charges \| Alternative Credential Segment
Restructuring Reserve [Roll Forward]
Total restructuring charges	$ 717	$ 682	$ 1,459	$ 1,441