Segment and Geographic Information - Total Assets by Segment (Details) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Segment Reporting Information [Line Items]
Total assets	$ 2,033,234	$ 2,109,006
Degree Program Segment deferred revenue
Segment Reporting Information [Line Items]
Total assets	525,076	546,572
Alternative Credential Segment accounts receivable
Segment Reporting Information [Line Items]
Total assets	$ 1,508,158	$ 1,562,434