Revenue Recognition - Narrative (Details) $ in Millions	6 Months Ended
	Jun. 30, 2023 USD ($) course term
Graduation Fund [Line Items]
Number of free courses	1
Number of successfully completed courses	3
Consecutive terms of non attendance in which Graduation Fund credits will be lost | term	1
Expected collection period of tuition receivable	12 months
Graduation fund estimated to be redeemed | $	$ 19.4
Minimum
Graduation Fund [Line Items]
Expected collection period of tuition receivable, noncurrent	2 years
Deferred acquisition costs, amortization period	1 year
Maximum
Graduation Fund [Line Items]
Expected collection period of tuition receivable, noncurrent	4 years
Deferred acquisition costs, amortization period	2 years