Summary of Significant Accounting Policies - Additional Information (Details) $ in Thousands		3 Months Ended		9 Months Ended
	Jul. 01, 2018	Sep. 30, 2024 USD ($) item	Sep. 30, 2023 USD ($)	Sep. 30, 2024 USD ($) segment item	Sep. 30, 2023 USD ($)	Jun. 30, 2024 USD ($)	Mar. 31, 2024 USD ($)	Dec. 31, 2023 USD ($)	Jun. 30, 2023 USD ($)	Mar. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)
Summary Of Significant Accounting Policies
Investments		$ 0		$ 0				$ 98,031
Other assets		$ 1,636		$ 1,636				1,641
Number of operating segments | segment				1
Number of reporting units | segment				1
Number of university partners | item		22		22
Goodwill		$ 160,766		$ 160,766				160,766
Unbilled revenue		8,351		8,351				188
Amounts written off				0
Allowance for doubtful accounts		0		0
Stockholders equity		764,137	$ 650,530	764,137	$ 650,530	$ 759,195	$ 759,447	718,014	$ 645,425	$ 659,250	$ 637,619
Income tax expense		10,862	$ 8,537	43,008	$ 34,636
Cash in excess of FDIC insured limits		$ 262,584		$ 262,584				145,474
Revenue Benchmark | Customer Concentration Risk | Grand Canyon University
Summary Of Significant Accounting Policies
Concentration risk percentage				88.30%	87.00%
Computer Software
Summary Of Significant Accounting Policies
Estimated average useful life		3 years		3 years
Capitalized Content Development
Summary Of Significant Accounting Policies
Estimated average useful life		4 years		4 years
Other assets		$ 676		$ 676				$ 746
University partner relationships
Summary Of Significant Accounting Policies
Estimated average useful life		25 years		25 years
Minimum
Summary Of Significant Accounting Policies
Initial contract terms of service agreements				7 years
Maximum
Summary Of Significant Accounting Policies
Initial contract terms of service agreements				15 years
Master Services Agreement | Grand Canyon University
Summary Of Significant Accounting Policies
Percentage of tuition and fee revenue used for closing of purchase agreement	60.00%