Summary of Significant Accounting Policies - Additional Information (Details) $ in Thousands		12 Months Ended
	Jul. 01, 2018	Dec. 31, 2024 USD ($) item segment Agency project	Dec. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)
Summary Of Significant Accounting Policies
Investments		$ 0	$ 98,031
Other assets		$ 1,357	1,641
Number of operating segments | segment		1
Number of reporting units | segment		1
Number of university partners | item		22
Goodwill		$ 160,766	160,766
Unbilled revenue amounts		115	188
Amounts written off		0
Allowance for doubtful accounts		0
Reserve for uncertain tax positions including interest and penalties		$ 14,626	13,631
Number of stages of software development projects | project		3
Stockholders equity		$ 783,853	718,014	$ 637,619	$ 1,045,047
Income tax expense		65,081	54,690	$ 55,444
Cash in excess of FDIC insured limits		$ 323,124	$ 145,474
Revenue Benchmark | Customer Concentration Risk | Grand Canyon University
Summary Of Significant Accounting Policies
Concentration risk percentage		88.90%	87.80%
Computer Software
Summary Of Significant Accounting Policies
Estimated average useful life		3 years
Capitalized Content Development
Summary Of Significant Accounting Policies
Estimated average useful life		4 years
Other assets		$ 658	$ 746
University partner relationships
Summary Of Significant Accounting Policies
Estimated average useful life		25 years
Furniture, Fixtures and Equipment
Summary Of Significant Accounting Policies
Property and equipment, useful life		10 years
Computer Equipment
Summary Of Significant Accounting Policies
Property and equipment, useful life		4 years
Vehicles
Summary Of Significant Accounting Policies
Property and equipment, useful life		5 years
Minimum
Summary Of Significant Accounting Policies
Initial contract terms of service agreements		7 years
Number of major rating agencies reporting credit ratings | Agency		1
Minimum | Land Improvements and Buildings
Summary Of Significant Accounting Policies
Property and equipment, useful life		10 years
Maximum
Summary Of Significant Accounting Policies
Initial contract terms of service agreements		15 years
Maximum | Land Improvements and Buildings
Summary Of Significant Accounting Policies
Property and equipment, useful life		40 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%