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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% |  |  |  |

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