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Notes Payable and Other Noncurrent Liabilities (Details) - USD ($) $ in Thousands |  |  | 1 Months Ended | 3 Months Ended | 12 Months Ended
--- | --- | --- | --- | --- | ---
Oct. 31, 2019 | Jan. 22, 2019 | Oct. 31, 2021 | Mar. 31, 2019 | Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Notes Payable and Other Noncurrent Liabilities |  |  |  |  |  |  |
Repayments of term loan |  | $ 59,850 |  |  |  |  |
Cash collateral released on repayment of debt |  | 61,667 |  |  |  |  |
Repayment by GCU |  |  | $ 500,000 |  | $ 1,159,912 | $ 75,000 | $ 100,000
Credit facility |  |  |  |  |  |  |
Notes Payable and Other Noncurrent Liabilities |  |  |  |  |  |  |
Amount of credit facilities |  | $ 325,000 |  |  |  |  |
Term of credit facility |  | 5 years |  |  |  |  |
Loan modification costs expensed |  |  | $ 1,028 | $ 150 |  |  |
Term loan facility |  |  |  |  |  |  |
Notes Payable and Other Noncurrent Liabilities |  |  |  |  |  |  |
Amount of credit facilities |  | $ 243,750 |  |  |  |  |
Loan modification costs |  | 1,639 |  |  |  |  |
Revolving Line of Credit |  |  |  |  |  |  |
Notes Payable and Other Noncurrent Liabilities |  |  |  |  |  |  |
Amount of credit facilities |  | 81,250 |  |  |  |  |
Loan modification costs |  | 596 |  |  |  |  |
Revolving Line of Credit | Orbis Education |  |  |  |  |  |  |
Notes Payable and Other Noncurrent Liabilities |  |  |  |  |  |  |
Acquisition consideration funded by credit agreement |  | $ 6,250 |  |  |  |  |
Amendment - October 31, 2019 | Term loan facility |  |  |  |  |  |  |
Notes Payable and Other Noncurrent Liabilities |  |  |  |  |  |  |
Amount of credit facilities | $ 150,625 |  |  |  |  |  |
Increase (decrease) in facility | (68,750) |  |  |  |  |  |
Amendment - October 31, 2019 | Revolving Line of Credit |  |  |  |  |  |  |
Notes Payable and Other Noncurrent Liabilities |  |  |  |  |  |  |
Amount of credit facilities | 150,000 |  |  |  |  |  |
Increase (decrease) in facility | $ 68,750 |  |  |  |  |  |

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