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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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