Business Combinations - Valuation Methodology (Details) - USD ($) $ in Thousands		12 Months Ended
	Nov. 03, 2020	Dec. 31, 2021
Business Acquisition [Line Items]
Weighted average useful life		3 years
Torrens University and Related Assets in Australia and New Zealand (ANZ)
Business Acquisition [Line Items]
Property and equipment, net	$ 41,508
Torrens University and Related Assets in Australia and New Zealand (ANZ) | Student relationships
Business Acquisition [Line Items]
Weighted average useful life	3 years
Torrens University and Related Assets in Australia and New Zealand (ANZ) | Relief from royalty approach | Course Content
Business Acquisition [Line Items]
Property and equipment, net	$ 10,000
Torrens University and Related Assets in Australia and New Zealand (ANZ) | Relief from royalty approach | Measurement Input, Long-term Revenue Growth Rate | Course Content | Minimum
Business Acquisition [Line Items]
Property, plant and equipment, measurement input	5.60%
Torrens University and Related Assets in Australia and New Zealand (ANZ) | Relief from royalty approach | Measurement Input, Long-term Revenue Growth Rate | Course Content | Maximum
Business Acquisition [Line Items]
Property, plant and equipment, measurement input	6.20%
Torrens University and Related Assets in Australia and New Zealand (ANZ) | Relief from royalty approach | Measurement Input, Long-term Revenue Growth Rate | Trade names | Minimum
Business Acquisition [Line Items]
Indefinite-lived intangible asset, measurement input	2.50%
Torrens University and Related Assets in Australia and New Zealand (ANZ) | Relief from royalty approach | Measurement Input, Long-term Revenue Growth Rate | Trade names | Maximum
Business Acquisition [Line Items]
Indefinite-lived intangible asset, measurement input	6.30%
Torrens University and Related Assets in Australia and New Zealand (ANZ) | Relief from royalty approach | Measurement Input, Royalty Rate | Course Content
Business Acquisition [Line Items]
Property, plant and equipment, measurement input	3.00%
Torrens University and Related Assets in Australia and New Zealand (ANZ) | Relief from royalty approach | Measurement Input, Royalty Rate | Trade names
Business Acquisition [Line Items]
Indefinite-lived intangible asset, measurement input	2.50%
Torrens University and Related Assets in Australia and New Zealand (ANZ) | Relief from royalty approach | Measurement Input, Discount Rate | Course Content
Business Acquisition [Line Items]
Property, plant and equipment, measurement input	11.00%
Torrens University and Related Assets in Australia and New Zealand (ANZ) | Relief from royalty approach | Measurement Input, Discount Rate | Trade names
Business Acquisition [Line Items]
Indefinite-lived intangible asset, measurement input	11.00%
Torrens University and Related Assets in Australia and New Zealand (ANZ) | Relief from royalty approach | Student relationships | Course Content
Business Acquisition [Line Items]
Weighted average useful life	3 years
Torrens University and Related Assets in Australia and New Zealand (ANZ) | Valuation Technique, Excess Earnings Method | Student relationships | Measurement Input, Discount Rate
Business Acquisition [Line Items]
Finite-lived intangible asset, measurement input	11.00%
Torrens University and Related Assets in Australia and New Zealand (ANZ) | Valuation Technique, Excess Earnings Method | Student relationships | Measurement Input, Annual Attrition Rate
Business Acquisition [Line Items]
Finite-lived intangible asset, measurement input	60.00%
Torrens University and Related Assets in Australia and New Zealand (ANZ) | Cost approach
Business Acquisition [Line Items]
Contract liabilities fair value, percentage of carrying value	70.00%