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Business Combinations - Valuation Methodology (Details) - USD ($) $ in Thousands |  |  | 12 Months Ended
--- | --- | --- | ---
Nov. 03, 2020 | Aug. 01, 2018 | Dec. 31, 2020
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 | $ 41,770 |  |
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) | Cost approach |  |  |
Business Acquisition [Line Items] |  |  |
Contract Liabilities Fair Value, Percentage of Carrying Value | 70.00% |  |
Capella Merger |  |  |
Business Acquisition [Line Items] |  |  |
Property and equipment, net |  | $ 53,182 |
Capella Merger | Relief from royalty approach | Course Content |  |  |
Business Acquisition [Line Items] |  |  |
Property and equipment, net |  | $ 14,000 |
Capella Merger | Relief from royalty approach | Measurement Input, Long-term Revenue Growth Rate | Course Content |  |  |
Business Acquisition [Line Items] |  |  |
Property, Plant and Equipment, Measurement Input |  | 2.50% |
Capella Merger | Relief from royalty approach | Measurement Input, Long-term Revenue Growth Rate | Trade names |  |  |
Business Acquisition [Line Items] |  |  |
Indefinite-Lived Intangible Asset, Measurement Input |  | 2.50% |
Capella Merger | Relief from royalty approach | Measurement Input, Royalty Rate | Course Content |  |  |
Business Acquisition [Line Items] |  |  |
Property, Plant and Equipment, Measurement Input |  | 3.00% |
Capella Merger | Relief from royalty approach | Measurement Input, Royalty Rate | Trade names |  |  |
Business Acquisition [Line Items] |  |  |
Indefinite-Lived Intangible Asset, Measurement Input |  | 5.00% |
Capella Merger | Relief from royalty approach | Measurement Input, Discount Rate | Course Content |  |  |
Business Acquisition [Line Items] |  |  |
Property, Plant and Equipment, Measurement Input |  | 10.00% |
Capella Merger | Relief from royalty approach | Measurement Input, Discount Rate | Trade names |  |  |
Business Acquisition [Line Items] |  |  |
Indefinite-Lived Intangible Asset, Measurement Input |  | 13.00% |
Capella Merger | Cost approach |  |  |
Business Acquisition [Line Items] |  |  |
Contract Liabilities Fair Value, Percentage of Carrying Value |  | 58.00% |
Capella Merger | Cost approach | Course Content |  |  |
Business Acquisition [Line Items] |  |  |
Property and equipment, net |  | $ 5,000 |
Student relationships | Torrens University and Related Assets in Australia and New Zealand (ANZ) |  |  |
Business Acquisition [Line Items] |  |  |
Weighted average useful life | 3 years |  |
Student relationships | Torrens University and Related Assets in Australia and New Zealand (ANZ) | Relief from royalty approach | Course Content |  |  |
Business Acquisition [Line Items] |  |  |
Weighted average useful life | 3 years |  |
Student relationships | Torrens University and Related Assets in Australia and New Zealand (ANZ) | Valuation Technique, Excess Earnings Method | Measurement Input, Discount Rate |  |  |
Business Acquisition [Line Items] |  |  |
Finite-Lived Intangible Asset, Measurement Input | 11.00% |  |
Student relationships | Torrens University and Related Assets in Australia and New Zealand (ANZ) | Valuation Technique, Excess Earnings Method | Measurement Input, Annual Attrition Rate |  |  |
Business Acquisition [Line Items] |  |  |
Finite-Lived Intangible Asset, Measurement Input | 60.00% |  |
Student relationships | Capella Merger |  |  |
Business Acquisition [Line Items] |  |  |
Weighted average useful life |  | 3 years |
Student relationships | Capella Merger | Course Content |  |  |
Business Acquisition [Line Items] |  |  |
Weighted average useful life |  | 3 years |
Student relationships | Capella Merger | Valuation Technique, Excess Earnings Method | Measurement Input, Discount Rate |  |  |
Business Acquisition [Line Items] |  |  |
Finite-Lived Intangible Asset, Measurement Input |  | 10.00% |
Student relationships | Capella Merger | Valuation Technique, Excess Earnings Method | Measurement Input, Annual Attrition Rate |  |  |
Business Acquisition [Line Items] |  |  |
Finite-Lived Intangible Asset, Measurement Input |  | 45.00% |

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