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Acquisition of Torrens University and Associated Assets in Australia and New Zealand - Narrative (Details) $ in Thousands |  | 3 Months Ended | 9 Months Ended |
--- | --- | --- | --- | ---
Nov. 03, 2020 USD ($) student industryVertical | Mar. 31, 2021 USD ($) | Sep. 30, 2021 USD ($) | Dec. 31, 2020 USD ($)
Business Acquisition [Line Items] |  |  |  |
Goodwill |  |  | $ 1,280,221 | $ 1,318,526
Measurement period adjustment, goodwill |  |  | 262 |
Torrens University and Related Assets in Australia and New Zealand (ANZ) |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Number of students | student | 19,000 |  |  |
Number of industries | industryVertical | 5 |  |  |
Purchase price paid in cash at closing | $ 658,400 |  |  |
Value of business acquisition agreement | 642,700 |  |  |
Purchase price adjustment | 15,700 |  |  |
Net cash increase at closing | 11,000 |  |  |
Working capital increase at closing | 4,700 |  |  |
Goodwill | $ 546,315 |  |  |
Acquisition related costs |  |  | $ 8,100 |
Measurement period adjustment, property and equipment |  | $ 300 |  |
Measurement period adjustment, goodwill |  | $ 300 |  |

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