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Assets Held for Sale - University of St. Augustine for Health Sciences, LLC (St. Augustine) (Details) - Disposal Group, Held-for-sale, Not Discontinued Operations $ in Thousands | 6 Months Ended | 12 Months Ended |
--- | --- | --- | ---
Jun. 30, 2018 USD ($) student | Jun. 30, 2017 USD ($) | Dec. 31, 2017 USD ($) | Apr. 24, 2018 USD ($)
Business Acquisition [Line Items] |  |  |  |
Revenues | $ 120,176 | $ 106,903 |  |
St. Augustine |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Consideration received from dispositions |  |  |  | $ 400,000
Revenues |  |  | $ 89,600 |
Operating loss |  |  | 30,500 |
Depreciation |  |  | $ 4,100 |
Number of students within the institution (student) | student | 3,500 |  |  |

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