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The Transaction - Summary of Disposed Assets, previously Assets and Liabilities Held for Sale Transferred to GCU - Additional Information (Details) - USD ($) $ in Thousands |  | 3 Months Ended | 6 Months Ended | 12 Months Ended
--- | --- | --- | --- | ---
Jul. 01, 2018 | Jun. 30, 2019 | Mar. 31, 2019 | Dec. 31, 2018 | Sep. 30, 2018 | Jun. 30, 2018 | Mar. 31, 2018 | Dec. 31, 2018 | Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
The Transaction |  |  |  |  |  |  |  |  |  |  |
Loss on Transaction |  | $ (122) | $ 4,088 | $ 770 | $ 15,610 | $ 1,440 | $ 550 |  | $ 3,966 | $ 18,370 | $ 562
Asset impairment | $ 3,037 |  |  |  |  |  |  |  |  |  |
Grand Canyon University | Disposed of by Sale |  |  |  |  |  |  |  |  |  |  |
The Transaction |  |  |  |  |  |  |  |  |  |  |
Cash transferred at closing | $ 34,107 |  |  |  |  |  |  |  |  |  |
Loss on Transaction |  |  |  |  |  |  |  |  |  | 18,370 |
Transaction costs |  |  |  |  |  |  |  |  |  | 5,765 |
Asset impairment |  |  |  |  |  |  |  |  |  | 3,037 |
Deferred compensation expense |  |  |  |  |  |  |  |  |  | $ 9,568 |
Grand Canyon University | Disposed of by Sale | University related expenses |  |  |  |  |  |  |  |  |  |  |
The Transaction |  |  |  |  |  |  |  |  |  |  |
Share-based compensation expense related to modification and vesting of awards held by transferred employees |  |  |  |  |  |  |  | $ 7,880 |  |  |
Employer tax expense related to share-based compensation |  |  |  |  |  |  |  | 191 |  |  |
Reversals of employee related liabilities |  |  |  |  |  |  |  | $ 1,907 |  |  |

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