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Share-based Compensation and Equity - Stock Option Grant (Details) - USD ($) $ / shares in Units, $ in Thousands |  | 3 Months Ended | 6 Months Ended | 12 Months Ended
--- | --- | --- | --- | ---
Jan. 31, 2017 | Jun. 30, 2017 | Mar. 31, 2017 | Dec. 31, 2017 | Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Options granted in the period (in shares) |  |  |  |  | 698,000 | 717,000 | 4,283,000
Exercise price of stock options granted in the period (in dollars per share) |  |  |  |  | $ 14.99 | $ 14.27 | $ 19.01
Stock compensation expense |  |  |  |  | $ 12,994 | $ 10,791 | $ 64,788
Stock options, net of estimated forfeitures |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Stock compensation expense |  |  |  | $ 15,000 |  |  |
Stock options, net of estimated forfeitures | Class B Common Stock |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Stock compensation expense |  | $ 5,100 |  |  |  |  |
Chief Executive Officer | Executive Profits Interests | Class B Common Stock |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Options granted in the period (in shares) | 2,773,000 |  |  |  |  |  |
Chief Executive Officer | Executive Profits Interests | Class B Common Stock | Tranche One |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Exercise price of stock options granted in the period (in dollars per share) | $ 17.00 |  |  |  |  |  |
Percent of options subject to exercise price range | 50.00% |  |  |  |  |  |
Chief Executive Officer | Executive Profits Interests | Class B Common Stock | Tranche Two |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Exercise price of stock options granted in the period (in dollars per share) | $ 21.32 |  |  |  |  |  |
Percent of options subject to exercise price range | 50.00% |  |  |  |  |  |
Chief Executive Officer | Executive Profits Interests | Stock options, net of estimated forfeitures | Class B Common Stock |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Stock compensation expense |  |  | $ 14,600 |  |  |  |

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