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Earnings Per Share - Narrative (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Jun. 30, 2019 | Sep. 30, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Long-term equity-based compensation expense |  | $ 19,654
Restricted Stock Units |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Accelerated vesting of equity instruments (in shares) | 473,126 |
Performance Share Units |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Accelerated vesting of equity instruments (in shares) | 903,100 |
Southeastern Asset Management, Inc. |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Ownership percentage in equity method investment |  | 25.00%

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