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STOCK BASED AND OTHER COMPENSATION PLANS - Summary of Grants (Details) - USD ($) $ in Thousands |  |  |  | 3 Months Ended
--- | --- | --- | --- | ---
Jul. 19, 2018 | Apr. 24, 2018 | Feb. 18, 2018 | Mar. 31, 2019 | Mar. 31, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Recognized equity based compensation expense |  |  |  | $ (11,292) | $ (2,400)
Restricted Stock |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Number of restricted shares granted (in shares) |  |  |  | 1,552,114 | 25,370
Recognized equity based compensation expense |  |  |  | $ (11,292) | $ (2,400)
Stock Options |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Stock Options |  |  |  | 12,073 | 0
Class A Common Stock | Restricted Stock |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Number of restricted shares granted (in shares) | 4,720 | 3,566 | 25,370 | 1,541,683 | 25,370
Weighted Average Fair Value (in dollars) |  |  |  | $ 27,071 | $ 375
Class A Common Stock | Dividend Declared |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Number of restricted shares granted (in shares) |  |  |  | 11,113 | 0
Weighted Average Fair Value (in dollars) |  |  |  | $ 185 | $ 0

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- Definition The weighted average fair value for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan). + References No definition available. + Details
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