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SHARE-BASED COMPENSATION - Stock Option Activity (Details) - USD ($) | 3 Months Ended |
--- | --- | ---
Mar. 31, 2022 | Mar. 31, 2021 | Dec. 31, 2021
Weighted Average Exercise Price Per Share |  |  |
Share based compensation expense | $ 40,532,000 | $ 28,281,000 |
Share based compensation - Unrecognized deferred compensation cost | 265,570,000 |  |
Grant date fair value of award units | $ 29,000,000 |  |
2017 LTIP |  |  |
Weighted Average Exercise Price Per Share |  |  |
Beginning balance (in dollars per share) | $ 22.51 |  |
Granted (in dollars per share) | 14.01 |  |
Forfeited (in dollars per share) | 22.63 |  |
Ending balance (in dollars per share) | 22.30 |  |
Options exercisable (in dollars per share) | $ 24.23 |  |
Options outstanding, Weighted Average Remaining Contractual Term (in years) | 7 years 11 months 15 days | 8 years 3 months 14 days |
Options exercisable, Weighted Average Remaining Contractual Term (in years) | 6 years 4 months 9 days |  |
Options outstanding, Aggregate Intrinsic Value | $ 276,000 |  | $ 6,801,000
Options exercisable, Aggregate Intrinsic Value | $ 0 |  |
2017 LTIP | Share-based Payment Arrangement, Option [Member] |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward] |  |  |
Beginning balance (in shares) | 50,998,816 |  |
Forfeited (in shares) | (927,472) |  |
Ending balance (in shares) | 51,355,977 |  |
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Granted | 1,284,633 |  |
Options exercisable (in shares) | 19,713,832 |  |
Weighted Average Exercise Price Per Share |  |  |
Share based compensation expense | $ 22,497,000 | $ 24,223,000 |
Share based compensation - Unrecognized deferred compensation cost | $ 130,916,000 |  |
Expected time (in years) unrecogized compensation costs relating to share based awards will be recognized | 2 years 6 months 7 days |  |
Contingent shares subject to shareholder approval | 13,147,405 |  |
2017 LTIP | Performance Shares |  |  |
Weighted Average Exercise Price Per Share |  |  |
Share based compensation expense | $ 2,026,000 | 2,982,000 |
Share based compensation - Unrecognized deferred compensation cost | 40,931,000 |  |
2019 LTIP | Restricted Stock |  |  |
Weighted Average Exercise Price Per Share |  |  |
Share based compensation expense | 16,009,000 | $ 317,000 |
Share based compensation - Unrecognized deferred compensation cost | $ 93,723,000 |  |
2021 Lightpath Incentive Plan | Class A-1 management incentive units |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward] |  |  |
Granted (in shares) | 433,225 |  |
2021 Lightpath Incentive Plan | Class A-2 management incentive units |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward] |  |  |
Granted (in shares) | 231,928 |  |

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