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STOCK-BASED COMPENSATION (Tables) | 12 Months Ended
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Dec. 31, 2024
Share-Based Payment Arrangement [Abstract] |
Summary of restricted stock activity | The following table summarizes RSA and RSU activity during the years ended December 31, 2024, 2023, and 2022:
| Number of shares |  | Weighted average grant date fair value
Nonvested stock at January 1, 2022 | 443,319 |  |  | $ | 99.22
Granted | 369,037 |  |  | 119.97
Vested | (201,457) |  |  | 99.87
Forfeited | (54,837) |  |  | 106.07
Nonvested stock at December 31, 2022 | 556,062 |  |  | $ | 112.07
Granted | 401,685 |  |  | 132.58
Vested | (237,315) |  |  | 108.25
Forfeited | (82,251) |  |  | 121.02
Nonvested stock at December 31, 2023 | 638,181 |  |  | $ | 125.25
Granted | 226,061 |  |  | 183.27
Vested | (298,023) |  |  | 117.28
Forfeited | (43,484) |  |  | 145.53
Nonvested stock at December 31, 2024 | 522,735 |  |  | $ | 153.20
Summary of performance-based restricted stock units activity | The following table summarizes restricted stock units contingent upon achievement of performance conditions, also known as PSUs, activity during the years ended December 31, 2024, 2023, and 2022:
| Number of Shares |  | Weighted average grant date fair value
Nonvested stock at January 1, 2022 | 152,410 |  |  | $ | 108.41 |
Granted | 64,668 |  |  | 141.41 |
Vested | (16,834) |  |  | 96.00 |
Forfeited | (33,542) |  |  | 95.40 |
Nonvested stock at December 31, 2022 | 166,702 |  |  | $ | 125.08 |
Granted | 87,146 |  |  | 144.35 |
Vested | (55,399) |  |  | 130.05 |
Forfeited | (63,965) |  |  | 141.49 |
Nonvested stock at December 31, 2023 | 134,484 |  |  | $ | 127.72 |
Granted | 86,996 |  |  | 145.21 |
Vested | (110,376) |  |  | 100.50 |
Forfeited | — |  |  | — |
Nonvested stock at December 31, 2024 | 111,104 |  |  | $ | 168.45 |
Summary of stock option/warrant activity | The following table summarizes the option activity during the years ended December 31, 2024 and 2023 (in millions, except number of shares and contractual term):
| Number of shares |  | Weighted average exercise price |  | Aggregate intrinsic value |  | Weighted average remaining contractual term
Outstanding at January 1, 2023 | 185 |  |  | $ | 0.3 |  | $ | — |  | 6 years
Granted | — |  |  | — |  | — |  | —
Vested | — |  |  | — |  | — |  | —
Outstanding at December 31, 2023 | 185 |  |  | $ | 0.3 |  | $ | — |  | 5 years
Granted | — |  |  | — |  | — |  | —
Vested | — |  |  | — |  | — |  | —
Forfeited | (185) |  |  | $ | 0.3 |  | $ | — |  | —
Outstanding at December 31, 2024 | — |  |  | $ | — |  | $ | — |  | —
The following table summarizes the Warrant Unit activity during the years ended December 31, 2024 and 2023 (in millions, except number of shares):
| Number of shares |  | Weighted average exercise price
Outstanding at January 1, 2023 | 80 |  | $ | 0.2
Granted | — |  | —
Vested, but not exercised | (40) |  |  | 0.2
Outstanding and exercisable at December 31, 2023 | 40 |  | 0.2
Outstanding at December 31, 2023 | 80 |  | $ | 0.2
Granted | — |  | —
Vested, but not exercised | — |  | —
Forfeited | (80) |  |  | 0.2
Outstanding and exercisable at December 31, 2024 | — |  | —
Outstanding at December 31, 2024 | — |  | $ | —

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