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STOCK-BASED COMPENSATION - Summary of Restricted Stock Activity (Details) - $ / shares | 12 Months Ended
--- | ---
Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Number of Shares |  |  |
Balance beginning of period (in shares) | 414,080 |  |
Vested (in shares) | (200,782) |  |
Forfeited (in shares) | 0 |  |
Balance end of period (in shares) | 199,711 | 414,080 |
Weighted Average Grant Date Fair Value |  |  |
Balance beginning of period (in usd per share) | $ 11.60 |  |
Vested (in usd per share) | 11.09 |  |
Forfeited (in usd per share) | 0 |  |
Balance end of period (in usd per share) | $ 12.20 | $ 11.60 |
Restricted Stock |  |  |
Number of Shares |  |  |
Balance beginning of period (in shares) | 1,832,379 |  |
Granted (in shares) | 582,081 | 1,010,802 | 853,994
Vested (in shares) | (296,946) |  |
Forfeited (in shares) | (336,438) |  |
Balance end of period (in shares) | 1,781,076 | 1,832,379 |
Weighted Average Grant Date Fair Value |  |  |
Balance beginning of period (in usd per share) | $ 16.06 |  |
Granted (in usd per share) | 17.45 |  |
Vested (in usd per share) | 18.01 |  |
Forfeited (in usd per share) | 22.18 |  |
Balance end of period (in usd per share) | $ 15.03 | $ 16.06 |

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