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STOCK-BASED COMPENSATION | 12 Months Ended
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Dec. 31, 2020
Share-based Payment Arrangement, Noncash Expense [Abstract] |
STOCK-BASED COMPENSATION | STOCK-BASED COMPENSATION On May 18, 2017, the shareholders of the Company approved the 2017 Omnibus Incentive Plan (the “2017 Incentive Plan”) which authorizes 3,150,000 shares for issuance under the plan. Awards granted under the 2017 Incentive Plan may be in the form of stock options, stock appreciation rights, restricted stock, restricted stock units, other share-based awards, and cash awards to directors, officers, and other eligible employees of the Company. The Company recognizes all share-based awards to eligible employees based upon their fair value. The Company’s policy is to recognize expense for awards that have service conditions only subject to graded vesting using the straight-line attribution method. Total stock-based compensation expense was $4.5 million, $9.0 million, and $10.2 million in the years ended December 31, 2020, 2019 and 2018, respectively, and is included in Cost of sales, General and administrative expenses, and Selling expenses within the Consolidated Statements of Operations. The amount of compensation costs related to nonvested stock options and restricted stock not yet recognized was approximately $10.9 million at December 31, 2020, for which the weighted average remaining life was 1.8 years. Restricted Stock Restricted stock awards vest over a period of one to three years and may be based on the achievement of specific financial performance metrics and market conditions. Awards based strictly on time-based vesting and those awards with performance metrics are valued at the market price on the date of grant. The fair values of the awards that contain market conditions are estimated using a Monte Carlo simulation approach in a risk-neutral framework to model future stock price movements based upon historical volatility, risk-free rates of return, and correlation matrix. Restricted stock awards are generally forfeitable in the event of terminated employment prior to vesting. A summary of all restricted stock activity during 2020 is as follows:
| Number of Shares |  | Weighted Average Grant Date Fair Value
Restricted Stock Outstanding at December 31, 2019 | 1,691,699 |  |  | $ | 20.24 |
Granted | 1,010,802 |  |  | 12.43 |
Vested | (314,048) |  |  | 19.60 |
Forfeited | (556,074) |  |  | 20.56 |
Restricted Stock Outstanding at December 31, 2020 | 1,832,379 |  |  | $ | 16.06 |
During 2020, 2019, and 2018, the Company granted 1,010,802, 853,994 and 593,705 shares of restricted stock, respectively, with aggregate fair values on the date of grant of $12.6 million, $13.0 million, and $14.6 million, respectively. The total fair value of restricted stock that vested during 2020, 2019, and 2018 was $3.7 million, $7.4 million and $15.0 million, respectively. Stock Options Stock options are awarded with an exercise price equal to the market price of the underlying stock on the date of grant, become fully exercisable three years after the date of grant and expire ten years after the date of grant. No stock options have been granted by the Company since February 2015. A summary of all stock option activity during 2020 is as follows:
| Number of Options |  | Weighted Average Exercise Price |  | Weighted Average Remaining Contractual Life |  | Aggregate Intrinsic Value ($ in millions)
Options Outstanding at December 31, 2019 | 531,942 |  |  | $ | 11.54 |  |  | 3.1 |  | $ | 1.7 |
Exercised | (113,312) |  |  | $ | 11.24 |  |  |  |  | $ | 0.5 |
Forfeited | — |  |  | $ | — |  |  |  |  |
Expired | (4,550) |  |  | $ | 13.74 |  |  |  |  |
Options Outstanding at December 31, 2020 | 414,080 |  |  | $ | 11.60 |  |  | 2.2 |  | $ | 2.3 |
Options Exercisable at December 31, 2020 | 368,333 |  |  | $ | 11.67 |  |  | 2.3 |  | $ | 2.0 |
The total intrinsic value of stock options exercised during 2020, 2019, and 2018 was $0.5 million, $0.5 million, and $1.5 million, respectively.

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- Definition The entire disclosure for share-based payment arrangement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -URI http://asc.fasb.org/topic&trid=2228938 + Details
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