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STOCK-BASED COMPENSATION | 12 Months Ended
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Dec. 31, 2021
Share-based Payment Arrangement [Abstract] |
STOCK-BASED COMPENSATION | STOCK-BASED COMPENSATION Stock-based compensation expense - all related to employees and members of the Board of Directors - recognized under the authoritative guidance was as follows:
| Years Ended December 31,
Dollars in thousands | 2021 |  | 2020 |  | 2019
Cost of goods sold | 470 |  |  | 344 |  |  | 317 |
Research and development | 1,644 |  |  | 1,471 |  |  | 1,785 |
Selling, general and administrative | $ | 34,096 |  |  | $ | 17,776 |  |  | $ | 19,153 |
Total stock-based compensation expense | 36,210 |  |  | 19,591 |  |  | 21,255 |
Total estimated tax benefit related to stock-based compensation expense | 13,804 |  |  | 6,221 |  |  | 9,420 |
Net effect on net income | $ | 22,406 |  |  | $ | 13,370 |  |  | $ | 11,835 |
EMPLOYEE STOCK PURCHASE PLAN The purpose of the Employee Stock Purchase Plan (the “ESPP”) is to provide eligible employees of the Company with the opportunity to acquire shares of common stock at periodic intervals by means of accumulated payroll deductions. The ESPP is a non-compensatory plan. Under the ESPP, a total of 3.0 million shares of common stock are reserved for issuance. These shares will be made available either from the Company’s authorized but unissued shares of common stock or from shares of common stock reacquired by the Company as treasury stock. At December 31, 2021, 2.0 million shares remain available for purchase under the ESPP. During the years ended December 31, 2021, 2020 and 2019, the Company issued 16,948 shares, 18,284 shares and 12,531 shares under the ESPP for $1.1 million, $1.1 million and $0.7 million, respectively. EQUITY AWARD PLANS As of December 31, 2021, the Company had stock options, restricted stock awards, performance stock awards, contract stock awards and restricted stock unit awards outstanding under the Integra LifeSciences Holdings Corporation Fifth Amended and Restated 2003 Equity Incentive Plan (the “2003 Plan”). The 2000 and 2001 Equity Incentive Plans were terminated as of February 19, 2021, and no further awards may be issued under the plans. In May 2010 and May 2017, the stockholders of the Company approved amendments to the 2003 Plan to increase by 3.5 million and 1.7 million, respectively, the number of shares of common stock that may be issued under the 2003 Plan. The Company has reserved 4.0 million shares under each of the 2000 Plan and the 2001 Plan, and 14.7 million shares under the 2003 Plan. The Plans permit the Company to grant incentive and non-qualified stock options, stock appreciation rights, restricted stock, contract stock, performance stock, or dividend equivalent rights to designated directors, officers, employees and associates of the Company. Stock options issued under the 2003 Plan became exercisable over specified periods, generally within four years from the date of grant for officers and employees, and within one year from the date of the grant for members of the Board of Directors. The awards generally expire eight years from the grant date for employees and from six to ten years for directors and certain executive officers, except in certain instances that result in accelerated vesting due to death, disability, retirement age or change in control provisions within their grant agreements. Restricted stock issued under the 2003 Plan vests ratably over specified periods, generally three years after the date of grant. The vesting of performance stock issued under the 2003 Plan is subject to service and performance conditions. Stock Options The Company values stock option grants using the binomial distribution model. Management believes that the binomial distribution model is preferable to the Black-Scholes model because it is a more flexible model that gives consideration to the impact of non-transferability and vesting provisions in valuing employee stock options. In determining the value of stock options granted, the Company considered that it has never paid cash dividends and does not currently intend to pay cash dividends, and thus has assumed a 0% dividend yield. Expected volatilities are based on the historical volatility of the Company’s stock price. The expected life of stock options is estimated based on historical data on exercise of stock options, post-vesting forfeitures and other factors to estimate the expected term of the stock options granted. The risk-free interest rates are derived from the U.S. Treasury yield curve in effect on the date of grant for instruments with a remaining term similar to the expected life of the options. The Company accounts for forfeitures as they occur. The following weighted-average assumptions were used in the calculation of fair value:
| Years Ended December 31,
| 2021 |  | 2020 |  | 2019
Dividend yield | 0% |  | 0% |  | 0%
Expected volatility | 29% |  | 27% |  | 28%
Risk free interest rate | 1.30% |  | 0.89% |  | 2.51%
Expected life of option from grant date | 7 years |  | 7 years |  | 7 years
Weighted average grant date fair value of options granted | $22.59 |  | $13.03 |  | $18.74
The following table summarizes the Company’s stock option activity.
| Shares |  | Weighted Average Exercise Price |  | Weighted Average Contractual Term in Years |  | Aggregate Intrinsic Value
Stock Options | (In thousands) |  |  |  |  |  | (In thousands)
Outstanding at January 1, 2021 | 1,346 |  |  | $ | 39.25 |  |  | 4.41 |  | $34,560
Granted | 150 |  |  | 68.10 |  |  | — |  |  | — |
Exercised | (230) |  |  | 24.74 |  |  | — |  |  | — |
Forfeited or Expired | (41) |  |  | 51.20 |  |  | — |  |  | — |
Outstanding at December 31, 2021 | 1,225 |  |  | $ | 45.11 |  |  | 4.30 |  | $ | 26,970 |
Exercisable at December 31, 2021 | 858 |  |  | $ | 41.07 |  |  | 3.38 |  | $ | 22,242 |
The Company recognized $5.0 million, $3.2 million and $3.0 million in expense related to stock options during the years ended December 31, 2021, 2020 and 2019, respectively. The intrinsic value of options exercised for the years ended December 31, 2021, 2020 and 2019 were $11.1 million, $8.7 million and $14.6 million, respectively. Cash received from option exercises and employee stock purchase plan was $6.8 million, $5.2 million and $6.9 million, for the years ended December 31, 2021, 2020 and 2019, respectively. The realized tax benefit from options exercised w ere $2.2 mi llion, $1.7 million and $3.0 million for the years ended December 31, 2021, 2020 and 2019, respectively. As of December 31, 2021, there was approximately $2.9 million of total unrecognized compensation costs related to unvested stock options. These costs are expected to be recognized over a weighted-average period of approximately two years. Awards of Restricted Stock, Performance Stock and Contract Stock The following table summarizes the Company’s awards of restricted stock, performance stock and contract stock for the year ended December 31, 2021.
| Restricted Stock Awards |  | Performance Stock and Contract Stock Awards
| Shares |  | Weighted Average Grant Date Fair Value Per Share |  | Shares |  | Weighted Average Grant Date Fair Value Per Share
| (In thousands) |  |  |  | (In thousands) |  |
Unvested, January 1, 2021 | 472 |  |  | $ | 50.02 |  |  | 197 |  |  | 47.66 |
Granted | 242 |  |  | 68.31 |  |  | 223 |  |  | 67.91 |
Adjustments for performance achievement related to award target | — |  |  | — |  |  | 96 |  |  | 58.18 |
Cancellations | (78) |  |  | 54.94 |  |  | (152) |  |  | — |
Released | (214) |  |  | 51.63 |  |  | (20) |  |  | 67.84 |
Vested but not released | — |  |  | — |  |  | (289) |  |  | 58.06 |
Unvested, December 31, 2021 | 422 |  |  | $ | 58.78 |  |  | 55 |  |  | 70.74 |
The Company recognized $31.2 million, $16.4 million and $18.1 million in expense related to such awards during the years ended December 31, 2021, 2020 and 2019, respectively. The total fair market value of shares vested and released in 2021, 2020 and 2019 was $15.7 million, $17.3 million and $21.1 million, respectively. Vested awards include shares that have been fully earned but had not been delivered as of December 31, 2021. Performance stock awards have performance features associated with them. Performance stock, restricted stock and contract stock awards generally have requisite service periods of three years. The fair value of these awards is being expensed on a straight-line basis over the vesting period. As of December 31, 2021, there was approximately $21.1 million of total unrecognized compensation costs related to unvested restricted stock, performance stock and contract stock awards. These costs are expected to be recognized over a weighted-average period of approximately two years. As of December 31, 2021, there were approximately 0.5 million vested Restricted Units and 0.1 million vested performance share units held by various employees for which the related shares have not yet been issued. The final determination of the number of shares to be issued is made by the Company's Compensation Committee of the Board of Directors which is contingent upon achieving certain revenue and organic revenue growth performance metric. At December 31, 2021, there were approximately 3.5 million shares available for grant under the 2003 Plan. The Company capitalized into inventory, share based compensation costs of $0.5 million, $0.4 million and $0.3 million for the years ended December 31, 2021, 2020 and 2019, respectively. Such share-based compensation was recognized as cost of goods sold when related inventory was sold.

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