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Stock Compensation Plans | 12 Months Ended
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Dec. 31, 2020
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract] |
Stock Compensation Plans | (15) Stock Compensation Plans Equity Incentive Plan. Lamar’s 1996 Equity Incentive Plan, as amended, (the “1996 Plan”) has reserved 17.5 million shares of common stock for issuance to directors and employees, including options granted and common stock reserved for issuance under its performance-based incentive program. Options granted under the 1996 Plan expire ten years from the grant date with vesting terms ranging from three to five years which primarily includes 1) options that vest in one-fifth increments beginning on the grant date and continuing on each of the first four anniversaries of the grant date and 2) options that cliff-vest on the fifth anniversary of the grant date. All grants are made at fair market value based on the closing price of our Class A common stock as reported on the NASDAQ Global Select Market on the date of grant. In February 2013, the 1996 Plan was amended to eliminate the provision that limited the amount of Class A common stock, including shares retained from an award, that could be withheld to satisfy tax withholding obligations to the minimum tax obligations required by law (except with respect to option awards). In accordance with ASC 718, Compensation – Stock Compensation, the Company is required to classify the awards affected by the amendment as liability-classified awards at fair value each period prior to their settlement. As of December 31, 2020 and 2019, the Company recorded a liability, in accrued expenses, of $11,589 and $23,297, respectively, related to its equity incentive awards affected by this amendment. We use a Black-Scholes-Merton option pricing model to estimate the fair value of share-based awards. The Black-Scholes-Merton option pricing model incorporates various highly subjective assumptions, including expected term and expected volatility. We have reviewed our historical pattern of option exercises and have determined that meaningful differences in option exercise activity existed among vesting schedules. Therefore, for all stock options granted after January 1, 2006, we have categorized these awards into two groups of vesting 1) 5-year cliff vest and 2) 4-year graded vest, for valuation purposes. We have determined there were no meaningful differences in employee activity under our ESPP due to the nature of the plan. We estimate the expected term of options granted using an implied life derived from the results of a hypothetical mid-point settlement scenario, which incorporates our historical exercise, expiration and post-vesting employment termination patterns, while accommodating for partial life cycle effects. We believe these estimates will approximate future behavior. We estimate the expected volatility of our Class A common stock at the grant date using a blend of 90% historical volatility of our Class A common stock and 10% implied volatility of publicly traded options with maturities greater than six months on our Class A common stock as of the option grant date. Our decision to use a blend of historical and implied volatility was based upon the volume of actively traded options on our common stock and our belief that historical volatility alone may not be completely representative of future stock price trends. Our risk-free interest rate assumption is determined using the Federal Reserve nominal rates for U.S. Treasury zero-coupon bonds with maturities similar to those of the expected term of the award being valued. We assumed an expected dividend yield of 5%. We estimate option forfeitures at the time of grant and periodically revise those estimates in subsequent periods if actual forfeitures differ from those estimates. We record stock based compensation expense only for those awards expected to vest using an estimated forfeiture rate based on our historical forfeiture data. The fair value of each option grant is estimated on the date of grant using the Black-Scholes option-pricing model with the following weighted-average assumptions used:
Grant Year |  | Dividend Yield |  |  | Expected Volatility |  |  | Risk Free Interest Rate |  |  | Expected Lives |
2020 |  | 5% |  |  | 45% |  |  | 2% |  |  |  | 6 |
2019 |  | 5% |  |  | 46% |  |  | 2% |  |  |  | 6 |
2018 |  | 5% |  |  | 46% |  |  | 2% |  |  |  | 6 |
Information regarding the 1996 Plan for the year ended December 31, 2020 is as follows:
|  | Shares |  |  | Weighted Average Exercise Price |  |  | Weighted Average Contractual Life |
Outstanding, beginning of year |  |  | 608,375 |  |  | $ | 57.97 |  |  |  |  |
Granted |  |  | 63,500 |  |  |  | 71.91 |  |  |  |  |
Exercised |  |  | (61,949 | ) |  |  | 50.66 |  |  |  |  |
Forfeited |  |  | — |  |  |  | — |  |  |  |  |
Expired |  |  | (11,000 | ) |  |  | 50.81 |  |  |  |  |
Outstanding, end of year |  |  | 598,926 |  |  |  | 60.34 |  |  |  | 5.42 |
Exercisable at end of year |  |  | 422,626 |  |  |  | 55.06 |  |  |  | 4.25 |
At December 31, 2020 there was $2,544 of unrecognized compensation cost related to stock options granted which is expected to be recognized over a weighted-average period of 1.62 years. Shares available for future stock option and restricted share grants to employees and directors under existing plans were 2,435,451 at December 31, 2020. The aggregate intrinsic value of options outstanding as of December 31, 2020 was $13,824, and the aggregate intrinsic value of options exercisable was $11,927. Total intrinsic value of options exercised was $1,644 for the year ended December 31, 2020. Stock Purchase Plan. Lamar Advertising’s 2009 Employee Stock Purchase Plan (the “2009 ESPP”), approved by our shareholders on May 28, 2009, expired by its terms on June 30, 2019. On May 30, 2019, our shareholders approved Lamar Advertising’s 2019 Employee Stock Purchase Plan (the “2019 ESPP”). The 2019 ESPP became effective upon the expiration of the 2009 ESPP. The number of shares of Class A common stock available for issuance under the 2019 ESPP was automatically increased by 86,093 shares on January 1, 2020 pursuant to the automatic increase provisions of the 2019 ESPP. The following is a summary of 2019 ESPP share activity for the year ended December 31, 2020:
|  | Shares |
Available for future purchases, January 1, 2020 |  |  | 438,434 |
Additional shares reserved under 2019 ESPP |  |  | 86,093 |
Purchases |  |  | (154,756 | )
Available for future purchases, December 31, 2020 |  |  | 369,771 |
Performance-based compensation. Unrestricted shares of our Class A common stock may be awarded to key officers and employees under our 1996 Plan based on certain Company performance measures for fiscal year 2020. The number of shares to be issued, if any, are dependent on the level of achievement of these performance measures as determined by the Company’s Compensation Committee based on our 2020 results and were issued in the first half of 2021. The shares subject to these awards generally can range from a minimum of 0% to a maximum of either 100% of the target number of shares or 150% of a target dollar amount depending on the level at which the goals are attained. Based on the Company’s performance measures achieved through December 31, 2020, the Company has accrued $10,484 as compensation expense related to these agreements.

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