INCENTIVE AWARD PLAN

As of March 31, 2021, there were 5,121,800 shares available for grant as equity awards under the 2017 Incentive Award Plan. In the first quarter of 2021, the Company granted restricted stock with time-based vesting as well as performance-based awards. The performance-based awards include a market condition tied to the Company’s total shareholder return in relation to its peer companies as well as a financial performance condition tied to annual EPS growth. The vesting and ultimate payout of performance awards is determined at the end of the three-year performance period and can vary from zero to 200% based on actual results.

The Company issued the following stock-based instruments:

A summary of the status and changes of the Company’s unvested shares is presented below:

The Company determines the fair value of restricted stock awards and any performance-related components based on the closing market price of the Company’s common stock on the date of grant. For share-based awards that have a performance-based vesting requirement, the Company evaluates the probability of achieving the performance criteria throughout the performance period and will adjust stock compensation expense up or down based on its estimated probable outcome. Certain performance-based awards contain market condition components which are valued on the date of grant using a Monte Carlo simulation model.

For the three months ended March 31, 2021 and 2020, the Company recognized $12.0 million and $12.4 million of compensation expense for grants under the 2017 Incentive Award Plan. As of March 31, 2021, the balance of unamortized stock compensation was $92.9 million which is expected to be recognized over a weighted-average period of 2.06 years.