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Share-Based Compensation | 9 Months Ended
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Sep. 30, 2021
Share-based Payment Arrangement [Abstract] |
Share-Based Compensation | Share-Based Compensation As of September 30, 2021, there were 1,036,709 shares of common stock available for grant under the Tutor Perini Corporation Omnibus Incentive Plan. During the nine months ended September 30, 2021 and 2020, the Company granted the following share-based instruments: (1) restricted stock units totaling 555,986 and 75,000 with weighted-average fair values per share of $16.52 and $13.93, respectively; and (2) stock options totaling 100,000 and 75,000 with weighted-average fair values per share of $15.21 and $3.94, respectively, and weighted-average per share exercise prices of $19.24 and $25.70, respectively; and (3) unrestricted stock units totaling 96,668 and 194,177 with weighted-average fair values per share of $15.62 and $8.60, respectively. The Company also granted 275,986 cash-settled performance stock units (“CPSUs”) with a weighted-average grant date fair value per share of $20.21 during the nine months ended September 30, 2021. CPSUs vest upon satisfaction of market or performance conditions and are settled in cash based on the value of the Company’s common stock on the vesting date. CPSUs are classified as liability awards and are remeasured at fair value at the end of each reporting period with the change in fair value recognized in earnings. Since no shares are issued, these awards do not dilute equity. The fair value of restricted stock units and unrestricted stock is based on the closing price of the Company’s common stock on the New York Stock Exchange on the date of the grant and the fair value of stock options is based on the Black-Scholes model. The fair value of stock options granted during the first nine months of 2021 was determined using the Black-Scholes model based on the following weighted-average assumptions: (i) expected life of 6.5 years, (ii) expected volatility of 73.74%, (iii) risk-free rate of 1.44%, and (iv) no quarterly dividends. Certain performance-based awards contain market condition components and are valued on the date of grant using a Monte Carlo simulation model. For certain restricted stock unit grants with guaranteed minimum payouts and CPSUs, the Company recognized liabilities totaling approximately $3.6 million and $2.4 million as of September 30, 2021 and December 31, 2020, respectively. The Company paid approximately $0.3 million to settle liability classified awards during each of the nine month periods ended September 30, 2021 and 2020. For the three and nine months ended September 30, 2021, the Company recognized, as part of general and administrative expenses, costs for share-based payment arrangements totaling $3.1 million and $8.1 million, respectively, and $2.5 million and $10.7 million for the three and nine months ended September 30, 2020, respectively. As of September 30, 2021, the balance of unamortized share-based compensation expense was $20.6 million, which is expected to be recognized over a weighted-average period of 2.1 years.

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