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Stock-based Compensation | 12 Months Ended
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Dec. 31, 2019
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract] |
Stock-based Compensation | 11. Stock-based Compensation The Company uses share-based payments to compensate employees and non-employee directors. The Company recognizes the cost of share-based payments under the fair-value-based method. Share-based awards include equity instruments in the form of stock options, restricted stock or restricted stock units that have included service conditions and, in certain cases, performance conditions. The Company’s share-based awards also include share-settled performance unit awards. Share-settled performance unit awards are accounted for as equity awards. The Company issues shares of common stock when vested stock options are exercised, when restricted stock is granted and when restricted stock units and share-settled performance unit awards vest. The Patterson-UTI Energy, Inc. 2014 Long-Term Incentive Plan (the “2014 Plan”) was originally approved by the Company’s stockholders effective as of April 17, 2014 and authorized 9.1 million shares for issuance. The Board of Directors adopted a resolution that no future grants would be made under any of the Company’s other previously existing plans. On June 29, 2017, the Company’s stockholders approved the amendment and restatement of the 2014 Plan (the “Amended and Restated Plan”) to increase the number of shares available under the plan by 9.8 million shares. On June 6, 2019, the Company’s stockholders approved an amendment to the Amended and Restated Plan to increase the number of shares available for issuance under the plan by 9.5 million shares and to extend the latest date on which awards may be granted under the Amended and Restated Plan to June 6, 2029 (the “Amendment” and the Amended and Restated Plan, as amended by the Amendment, the “Plan”). The aggregate number of shares of the Company’s common stock authorized for grant under the Plan is 28.4 million. The Company’s share-based compensation plans at December 31, 2019 are as follows:
|  | Shares |  |  | Shares Underlying |  |  | Shares |
|  | Authorized |  |  | Awards |  |  | Available |
Plan Name |  | for Grant |  |  | Outstanding |  |  | for Grant |
Amended and Restated Plan |  |  | 28,400,000 |  |  |  | 6,320,440 |  |  |  | 8,331,502 |
Patterson-UTI Energy, Inc. 2005 Long-Term Incentive Plan, as amended |  |  | — |  |  |  | 2,533,500 |  |  |  | — |
A summary of the Plan follows:
| • | The Compensation Committee of the Board of Directors administers the Plan other than the awards to directors.
| • | All employees, officers and directors are eligible for awards.
| • | The Compensation Committee determines the vesting schedule for awards. Awards typically vest over one year for non-employee directors and three years for employees.
| • | The Compensation Committee sets the term of awards and no option term can exceed 10 years.
| • | All options granted under the Plan are granted with an exercise price equal to or greater than the fair market value of the Company’s common stock at the time the option is granted.
| • | The Plan provides for awards of incentive stock options, non-incentive stock options, tandem and freestanding stock appreciation rights, restricted stock awards, other stock unit awards, performance share awards, performance unit awards and dividend equivalents. As of December 31, 2019, non-incentive stock options, restricted stock awards, restricted stock units and performance unit awards had been granted under the Plan.
Options granted under the Patterson-UTI Energy, Inc. 2005 Long-Term Incentive Plan typically vested over one year for non-employee directors and three years for employees. All options were granted with an exercise price equal to the fair market value of the related common stock at the time of grant. Stock Options—The Company estimates the grant date fair values of stock options using the Black-Scholes-Merton valuation model. Volatility assumptions are based on the historic volatility of the Company’s common stock over the most recent period equal to the expected term of the options as of the date such options are granted. The expected term assumptions are based on the Company’s experience with respect to employee stock option activity. Dividend yield assumptions are based on the expected dividends at the time the options are granted. The risk-free interest rate assumptions are determined by reference to United States Treasury yields. No options were granted during the years ended December 31, 2019, 2018 and 2017. Stock option activity for the year ended December 31, 2019 follows:
|  |  |  |  |  | Weighted Average |
|  | Shares |  |  | Exercise Price Per Share |
Outstanding at beginning of year |  |  | 5,501,150 |  |  | $ | 19.63 |
Exercised |  |  | (700,000 | ) |  | $ | 13.17 |
Expired |  |  | (35,000 | ) |  | $ | 14.95 |
Outstanding at end of year |  |  | 4,766,150 |  |  | $ | 20.62 |
Exercisable at end of year |  |  | 4,736,150 |  |  | $ | 20.63 |
Options outstanding at December 31, 2019 have no intrinsic value and a weighted-average remaining contractual term of 3.62 years. Options exercisable at December 31, 2019 have no intrinsic value and a weighted-average remaining contractual term of 3.60 years. Additional information with respect to options granted, vested and exercised during the years ended December 31, 2019, 2018 and 2017 follows (in thousands, except per share data):
|  | 2019 |  |  | 2018 |  |  | 2017 |
Weighted-average grant date fair value of stock options granted (per share) |  | NA |  |  | NA |  |  | NA |
Aggregate grant date fair value of stock options vested during the year |  | $ | 543 |  |  | $ | 1,954 |  |  | $ | 4,565 |
Aggregate intrinsic value of stock options exercised |  | $ | — |  |  | $ | — |  |  | $ | 209 |
As of December 31, 2019, options to purchase 30,000 shares were outstanding and not vested. All of these non-vested options are expected to ultimately vest. Additional information as of December 31, 2019 with respect to these non-vested options follows (dollars in thousands):
Aggregate intrinsic value |  | $ | — |
Weighted-average remaining contractual term |  | 6.71 years |
Weighted-average remaining expected term |  | 1.71 years |
Weighted-average remaining vesting period |  | 1.71 years |
Unrecognized compensation cost |  | $ | 151 |
Restricted Stock—For all restricted stock awards made to date, shares of common stock were issued when the awards were made. Non-vested shares are subject to forfeiture for failure to fulfill service conditions and, in certain cases, performance conditions. Non-forfeitable dividends are paid on non-vested shares of restricted stock. The Company uses the straight-line method to recognize periodic compensation cost over the vesting period. Restricted stock activity for the year ended December 31, 2019 follows:
|  |  |  |  |  | Weighted Average |
|  |  |  |  |  | Grant Date Fair |
|  | Shares |  |  | Value Per Share |
Non-vested restricted stock outstanding at beginning of year |  |  | 436,224 |  |  | $ | 21.41 |
Vested |  |  | (362,673 | ) |  | $ | 21.38 |
Forfeited |  |  | (1,500 | ) |  | $ | 21.71 |
Non-vested restricted stock outstanding at end of year |  |  | 72,051 |  |  | $ | 21.59 |
As of December 31, 2019, approximately 72,000 shares of non-vested restricted stock outstanding are expected to vest. Additional information as of December 31, 2019 with respect to these non-vested shares follows (dollars in thousands):
Aggregate intrinsic value |  | $ | 757 |
Weighted-average remaining vesting period |  | .3 year |
Unrecognized compensation cost |  | $ | 1,247 |
Restricted Stock Units—For all restricted stock unit awards made to date, shares of common stock are not issued until the units vest. Restricted stock units are subject to forfeiture for failure to fulfill service conditions and, in certain cases, performance conditions. Forfeitable dividend equivalents are accrued on certain restricted stock units that will be paid upon vesting. The Company uses the straight-line method to recognize periodic compensation cost over the vesting period. Restricted stock unit activity for the year ended December 31, 2019 follows:
|  |  |  |  |  |  |  |  |  | Weighted Average |
|  | Time |  |  | Performance |  |  | Grant Date Fair |
|  | Based |  |  | Based |  |  | Value Per Share |
Non-vested restricted stock units outstanding at beginning of year |  |  | 2,602,608 |  |  |  | 435,315 |  |  | $ | 18.95 |
Granted |  |  | 1,505,048 |  |  |  | — |  |  | $ | 12.40 |
Vested (1) |  |  | (1,135,231 | ) |  |  | (38,000 | ) |  | $ | 19.19 |
Forfeited |  |  | (340,699 | ) |  |  | — |  |  | $ | 17.08 |
Non-vested restricted stock units outstanding at end of year |  |  | 2,631,726 |  |  |  | 397,315 |  |  | $ | 15.81 |
(1) | All of the performance-based restricted stock units that vested during 2019 were granted in 2017.
As of December 31, 2019, approximately 2.9 million non-vested restricted stock units outstanding are expected to vest. Additional information as of December 31, 2019 with respect to these non-vested restricted stock units follows (dollars in thousands):
Aggregate intrinsic value |  | $ | 30,938 |
Weighted-average remaining vesting period |  | 1.9 years |
Unrecognized compensation cost |  | $ | 36,933 |
Performance Unit Awards. The Company has granted share-settled performance unit awards to certain employees (the “Performance Units”) on an annual basis since 2010. The Performance Units provide for the recipients to receive a grant of shares of common stock upon the achievement of certain performance goals during a specified period established by the Compensation Committee. The performance period for the Performance Units is the three year period commencing on April 1 of the year of grant, except that for the Performance Units granted in 2017 the three-year performance period commenced on May 1. The performance goals for the Performance Units are tied to the Company’s total shareholder return for the performance period as compared to total shareholder return for a peer group determined by the Compensation Committee. These goals are considered to be market conditions under the relevant accounting standards and the market conditions were factored into the determination of the fair value of the respective Performance Units. For the Performance Units granted in May 2017 and April 2018, the recipients will receive a target number of shares if the Company’s total shareholder return during the performance period, when compared to the peer group, is at the 50th percentile. For the Performance Units granted in April 2019, the recipients will receive the target number of shares if the Company’s total shareholder return during the performance period, when compared to the peer group, is at the 55th percentile. If the Company’s total shareholder return during the performance period, when compared to the peer group, is at the 75th percentile or higher, then the recipients will receive two times the target number of shares. If the Company’s total shareholder return during the performance period, when compared to the peer group, is at the 25th percentile, then the recipients will only receive one-half of the target number of shares. If the Company’s total shareholder return during the performance period, when compared to the peer group, is between the 25th and target percentile, or the target and 75th percentile, then the shares to be received by the recipients will be determined using linear interpolation for levels of achievement between these points. For the Performance Units awarded prior to 2016, there was no payout unless the Company’s total shareholder return was positive and, when compared to the peer group was at or above the 25th percentile. For the Performance Units granted in April 2016, if the Company’s total shareholder return was negative, and, when compared to the peer group was at or above the 25th percentile, then the recipients would receive one-half of the number of shares they would have received had the Company’s total shareholder return been positive. For the Performance Units granted in May 2017 and April 2018, the payout is based on relative performance and does not have an absolute performance requirement. For the Performance Units granted in April 2019, the payout shall not exceed the target number of shares if the Company’s total shareholder return is negative or zero. The total target number of shares with respect to the Performance Units for the years 2014-2019 is set forth below:
|  | 2019 |  |  | 2018 |  |  | 2017 |  |  | 2016 |  |  | 2015 |  |  | 2014 |
|  | Performance |  |  | Performance |  |  | Performance |  |  | Performance |  |  | Performance |  |  | Performance |
|  | Unit Awards |  |  | Unit Awards |  |  | Unit Awards |  |  | Unit Awards |  |  | Unit Awards |  |  | Unit Awards |
Target number of shares |  |  | 489,800 |  |  |  | 310,700 |  |  |  | 186,198 |  |  |  | 185,000 |  |  |  | 190,600 |  |  |  | 154,000 |
The 2014 Performance Units settled with a negative total shareholder return, so there was no payout under such Performance Units. In April 2018, 381,200 shares were issued to settle the 2015 Performance Units. In April 2019, 185,000 shares were issued to settle the 2016 Performance Units. The Performance Units granted in 2017, 2018, and 2019 have not reached the end of their respective performance periods. Because the Performance Units are share-settled awards, they are accounted for as equity awards and measured at fair value on the date of grant using a Monte Carlo simulation model. The fair value of the Performance Units is set forth below (in thousands):
|  | 2019 |  |  | 2018 |  |  | 2017 |  |  | 2016 |  |  | 2015 |  |  | 2014 |
|  | Performance |  |  | Performance |  |  | Performance |  |  | Performance |  |  | Performance |  |  | Performance |
|  | Unit Awards |  |  | Unit Awards |  |  | Unit Awards |  |  | Unit Awards |  |  | Unit Awards |  |  | Unit Awards |
Aggregate fair value at date of grant |  | $ | 9,958 |  |  | $ | 8,004 |  |  | $ | 5,780 |  |  | $ | 3,854 |  |  | $ | 4,052 |  |  | $ | 5,388 |
These fair value amounts are charged to expense on a straight-line basis over the performance period. Compensation expense associated with the Performance Units is set forth below (in thousands):
|  | 2019 |  |  | 2018 |  |  | 2017 |  |  | 2016 |  |  | 2015 |  |  | 2014 |
|  | Performance |  |  | Performance |  |  | Performance |  |  | Performance |  |  | Performance |  |  | Performance |
|  | Unit Awards |  |  | Unit Awards |  |  | Unit Awards |  |  | Unit Awards |  |  | Unit Awards |  |  | Unit Awards |
Year ended December 31, 2019 |  | $ | 2,489 |  |  | $ | 2,668 |  |  | $ | 1,927 |  |  | $ | 321 |  |  | NA |  |  | NA |
Year ended December 31, 2018 |  | NA |  |  | $ | 2,001 |  |  | $ | 1,927 |  |  | $ | 1,285 |  |  | $ | 338 |  |  | NA |
Year ended December 31, 2017 |  | NA |  |  | NA |  |  | $ | 1,284 |  |  | $ | 1,285 |  |  | $ | 1,351 |  |  | $ | 449 |
Dividends on Equity Awards – Non-forfeitable cash dividends are paid on restricted stock awards and dividend equivalents are paid or accrued on certain restricted stock units. These dividends are recognized as follows:
| • | Dividends are recognized as reductions of retained earnings for the portion of restricted stock awards expected to vest.
| • | Dividends are recognized as additional compensation cost for the portion of restricted stock awards that are not expected to vest or that ultimately do not vest.
| • | Dividend equivalents are recognized as reductions of retained earnings for the portion of restricted stock units expected to vest.
| • | Dividend equivalents are recognized as additional compensation cost for the portion of restricted stock units that are not expected to vest or that ultimately do not vest.

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