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Stockholders' Equity (Tables) | 9 Months Ended
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Sep. 30, 2018
Equity [Abstract] |
Cash Dividends | Cash Dividends — The Company pai d cash dividends during the nine months ended September 30, 2018 and 2017 as follows:
2018: | Per Share |  |  | Total |
|  |  |  |  | (in thousands) |
Paid on March 22, 2018 | $ | 0.02 |  |  | $ | 4,443 |
Paid on June 21, 2018 |  | 0.04 |  |  |  | 8,832 |
Paid on September 20, 2018 |  | 0.04 |  |  |  | 8,685 |
| $ | 0.10 |  |  | $ | 21,960 |
2017: | Per Share |  |  | Total |
|  |  |  |  | (in thousands) |
Paid on March 22, 2017 | $ | 0.02 |  |  | $ | 3,326 |
Paid on June 22, 2017 |  | 0.02 |  |  |  | 4,269 |
Paid on September 21, 2017 |  | 0.02 |  |  |  | 4,271 |
Total cash dividends | $ | 0.06 |  |  | $ | 11,866 |
Treasury Stock Acquisition | Treasury stock acquisitions during the nine months ended September 30, 2018 were as follows (dollars in thousands):
| Shares |  |  | Cost |
Treasury shares at beginning of period |  | 43,802,611 |  |  | $ | 918,711 |
Purchases pursuant to stock buyback program |  | 5,515,853 |  |  |  | 100,500 |
Acquisitions pursuant to long-term incentive plan (1) |  | 561,807 |  |  |  | 11,155 |
Treasury shares at end of period |  | 49,880,271 |  |  | $ | 1,030,366 |
| (1) | The Company withheld 561,807 shares in the nine months ended September 30, 2018 with respect to employees’ tax withholding obligations upon vesting of restricted shares. These shares were acquired at fair market value pursuant to the terms of the Patterson-UTI Energy, Inc. 2014 Long-Term Incentive Plan and not pursuant to the stock buyback program.

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