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Stockholders' Equity (Tables) | 12 Months Ended
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Dec. 31, 2020
Equity [Abstract] |
Cash Dividends | Cash Dividends – We paid cash dividends during the years ended December 31, 2020, 2019 and 2018 as follows:
|  | Per Share |  |  | Total |
|  |  |  |  |  | (in thousands) |
2020 |  |  |  |  |  |  |  |
Paid on March 19, 2020 |  | $ | 0.04 |  |  | $ | 7,629 |
Paid on June 18, 2020 |  |  | 0.02 |  |  |  | 3,735 |
Paid on September 17, 2020 |  |  | 0.02 |  |  |  | 3,746 |
Paid on December 17, 2020 |  |  | 0.02 |  |  |  | 3,752 |
Total cash dividends |  | $ | 0.10 |  |  | $ | 18,862 |
2019 |  |  |  |  |  |  |  |
Paid on March 21, 2019 |  | $ | 0.04 |  |  | $ | 8,499 |
Paid on June 20, 2019 |  |  | 0.04 |  |  |  | 8,344 |
Paid on September 19, 2019 |  |  | 0.04 |  |  |  | 7,847 |
Paid on December 19, 2019 |  |  | 0.04 |  |  |  | 7,738 |
Total cash dividends |  | $ | 0.16 |  |  | $ | 32,428 |
2018 |  |  |  |  |  |  |  |
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 |
Paid on December 20, 2018 |  |  | 0.04 |  |  |  | 8,629 |
Total cash dividends |  | $ | 0.14 |  |  | $ | 30,589 |
Treasury Stock Acquisition | Treasury stock acquisitions during the years ended December 31, 2020, 2019 and 2018 were as follows (dollars in thousands):
|  | 2020 |  |  | 2019 |  |  | 2018 |
|  | Shares |  |  | Cost |  |  | Shares |  |  | Cost |  |  | Shares |  |  | Cost |
Treasury shares at beginning of period |  |  | 77,336,387 |  |  | $ | 1,345,134 |  |  |  | 53,701,096 |  |  | $ | 1,080,448 |  |  |  | 43,802,611 |  |  | $ | 918,711 |
Purchases pursuant to stock buyback program |  |  | 5,826,266 |  |  |  | 20,000 |  |  |  | 22,566,331 |  |  |  | 250,109 |  |  |  | 9,331,131 |  |  |  | 150,497 |
Acquisitions pursuant to long-term incentive plan |  |  | 239,669 |  |  |  | 1,179 |  |  |  | 1,037,947 |  |  |  | 14,205 |  |  |  | 567,354 |  |  |  | 11,240 |
Other |  |  | — |  |  |  | — |  |  |  | 31,013 |  |  |  | 372 |  |  |  | — |  |  |  | — |
Treasury shares at end of period |  |  | 83,402,322 |  |  | $ | 1,366,313 |  |  |  | 77,336,387 |  |  | $ | 1,345,134 |  |  |  | 53,701,096 |  |  | $ | 1,080,448 |

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