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Stockholders’ Equity (Tables) | 12 Months Ended
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Dec. 31, 2022
Equity [Abstract] |
Treasury Stock Acquisition | Treasury stock acquisitions during the years ended December 31, 2022, 2021 and 2020 were as follows (dollars in thousands):
|  | 2022 |  |  | 2021 |  |  | 2020 |
|  | Shares |  |  | Cost |  |  | Shares |  |  | Cost |  |  | Shares |  |  | Cost |
Treasury shares at beginning of period |  |  | 84,128,995 |  |  | $ | 1,372,641 |  |  |  | 83,402,322 |  |  | $ | 1,366,313 |  |  |  | 77,336,387 |  |  | $ | 1,345,134 |
Purchases pursuant to stock buyback program |  |  | 3,254,599 |  |  |  | 57,173 |  |  |  | — |  |  |  | — |  |  |  | 5,826,266 |  |  |  | 20,000 |
Acquisitions pursuant to long-term incentive plan |  |  | 1,372,101 |  |  |  | 23,237 |  |  |  | 451,196 |  |  |  | 3,727 |  |  |  | 239,669 |  |  |  | 1,179 |
Purchases in connection with Pioneer acquisition |  |  | — |  |  |  | — |  |  |  | 275,477 |  |  |  | 2,601 |  |  |  | — |  |  |  | — |
Other |  |  | 3,027 |  |  |  | 28 |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |
Treasury shares at end of period |  |  | 88,758,722 |  |  | $ | 1,453,079 |  |  |  | 84,128,995 |  |  | $ | 1,372,641 |  |  |  | 83,402,322 |  |  | $ | 1,366,313 |

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