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Capital Stock (Tables) | 9 Months Ended
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Sep. 30, 2022
Equity [Abstract] |
Common Stock Activity | Common stock activity is summarized as follows:
| Three Months Ended September 30, 2022 |  | Three Months Ended September 30, 2021
(In thousands) | Common Stock |  | Treasury Cost |  | Common Stock |  | Treasury Cost
Balance at beginning of period | $ | 267,645 |  |  | $ | (359,314) |  |  | $ | 253,773 |  |  | $ | (329,439) |
Stock compensation expense | 2,967 |  |  | — |  |  | 2,867 |  |  | — |
Restricted and performance stock awards | (103) |  |  | 103 |  |  | (159) |  |  | 159 |
Stock options exercised | 2,501 |  |  | 1,364 |  |  | 354 |  |  | 155 |
Treasury shares purchased for stock compensation programs | — |  |  | (59) |  |  | — |  |  | (625) |
Acquisition of noncontrolling interest in consolidated subsidiaries | — |  |  | — |  |  | (4,751) |  |  | — |
Share repurchase program | — |  |  | (2,150) |  |  | — |  |  | — |
Balance at end of period | $ | 273,010 |  |  | $ | (360,056) |  |  | $ | 252,084 |  |  | $ | (329,750) |
| Nine Months Ended September 30, 2022 |  | Nine Months Ended September 30, 2021
(In thousands) | Common Stock |  | Treasury Cost |  | Common Stock |  | Treasury Cost
Balance at beginning of period | $ | 260,121 |  |  | $ | (328,776) |  |  | $ | 242,693 |  |  | $ | (326,156) |
Stock compensation expense | 11,325 |  |  | — |  |  | 13,562 |  |  | — |
Restricted and performance stock awards | (1,564) |  |  | 1,564 |  |  | (1,662) |  |  | 1,662 |
Stock options exercised | 2,704 |  |  | 1,459 |  |  | 1,833 |  |  | 838 |
Treasury shares purchased for stock compensation programs | — |  |  | (3,990) |  |  | — |  |  | (6,137) |
Acquisition of noncontrolling interest in consolidated subsidiaries | — |  |  | — |  |  | (4,751) |  |  | — |
Employee stock purchase program | 424 |  |  | 62 |  |  | 409 |  |  | 43 |
Share repurchase program | — |  |  | (30,375) |  |  | — |  |  | — |
Balance at end of period | $ | 273,010 |  |  | $ | (360,056) |  |  | $ | 252,084 |  |  | $ | (329,750) |

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