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CONSOLIDATED STATEMENT OF STOCKHOLDERS' EQUITY (Unaudited) - 6 months ended Jun. 30, 2018 - USD ($) shares in Thousands, $ in Thousands | Common Stock | Capital in Excess of Par Value | Retained Earnings | Accumulated Other Comprehensive Loss | Total
--- | --- | --- | --- | --- | ---
Balance at Dec. 31, 2017 | $ 21,654 |  | $ 906,745 | $ (16,702) | $ 911,697
Balance (in shares) at Dec. 31, 2017 | 216,544 |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |
Stock issued for stock incentive plans, net | $ 42 | $ 4,544 |  |  | 4,586
Stock issued for stock incentive plans, net (in shares) | 416 |  |  |  |
Stock purchased and retired | $ (213) | $ (4,544) | (35,339) |  | (40,096)
Stock purchased and retired (in shares) | (2,133) |  |  |  |
Net income |  |  | 112,073 |  | 112,073
Dividends |  |  | (43,186) |  | (43,186)
Pension adjustment, net of taxes |  |  |  | 328 | 328
Foreign currency translation |  |  |  | (415) | (415)
Balance at Jun. 30, 2018 | $ 21,483 |  | 940,308 | (16,804) | $ 944,987
Balance (in shares) at Jun. 30, 2018 | 214,827 |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |
Adoption of accounting standard (Note 2) |  |  | $ 15 | $ (15) |

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