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CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($) $ in Thousands | Common Stock | Capital in Excess of Par Value | Retained Earnings | Accumulated Other Comprehensive Income (Loss) | Total
--- | --- | --- | --- | --- | ---
Balance at Dec. 31, 2016 | $ 21,749 |  | $ 803,152 | $ (18,102) | $ 806,799
Balance (in shares) at Dec. 31, 2016 | 217,489,000 |  |  |  |
Increase (Decrease) in Stockholders' Equity |  |  |  |  |
Stock issued for stock incentive plans, net | $ 42 | $ 11,048 |  |  | 11,090
Stock issued for stock incentive plans, net (in shares) | 420,000 |  |  |  |
Stock purchased and retired | $ (137) | (11,048) | (15,599) |  | (26,784)
Stock purchased and retired (in shares) | (1,365,000) |  |  |  |
Net (loss) income |  |  | 162,511 |  | 162,511
Pension adjustment, net of taxes |  |  |  | 1,033 | 1,033
Foreign currency translation |  |  |  | 391 | 391
Unrealized loss on securities; net of taxes and reclassification adjustment |  |  |  | (24) | (24)
Dividends declared |  |  | (43,319) |  | (43,319)
Balance at Dec. 31, 2017 | $ 21,654 |  | 906,745 | (16,702) | 911,697
Balance (in shares) at Dec. 31, 2017 | 216,544,000 |  |  |  |
Increase (Decrease) in Stockholders' Equity |  |  |  |  |
Stock issued for stock incentive plans, net | $ 37 | 9,382 |  |  | 9,419
Stock issued for stock incentive plans, net (in shares) | 367,000 |  |  |  |
Stock purchased and retired | $ (237) | (9,382) | (33,382) |  | (43,001)
Stock purchased and retired (in shares) | (2,367,000) |  |  |  |
Net (loss) income |  |  | 175,402 |  | 175,402
Pension adjustment, net of taxes |  |  |  | (1,408) | (1,408)
Foreign currency translation |  |  |  | (621) | (621)
Dividends declared |  |  | (101,069) |  | (101,069)
Balance at Dec. 31, 2018 | $ 21,454 |  | 947,711 | (18,746) | $ 950,419
Balance (in shares) at Dec. 31, 2018 | 214,544,000 |  |  |  | 214,543,511
Increase (Decrease) in Stockholders' Equity |  |  |  |  |
Adoption of accounting standard (Note 1) |  |  | 15 | (15) |
Stock issued for stock incentive plans, net | $ 66 | 8,564 |  |  | $ 8,630
Stock issued for stock incentive plans, net (in shares) | 667,000 |  |  |  |
Stock purchased and retired | $ (77) | $ (8,564) | 1,280 |  | (7,361)
Stock purchased and retired (in shares) | (788,000) |  |  |  |
Net (loss) income |  |  | (87,111) |  | (87,111)
Pension adjustment, net of taxes |  |  |  | (2,298) | (2,298)
Foreign currency translation |  |  |  | 553 | 553
Dividends declared |  |  | (32,231) |  | (32,231)
Balance at Dec. 31, 2019 | $ 21,443 |  | 832,113 | (23,223) | $ 830,333
Balance (in shares) at Dec. 31, 2019 | 214,423,000 |  |  |  | 214,422,979
Increase (Decrease) in Stockholders' Equity |  |  |  |  |
Adoption of accounting standard (Note 1) |  |  | $ 2,464 | $ (2,732) | $ (268)

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