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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 | $ 3,486 |  | $ 64,141 | $ (2,182) | $ 65,445
Balance (in shares) at Dec. 31, 2016 | 34,855,000 |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |
Stock issued for stock incentive plans, net | $ 18 | $ 2,664 |  |  | 2,682
Stock issued for stock incentive plans, net (in shares) | 184,000 |  |  |  |
Stock purchased and retired | $ (47) | (2,664) | (3,810) |  | (6,521)
Stock purchased and retired (in shares) | (467,000) |  |  |  |
Net income |  |  | 19,300 |  | 19,300
Pension adjustment, net of taxes |  |  |  | 215 | 215
Unrealized gain (loss) on securities, net of taxes and reclassification adjustment |  |  |  | (13) | (13)
Dividends declared |  |  | (11,504) |  | (11,504)
Balance at Dec. 31, 2017 | $ 3,457 |  | 68,127 | (1,980) | 69,604
Balance (in shares) at Dec. 31, 2017 | 34,572,000 |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |
Stock issued for stock incentive plans, net | $ 19 | 2,070 |  |  | 2,089
Stock issued for stock incentive plans, net (in shares) | 190,000 |  |  |  |
Stock purchased and retired | $ (43) | (2,070) | (5,409) |  | (7,522)
Stock purchased and retired (in shares) | (434,000) |  |  |  |
Net income |  |  | 28,488 |  | 28,488
Pension adjustment, net of taxes |  |  |  | (242) | (242)
Unrealized gain (loss) on securities, net of taxes and reclassification adjustment |  |  |  | 47 | 47
Dividends declared |  |  | (17,252) |  | (17,252)
Balance at Dec. 31, 2018 | $ 3,433 |  | 73,954 | (2,175) | $ 75,212
Balance (in shares) at Dec. 31, 2018 | 34,328,000 |  |  |  | 34,328,486
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |
Stock issued for stock incentive plans, net | $ 13 | 2,110 |  |  | $ 2,123
Stock issued for stock incentive plans, net (in shares) | 129,000 |  |  |  |
Stock purchased and retired | $ (59) | $ (2,110) | (6,278) |  | (8,447)
Stock purchased and retired (in shares) | (587,000) |  |  |  |
Net income |  |  | 28,239 |  | 28,239
Pension adjustment, net of taxes |  |  |  | (166) | (166)
Unrealized gain (loss) on securities, net of taxes and reclassification adjustment |  |  |  | 7 | 7
Dividends declared |  |  | (19,756) |  | (19,756)
Balance at Dec. 31, 2019 | $ 3,387 |  | 76,573 | (2,748) | $ 77,212
Balance (in shares) at Dec. 31, 2019 | 33,870,000 |  |  |  | 33,869,817
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |
Adoption of accounting standard (Note 1) |  |  | $ 414 | $ (414) |

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