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CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($) shares in Thousands, $ in Thousands | Common Stock | Capital in Excess of Par Value | Retained Earnings | Accumulated Other Comprehensive (Loss) Income | Total
--- | --- | --- | --- | --- | ---
Balance at Dec. 31, 2019 | $ 21,443 |  | $ 832,113 | $ (23,223) | $ 830,333
Balance (in shares) at Dec. 31, 2019 | 214,423 |  |  |  |
Increase (Decrease) in Stockholders' Equity |  |  |  |  |
Stock issued for stock incentive plans, net | $ 100 | $ 1,997 |  |  | 2,097
Stock issued for stock incentive plans, net (in shares) | 1,014 |  |  |  |
Stock purchased and retired | $ (17) | (1,997) | 1,222 |  | (792)
Stock purchased and retired (in shares) | (177) |  |  |  |
Net loss |  |  | (160,423) |  | (160,423)
Pension adjustment, net of taxes |  |  |  | 732 | 732
Foreign currency translation |  |  |  | (712) | (712)
Balance at Mar. 31, 2020 | $ 21,526 |  | 672,912 | (23,203) | 671,235
Balance (in shares) at Mar. 31, 2020 | 215,260 |  |  |  |
Balance at Dec. 31, 2019 | $ 21,443 |  | 832,113 | (23,223) | 830,333
Balance (in shares) at Dec. 31, 2019 | 214,423 |  |  |  |
Increase (Decrease) in Stockholders' Equity |  |  |  |  |
Net loss |  |  |  |  | (185,516)
Foreign currency translation |  |  |  |  | (398)
Balance at Jun. 30, 2020 | $ 21,512 |  | 649,844 | (22,703) | 648,653
Balance (in shares) at Jun. 30, 2020 | 215,123 |  |  |  |
Balance at Mar. 31, 2020 | $ 21,526 |  | 672,912 | (23,203) | 671,235
Balance (in shares) at Mar. 31, 2020 | 215,260 |  |  |  |
Increase (Decrease) in Stockholders' Equity |  |  |  |  |
Stock issued for stock incentive plans, net | $ (4) | 2,021 |  |  | 2,017
Stock issued for stock incentive plans, net (in shares) | (135) |  |  |  |
Stock purchased and retired | $ (10) | (2,021) | 2,025 |  | (6)
Stock purchased and retired (in shares) | (2) |  |  |  |
Net loss |  |  | (25,093) |  | (25,093)
Pension adjustment, net of taxes |  |  |  | 186 | 186
Foreign currency translation |  |  |  | 314 | 314
Balance at Jun. 30, 2020 | $ 21,512 |  | 649,844 | (22,703) | 648,653
Balance (in shares) at Jun. 30, 2020 | 215,123 |  |  |  |
Balance at Dec. 31, 2020 | $ 21,495 |  | 627,778 | (17,706) | 631,567
Balance (in shares) at Dec. 31, 2020 | 214,951 |  |  |  |
Increase (Decrease) in Stockholders' Equity |  |  |  |  |
Stock issued for stock incentive plans, net | $ 93 | 1,446 |  |  | 1,539
Stock issued for stock incentive plans, net (in shares) | 924 |  |  |  |
Stock purchased and retired | $ (14) | (1,446) | 903 |  | (557)
Stock purchased and retired (in shares) | (140) |  |  |  |
Net loss |  |  | (9,662) |  | (9,662)
Pension adjustment, net of taxes |  |  |  | 153 | 153
Foreign currency translation |  |  |  | 136 | 136
Balance at Mar. 31, 2021 | $ 21,574 |  | 619,019 | (17,417) | 623,176
Balance (in shares) at Mar. 31, 2021 | 215,735 |  |  |  |
Balance at Dec. 31, 2020 | $ 21,495 |  | 627,778 | (17,706) | 631,567
Balance (in shares) at Dec. 31, 2020 | 214,951 |  |  |  |
Increase (Decrease) in Stockholders' Equity |  |  |  |  |
Net loss |  |  |  |  | (10,388)
Foreign currency translation |  |  |  |  | 205
Balance at Jun. 30, 2021 | $ 21,573 |  | 619,756 | (17,195) | 624,134
Balance (in shares) at Jun. 30, 2021 | 215,725 |  |  |  |
Balance at Mar. 31, 2021 | $ 21,574 |  | 619,019 | (17,417) | 623,176
Balance (in shares) at Mar. 31, 2021 | 215,735 |  |  |  |
Increase (Decrease) in Stockholders' Equity |  |  |  |  |
Stock issued for stock incentive plans, net | $ (1) | 1,472 |  |  | 1,471
Stock issued for stock incentive plans, net (in shares) | (9) |  |  |  |
Stock purchased and retired |  | $ (1,472) | 1,463 |  | (9)
Stock purchased and retired (in shares) | (1) |  |  |  |
Net loss |  |  | (726) |  | (726)
Pension adjustment, net of taxes |  |  |  | 153 | 153
Foreign currency translation |  |  |  | 69 | 69
Balance at Jun. 30, 2021 | $ 21,573 |  | $ 619,756 | $ (17,195) | $ 624,134
Balance (in shares) at Jun. 30, 2021 | 215,725 |  |  |  |

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