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Statements of Shareholders' Equity - USD ($) $ in Thousands | Total | Common Stock [Member] | Capital in Excess of Par Value [Member] | Retained Earnings [Member] | Accumulated Other Comprehensive Loss [Member] | Treasury Stock [Member]
--- | --- | --- | --- | --- | --- | ---
Beginning Balance at Dec. 31, 2018 | $ 538,898 | $ 544 | $ 62,239 | $ 770,305 | $ (137,440) | $ (156,750)
Net income (loss) | 11,117 |  |  | 11,117 |  |
Other comprehensive income (loss) | 3,704 |  |  |  | 3,704 |
Comprehensive income (loss) | 14,821 |  |  |  |  |
Cash dividends declared | (11,482) |  |  | (11,482) |  |
Share-based compensation expense | 1,638 |  | 1,638 |  |  |
Delivery of treasury shares |  |  |  |  |  |
RSUs and PSAs | (324) |  | (2,421) |  |  | 2,097
Employee stock options exercised — net | (432) |  | (1,536) |  |  | 1,104
Ending Balance at Jun. 30, 2019 | 543,119 | 544 | 59,920 | 769,940 | (133,736) | (153,549)
Beginning Balance at Mar. 31, 2019 | 536,188 | 544 | 60,565 | 769,857 | (139,535) | (155,243)
Net income (loss) | 5,831 |  |  | 5,831 |  |
Other comprehensive income (loss) | 5,799 |  |  |  | 5,799 |
Comprehensive income (loss) | 11,630 |  |  |  |  |
Cash dividends declared | (5,748) |  |  | (5,748) |  |
Share-based compensation expense | 1,161 |  | 1,161 |  |  |
Delivery of treasury shares |  |  |  |  |  |
RSUs and PSAs | (2) |  | (1,429) |  |  | 1,427
Employee stock options exercised — net | (110) |  | (377) |  |  | 267
Ending Balance at Jun. 30, 2019 | 543,119 | 544 | 59,920 | 769,940 | (133,736) | (153,549)
Beginning Balance at Dec. 31, 2019 | 555,959 | 544 | 59,900 | 725,795 | (77,896) | (152,384)
Net income (loss) | 4,990 |  |  | 4,990 |  |
Other comprehensive income (loss) | (10,081) |  |  |  | (10,081) |
Comprehensive income (loss) | (5,091) |  |  |  |  |
Cash dividends declared | (11,750) |  |  | (11,750) |  |
Share-based compensation expense | 2,377 |  | 2,377 |  |  |
Delivery of treasury shares |  |  |  |  |  |
RSUs and PSAs | (421) |  | (2,078) |  |  | 1,657
Employee stock options exercised — net | (75) |  | (217) |  |  | 142
Ending Balance at Jun. 30, 2020 | 540,999 | 544 | 59,982 | 719,035 | (87,977) | (150,585)
Beginning Balance at Mar. 31, 2020 | 542,910 | 544 | 59,623 | 727,440 | (93,217) | (151,480)
Net income (loss) | (2,416) |  |  | (2,416) |  |
Other comprehensive income (loss) | 5,240 |  |  |  | 5,240 |
Comprehensive income (loss) | 2,824 |  |  |  |  |
Cash dividends declared | (5,989) |  |  | (5,989) |  |
Share-based compensation expense | 1,292 |  | 1,292 |  |  |
Delivery of treasury shares |  |  |  |  |  |
RSUs and PSAs | (15) |  | (865) |  |  | 850
Employee stock options exercised — net | (23) |  | (68) |  |  | 45
Ending Balance at Jun. 30, 2020 | $ 540,999 | $ 544 | $ 59,982 | $ 719,035 | $ (87,977) | $ (150,585)

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