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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, 2017 | $ 708,928 | $ 544 | $ 62,594 | $ 948,411 | $ (140,675) | $ (161,946)
Reclassification pursuant to ASU No. 2018-02 |  |  |  | 22,298 | (22,298) |
Net income (loss) | (97,512) |  |  | (97,512) |  |
Other comprehensive income (loss) | 8,338 |  |  |  | 8,338 |
Comprehensive income (loss) | (89,174) |  |  |  |  |
Cash dividends declared | (17,079) |  |  | (17,079) |  |
Share-based compensation expense | 4,594 |  | 4,594 |  |  |
Delivery of treasury shares |  |  |  |  |  |
RSUs and PSAs | (483) |  | (2,397) |  |  | 1,914
Employee stock options exercised — net | (540) |  | (1,162) |  |  | 622
Ending Balance at Sep. 30, 2018 | 606,246 | 544 | 63,629 | 856,118 | (154,635) | (159,410)
Beginning Balance at Jun. 30, 2018 | 686,952 | 544 | 62,827 | 957,643 | (174,606) | (159,456)
Net income (loss) | (95,831) |  |  | (95,831) |  |
Other comprehensive income (loss) | 19,971 |  |  |  | 19,971 |
Comprehensive income (loss) | (75,860) |  |  |  |  |
Cash dividends declared | (5,694) |  |  | (5,694) |  |
Share-based compensation expense | 890 |  | 890 |  |  |
Delivery of treasury shares |  |  |  |  |  |
RSUs and PSAs | (7) |  | (21) |  |  | 14
Employee stock options exercised — net | (35) |  | (67) |  |  | 32
Ending Balance at Sep. 30, 2018 | 606,246 | 544 | 63,629 | 856,118 | (154,635) | (159,410)
Beginning Balance at Dec. 31, 2018 | 538,898 | 544 | 62,239 | 770,305 | (137,440) | (156,750)
Net income (loss) | 23,341 |  |  | 23,341 |  |
Other comprehensive income (loss) | (8,187) |  |  |  | (8,187) |
Comprehensive income (loss) | 15,154 |  |  |  |  |
Cash dividends declared | (17,222) |  |  | (17,222) |  |
Share-based compensation expense | 2,683 |  | 2,683 |  |  |
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 Sep. 30, 2019 | 538,757 | 544 | 60,965 | 776,424 | (145,627) | (153,549)
Beginning Balance at Jun. 30, 2019 | 543,119 | 544 | 59,920 | 769,940 | (133,736) | (153,549)
Net income (loss) | 12,224 |  |  | 12,224 |  |
Other comprehensive income (loss) | (11,891) |  |  |  | (11,891) |
Comprehensive income (loss) | 333 |  |  |  |  |
Cash dividends declared | (5,740) |  |  | (5,740) |  |
Share-based compensation expense | 1,045 |  | 1,045 |  |  |
Ending Balance at Sep. 30, 2019 | $ 538,757 | $ 544 | $ 60,965 | $ 776,424 | $ (145,627) | $ (153,549)

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