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Consolidated Statement of Stockholders' Equity - USD ($) $ in Thousands | Total | Common Stock [Member] | Additional Paid-In Capital [Member] | Retained Earnings [Member] | Treasury Stock [Member] | Accumulated Other Comprehensive Income (Loss) [Member]
--- | --- | --- | --- | --- | --- | ---
Beginning balance, shares at Dec. 31, 2014 |  | 109,353,000 |  |  |  |
Beginning balance at Dec. 31, 2014 | $ 1,389,395 | $ 1,094 | $ 813,178 | $ 1,927,445 | $ (1,347,677) | $ (4,645)
Net earnings (loss) | (953,520) |  |  | (953,520) |  |
Total other comprehensive income (loss) | (6,399) |  |  |  |  | (6,399)
Exercise of stock options, shares |  | 66,000 |  |  |  |
Exercise of stock options | 1,485 |  | 1,485 |  |  |
Vesting of restricted share units, shares |  | 23,000 |  |  |  |
Vesting of restricted share units | 0 | $ 0 |  |  |  |
Tax effect of stock awards vested and options expired | (5,865) |  | (5,865) |  |  |
Adjustments to Additional Paid in Capital, Share-based Compensation, Stock Options, Requisite Service Period Recognition | 9,541 |  | 9,541 |  |  |
Dividends declared | (51,047) |  |  | (51,047) |  |
Ending balance, shares at Dec. 31, 2015 |  | 109,442,000 |  |  |  |
Ending balance at Dec. 31, 2015 | 383,590 | $ 1,094 | 818,339 | 922,878 | (1,347,677) | (11,044)
Net earnings (loss) | (105,195) |  |  | (105,195) |  |
Total other comprehensive income (loss) | (5,188) |  |  |  |  | (5,188)
Vesting of restricted share units, shares |  | 77,000 |  |  |  |
Vesting of restricted share units | 0 | $ 1 | (1) |  |  |
Tax effect of stock awards vested and options expired | (440) |  | (440) |  |  |
Adjustments to Additional Paid in Capital, Share-based Compensation, Stock Options, Requisite Service Period Recognition | 9,209 |  | 9,209 |  |  |
Dividends declared | (17,043) |  |  | (17,043) |  |
Ending balance, shares at Dec. 31, 2016 |  | 109,519,000 |  |  |  |
Ending balance at Dec. 31, 2016 | 264,933 | $ 1,095 | 827,107 | 800,640 | (1,347,677) | (16,232)
Net earnings (loss) | 6,653 |  |  | 6,653 |  |
Total other comprehensive income (loss) | $ 5,241 |  |  |  |  | 5,241
Exercise of stock options, shares | 38,830 | 27,000 |  |  |  |
Exercise of stock options | $ 270 |  | 270 |  |  |
Vesting of restricted share units, shares |  | 136,000 |  |  |  |
Vesting of restricted share units | 0 | $ 2 | (2) |  |  |
Adjustments to Additional Paid in Capital, Share-based Compensation, Stock Options, Requisite Service Period Recognition | 3,896 |  | 3,896 |  |  |
Dividends declared | (8,550) |  |  | (8,550) |  |
Ending balance, shares at Dec. 31, 2017 |  | 109,682,000 |  |  |  |
Ending balance at Dec. 31, 2017 | $ 272,443 | $ 1,097 | $ 831,271 | $ 798,743 | $ (1,347,677) | $ (10,991)

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