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Consolidated statements of changes in equity - USD ($) $ in Thousands | Total | Common stock [member] | Treasury stock [member] | Additional paid-in capital in excess of assigned value of common stock [member] | Capital reserves [member] | Retained earnings [member] | Accumulated other comprehensive income (loss) [member]
--- | --- | --- | --- | --- | --- | --- | ---
Balance at Dec. 31, 2014 | $ 911,039 |  | $ 279,980 | $ (77,627) | $ 119,644 | $ 95,210 | $ 501,669 | $ (7,837)
Profit for the year | 103,984 | [1] | 0 | 0 | 0 | 0 | 103,984 | 0
Other comprehensive income | (2,844) |  | 0 | 0 | 0 | 0 | 0 | (2,844)
Issuance of restricted stock | 0 |  | 0 | 1,259 | (1,259) | 0 | 0 | 0
Compensation cost - stock options and stock units plans | 3,296 |  | 0 | 0 | 3,296 | 0 | 0 | 0
Exercised options and stock units vested | 1,467 |  | 0 | 2,971 | (1,504) | 0 | 0 | 0
Repurchase of "Class B" and "Class E" common stock | 0 |  | 0 | 0 | 0 | 0 | 0 | 0
Dividends declared | (45,011) |  | 0 | 0 | 0 | 0 | (45,011) | 0
Balance at Dec. 31, 2015 | 971,931 |  | 279,980 | (73,397) | 120,177 | 95,210 | 560,642 | (10,681)
Profit for the year | 87,045 | [1] | 0 | 0 | 0 | 0 | 87,045 | 0
Other comprehensive income | 7,880 |  | 0 | 0 | 0 | 0 | 0 | 7,880
Issuance of restricted stock | 0 |  | 0 | 1,259 | (1,259) | 0 | 0 | 0
Compensation cost - stock options and stock units plans | 3,063 |  | 0 | 0 | 3,063 | 0 | 0 | 0
Exercised options and stock units vested | 1,575 |  | 0 | 2,962 | (1,387) | 0 | 0 | 0
Repurchase of "Class B" and "Class E" common stock | 0 |  | 0 | 0 | 0 | 0 | 0 | 0
Dividends declared | (60,180) |  | 0 | 0 | 0 | 0 | (60,180) | 0
Balance at Dec. 31, 2016 | 1,011,314 |  | 279,980 | (69,176) | 120,594 | 95,210 | 587,507 | (2,801)
Profit for the year | 81,999 | [1] | 0 | 0 | 0 | 0 | 81,999 | 0
Other comprehensive income | 4,764 |  | 0 | 0 | 0 | 0 | 0 | 4,764
Issuance of restricted stock | 30 |  | 0 | 1,259 | (1,229) | 0 | 0 | 0
Compensation cost - stock options and stock units plans | 296 |  | 0 | 0 | 296 | 0 | 0 | 0
Exercised options and stock units vested | 4,977 |  | 0 | 4,697 | 280 | 0 | 0 | 0
Repurchase of "Class B" and "Class E" common stock | (28) |  | 0 | (28) | 0 | 0 | 0 | 0
Dividends declared | (60,540) |  | 0 | 0 | 0 | 0 | (60,540) | 0
Balance at Dec. 31, 2017 | $ 1,042,812 |  | $ 279,980 | $ (63,248) | $ 119,941 | $ 95,210 | $ 608,966 | $ 1,963
[1] | The numbers set out in these tables have been rounded and accordingly may not total exactly.

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