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Consolidated Statements of Equity - USD ($) $ in Thousands | Total | Common Stock [Member] | Additional Paid-in Capital [Member] | Treasury Stock [Member] | Accumulated Other Comprehensive Income (Loss) [Member] | Retained Earnings [Member] | Noncontrolling Interests' Equity [Member]
--- | --- | --- | --- | --- | --- | --- | ---
Beginning Balance at Dec. 31, 2014 | $ 536,944 | $ 25,640 | $ 139,573 | $ (66,262) | $ (83,945) | $ 520,540 | $ 1,398
Issuance of common stock under stock option plan | 777 | 45 | 732 |  |  |  |
Purchase of common stock | (2,000) |  |  | (2,000) |  |  |
Stock-based and deferred compensation | 3,694 | 24 | 3,854 | (184) |  |  |
Net income | 76,037 |  |  |  |  | 75,968 | 69
Other comprehensive income | (41,210) |  |  |  | (41,143) |  | (67)
Cash dividends paid: |  |  |  |  |  |  |
Common stock | (16,300) |  |  |  |  | (16,300) |
Non-qualified stock option and stock award income tax benefit | 442 |  | 442 |  |  |  |
Ending Balance at Dec. 31, 2015 | 558,384 | 25,709 | 144,601 | (68,446) | (125,088) | 580,208 | 1,400
Issuance of common stock under stock option plan | 4,017 | 168 | 3,849 |  |  |  |
Purchase of common stock | (2,408) |  |  | (2,408) |  |  |
Stock-based and deferred compensation | 9,526 | 18 | 9,592 | (84) |  |  |
Net income | 86,198 |  |  |  |  | 86,191 | 7
Other comprehensive income | (2,472) |  |  |  | (2,377) |  | (95)
Cash dividends paid: |  |  |  |  |  |  |
Common stock | (17,329) |  |  |  |  | (17,329) |
Ending Balance at Dec. 31, 2016 | 635,916 | 25,895 | 158,042 | (70,938) | (127,465) | 649,070 | 1,312
Issuance of common stock under stock option plan | 3,370 | 104 | 3,266 |  |  |  |
Purchase of common stock | (6,000) |  |  | (6,000) |  |  |
Stock-based and deferred compensation | 7,549 | 72 | 9,100 | (1,623) |  |  |
Net income | 91,547 |  |  |  |  | 91,578 | (31)
Other comprehensive income | 27,981 |  |  |  | 27,902 |  | 79
Cash dividends paid: |  |  |  |  |  |  |
Common stock | (18,907) |  |  |  |  | (18,907) |
Payment of cash dividends to noncontrolling interest | (542) |  |  |  |  |  | (542)
Ending Balance at Dec. 31, 2017 | $ 740,914 | $ 26,071 | $ 170,408 | $ (78,561) | $ (99,563) | $ 721,741 | $ 818

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