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Consolidated Statements of Changes in Shareholders' Equity (USD $) In Thousands, except Share data | Total | Common stock | Additional paid-in capital | Retained earnings | Accumulated other comprehensive income | Treasury stock | Noncontrolling interest
--- | --- | --- | --- | --- | --- | --- | ---
Beginning Balance at Dec. 31, 2008 | $ 255,509 | $ 30 | $ 41,950 | $ 168,025 | $ 25,515 | $ (31,319) | $ 51,308
Beginning Balance (in shares) at Dec. 31, 2008 |  | 30,168,939 |  |  |  | 9,966,379 |
Net income | 30,158 |  |  | 22,367 |  |  | 7,791
Foreign currency translation adjustments | 8,767 |  |  |  | 6,789 |  | 1,978
Reclassification from OCI into earnings, net | (5,922) |  |  |  | (4,423) |  | (1,499)
Net derivative instrument gain, net of tax | 173 |  |  |  | 141 |  | 32
Dividends | (5,690) |  |  | (3,974) |  |  | (1,716)
Shares issued upon exercise of stock options and warrants including income tax benefit of $110 for 2011, $520 for 2010 and $692 for 2009, respectively (in shares) |  | 243,600 |  |  |  | (150,000) |
Shares issued upon exercise of stock options and warrants including income tax benefit of $110 for 2011, $520 for 2010 and $692 for 2009, respectively | 3,187 |  | 2,711 |  |  | 476 |
Stock compensation | 805 |  | 510 | 193 |  |  | 102
Sale of subsidiary shares to noncontrolling interest | 2,626 |  | (45) |  |  |  | 2,671
Purchased treasury shares (in shares) |  | (108,100) |  |  |  | 108,100 |
Purchased treasury shares | (631) |  |  |  |  | (631) |
Shares received as proceeds of option exercises (in shares) |  | (132,487) |  |  |  | 132,487 |
Shares received as proceeds of option exercises | (1,569) |  |  |  |  | (1,569) |
Ending Balance at Dec. 31, 2009 | 287,413 | 30 | 45,126 | 186,611 | 28,022 | (33,043) | 60,667
Ending Balance (in shares) at Dec. 31, 2009 |  | 30,171,952 |  |  |  | 10,056,966 |
Net income | 35,675 |  |  | 26,593 |  |  | 9,082
Foreign currency translation adjustments | (17,784) |  |  |  | (13,348) |  | (4,436)
Net derivative instrument gain, net of tax | 157 |  |  |  | 83 |  | 74
Dividends | (9,949) |  |  | (7,901) |  |  | (2,048)
Shares issued upon exercise of stock options and warrants including income tax benefit of $110 for 2011, $520 for 2010 and $692 for 2009, respectively (in shares) |  | 376,455 |  |  |  | (150,000) |
Shares issued upon exercise of stock options and warrants including income tax benefit of $110 for 2011, $520 for 2010 and $692 for 2009, respectively | 4,505 |  | 4,012 |  |  | 493 |
Stock compensation | 799 |  | 597 | 150 |  |  | 52
Purchase of subsidiary shares from noncontrolling interest | (4,595) |  | (2,087) |  |  |  | (2,508)
Sale of subsidiary shares to noncontrolling interest | 5,326 |  | 1,239 |  |  |  | 4,087
Shares received as proceeds of option exercises (in shares) |  | (102,526) |  |  |  | 102,526 |
Shares received as proceeds of option exercises | (1,601) |  |  |  |  | (1,601) |
Ending Balance at Dec. 31, 2010 | 299,946 | 30 | 48,887 | 205,453 | 14,757 | (34,151) | 64,970
Ending Balance (in shares) at Dec. 31, 2010 |  | 30,445,881 |  |  |  | 10,009,492 |
Net income | 42,949 |  |  | 32,303 |  |  | 10,646
Foreign currency translation adjustments | (9,680) |  |  |  | (7,021) |  | (2,659)
Net derivative instrument gain, net of tax | 18 |  |  |  | 11 |  | 7
Dividends | (12,917) |  |  | (9,768) |  |  | (3,149)
Shares issued upon exercise of stock options and warrants including income tax benefit of $110 for 2011, $520 for 2010 and $692 for 2009, respectively (in shares) |  | 95,625 |  |  |  |  |
Shares issued upon exercise of stock options and warrants including income tax benefit of $110 for 2011, $520 for 2010 and $692 for 2009, respectively | 1,093 | 1 | 1,092 |  |  |  |
Stock compensation | 935 |  | 695 | 176 |  |  | 64
Purchase of subsidiary shares from noncontrolling interest | (750) |  | (417) |  |  |  | (333)
Sale of subsidiary shares to noncontrolling interest | 2,756 |  | 626 |  |  |  | 2,130
Ending Balance at Dec. 31, 2011 | $ 324,350 | $ 31 | $ 50,883 | $ 228,164 | $ 7,747 | $ (34,151) | $ 71,676
Ending Balance (in shares) at Dec. 31, 2011 |  | 30,541,506 |  |  |  | 10,009,492 |

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