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Condensed Consolidated Statements of Stockholders' Equity (USD $) In Thousands, unless otherwise specified | Total | Common Stock | Additional Paid-in Capital | Retained Earnings | Accumulated Other Comprehensive Income (Loss) | Treasury Stock
--- | --- | --- | --- | --- | --- | ---
Balance at Dec. 31, 2010 | $ 787,793 | $ 500 | $ 165,425 | $ 607,241 | $ 14,627 |
Balance (in shares) at Dec. 31, 2010 |  | 50,096 |  |  |  |
Increase (Decrease) in Stockholders' Equity |  |  |  |  |  |
Net income | 26,571 |  |  | 26,571 |  |
Translation adjustment, net of tax of $3, ($2) and $1 for the periods ended June 30, 2012, December 31, 2011 and June 30, 2011, respectively | 10,252 |  |  |  | 10,252 |
Stock options exercised | 154 |  | 154 |  |  |
Stock options exercised (in shares) |  | 6 |  |  |  |
Stock compensation | 2,118 |  | 2,118 |  |  |
Tax effect of options exercised | (39) |  | (39) |  |  |
Repurchase of common stock | (50,075) |  |  |  |  | (50,075)
Repurchase of common stock (in shares) |  | (1,828) |  |  |  |
Retirement of common stock |  | (18) |  | (50,057) |  | 50,075
Cash dividends declared on common stock, $0.25, $0.25 and $0.25 per share for the periods ended June 30, 2012, December 31, 2011 and June 30, 2011, respectively | (12,526) |  |  | (12,526) |  |
Common stock issued at $33.71 and $30.91 per share for stock bonus for the period ended June 30, 2012 and 2011, respectively | 204 |  | 204 |  |  |
Common stock issued at $33.71 and $30.91 per share for stock bonus for the period ended June 30, 2012 and 2011, respectively (in shares) |  | 7 |  |  |  |
Balance at Jun. 30, 2011 | 764,452 | 482 | 167,862 | 571,229 | 24,879 |
Balance (in shares) at Jun. 30, 2011 |  | 48,281 |  |  |  |
Increase (Decrease) in Stockholders' Equity |  |  |  |  |  |
Net income | 24,329 |  |  | 24,329 |  |
Translation adjustment, net of tax of $3, ($2) and $1 for the periods ended June 30, 2012, December 31, 2011 and June 30, 2011, respectively | (18,096) |  |  |  | (18,096) |
Stock options exercised | 60 |  | 60 |  |  |
Stock options exercised (in shares) |  | 2 |  |  |  |
Stock compensation | 4,076 |  | 4,076 |  |  |
Tax effect of options exercised | (1,515) |  | (1,515) |  |  |
Repurchase of common stock | (3,133) |  |  |  |  | (3,133)
Repurchase of common stock (in shares) |  | (120) |  |  |  |
Retirement of common stock |  | (1) |  | (3,132) |  | 3,133
Cash dividends declared on common stock, $0.25, $0.25 and $0.25 per share for the periods ended June 30, 2012, December 31, 2011 and June 30, 2011, respectively | (11,810) |  |  | (11,810) |  |
Balance at Dec. 31, 2011 | 758,363 | 481 | 170,483 | 580,616 | 6,783 |
Balance (in shares) at Dec. 31, 2011 |  | 48,163 |  |  |  |
Increase (Decrease) in Stockholders' Equity |  |  |  |  |  |
Net income | 23,060 |  |  | 23,060 |  |
Translation adjustment, net of tax of $3, ($2) and $1 for the periods ended June 30, 2012, December 31, 2011 and June 30, 2011, respectively | (2,725) |  |  |  | (2,725) |
Stock options exercised | 1,983 | 1 | 1,982 |  |  |
Stock options exercised (in shares) |  | 82 |  |  |  |
Stock compensation | 5,005 |  | 5,005 |  |  |
Tax effect of options exercised | (56) |  | (56) |  |  |
Shares issued from release of Restricted Stock Units | (1,023) |  | (1,023) |  |  |
Shares issued from release of Restricted Stock Units (in shares) |  | 61 |  |  |  |
Cash dividends declared on common stock, $0.25, $0.25 and $0.25 per share for the periods ended June 30, 2012, December 31, 2011 and June 30, 2011, respectively | (12,081) |  |  | (12,081) |  |
Common stock issued at $33.71 and $30.91 per share for stock bonus for the period ended June 30, 2012 and 2011, respectively | 418 |  | 418 |  |  |
Common stock issued at $33.71 and $30.91 per share for stock bonus for the period ended June 30, 2012 and 2011, respectively (in shares) |  | 12 |  |  |  |
Balance at Jun. 30, 2012 | $ 772,944 | $ 482 | $ 176,809 | $ 591,595 | $ 4,058 |
Balance (in shares) at Jun. 30, 2012 |  | 48,318 |  |  |  |

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