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CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (USD $) In Thousands, unless otherwise specified | Total | Preferred Stock | Common Stock | Additional Paid-In Capital | Retained Earnings | Accumulated Other Comprehensive Income (Loss) | Common Stock Held in Treasury
--- | --- | --- | --- | --- | --- | --- | ---
Balance at beginning of period (value) at Dec. 31, 2010 | $ 298,004 | $ 0 | $ 380 | $ 142,344 | $ 255,741 | $ (3,049) | $ (97,412)
Balance at beginning of period (shares) at Dec. 31, 2010 |  | 0 | 38,002 |  |  |  | 6,840
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |
Shares issued under share-based compensation (shares) |  |  | 16 |  |  |  |
Shares issued under share-based compensation (value) | 0 |  | 0 |  |  |  |
Exercise of stock options and warrants (shares) |  |  | 273 |  |  |  |
Exercise of stock options and warrants (value) | 2,478 |  | 3 | 2,475 |  |  |
Income tax benefit from exercise of stock options and warrants (value) | 2,088 |  |  | 2,088 |  |  |
Share-based compensation expense (value) | 742 |  |  | 742 |  |  |
Net income | 77,782 |  |  |  | 77,782 |  |
Currency translation adjustment, net of tax (value) | (10,414) |  |  |  |  | (10,414) |
Repurchases of treasury stock (shares) |  |  |  |  |  |  | 1,360
Repurchases of treasury stock (value) | (55,308) |  |  |  |  |  | (55,308)
Balance at end of period (value) at Dec. 31, 2011 | 315,372 | 0 | 383 | 147,649 | 333,523 | (13,463) | (152,720)
Balance at end of period (shares) at Dec. 31, 2011 |  | 0 | 38,291 |  |  |  | 8,200
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |
Shares issued under share-based compensation (shares) |  |  | 31 |  |  |  |
Shares issued under share-based compensation (value) | 0 |  | 0 |  |  |  |
Exercise of stock options and warrants (shares) |  |  | 474 |  |  |  |
Exercise of stock options and warrants (value) | 4,296 |  | 5 | 4,291 |  |  |
Income tax benefit from exercise of stock options and warrants (value) | 5,841 |  |  | 5,841 |  |  |
Share-based compensation expense (value) | 1,300 |  |  | 1,300 |  |  |
Net income | 80,359 |  |  |  | 80,359 |  |
Currency translation adjustment, net of tax (value) | 6,523 |  |  |  |  | 6,523 |
Repurchases of treasury stock (shares) |  |  |  |  |  |  | 1,500
Repurchases of treasury stock (value) | (61,275) |  |  |  |  |  | (61,275)
Balance at end of period (value) at Dec. 31, 2012 | 352,416 | 0 | 388 | 159,081 | 413,882 | (6,940) | (213,995)
Balance at end of period (shares) at Dec. 31, 2012 |  | 0 | 38,796 |  |  |  | 9,700
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |
Shares issued under share-based compensation (shares) |  |  | 8 |  |  |  |
Shares issued under share-based compensation (value) | 0 |  | 0 |  |  |  |
Exercise of stock options and warrants (shares) |  |  | 573 |  |  |  |
Exercise of stock options and warrants (value) | 9,242 |  | 6 | 9,236 |  |  |
Income tax benefit from exercise of stock options and warrants (value) | 7,805 |  |  | 7,805 |  |  |
Share-based compensation expense (value) | 553 |  |  | 553 |  |  |
Net income | 83,846 |  |  |  | 83,846 |  |
Currency translation adjustment, net of tax (value) | (811) |  |  |  |  | (811) |
Repurchases of treasury stock (shares) |  |  |  |  |  |  | 729
Repurchases of treasury stock (value) | (38,692) |  |  |  |  |  | (38,692)
Balance at end of period (value) at Dec. 31, 2013 | $ 414,359 | $ 0 | $ 394 | $ 176,675 | $ 497,728 | $ (7,751) | $ (252,687)
Balance at end of period (shares) at Dec. 31, 2013 |  | 0 | 39,377 |  |  |  | 10,429

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