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Consolidated Statement of Stockholders' Equity (USD $) In Thousands, except Share data | Total | Stockholders' Equity of the Company Preferred Stock [Member] | Stockholders' Equity of the Company Common Stock [Member] | Stockholders' Equity of the Company Treasury Stock [Member] | Stockholders' Equity of the Company Additional Paid-in Capital [Member] | Stockholders' Equity of the Company Accumulated Other Comprehensive Income (Loss) [Member] | Stockholders' Equity of the Company Retained Earnings [Member] | Noncontrolling Interest [Member]
--- | --- | --- | --- | --- | --- | --- | --- | ---
Beginning balance,value at Dec. 31, 2009 | $ 455,901 | $ 0 | $ 622 | $ (251,691) | $ 344,251 | $ 10,513 | $ 346,728 | $ 5,478
Preferred stock beginning balance, share at Dec. 31, 2009 |  | 0 |  |  |  |  |  |
Common stock beginning balance, share at Dec. 31, 2009 |  |  | 62,218,000 |  |  |  |  |
Net income | 53,538 |  |  |  |  |  | 49,874 | 3,664
Acquisition of noncontrolling interest | 6,000 |  |  |  |  |  |  | 6,000
Dividends distributed to noncontrolling interest | (4,140) |  |  |  |  |  |  | (4,140)
Foreign currency translation adjustments | 8,080 |  |  |  |  | 7,990 |  | 90
Derivatives valuation, net of tax | 2,623 |  |  |  |  | 2,623 |  |
Vesting of restricted stock units, share |  |  | 420,000 |  |  |  |  |
Vesting of restricted stock units, value | (3,072) |  | 5 | 5,448 | (8,525) |  |  |
Exercise of stock options, share |  |  | 273,000 |  |  |  |  |
Exercise of stock options, value | 2,792 |  | 3 | 3,541 | (752) |  |  |
Excess tax benefit from equity-based awards | 811 |  |  |  | 811 |  |  |
Equity-based compensation expense | 13,372 |  |  |  | 13,372 |  |  |
Purchases of common stock, share |  |  | (5,036,000) |  |  |  |  |
Purchases of common stock, value | (80,295) |  | (51) | (80,244) |  |  |  |
Other | (792) |  |  |  |  | (792) |  |
Ending balance,value at Dec. 31, 2010 | 454,818 | 0 | 579 | (322,946) | 349,157 | 20,334 | 396,602 | 11,092
Preferred stock ending balance, share at Dec. 31, 2010 |  | 0 |  |  |  |  |  |
Common stock ending balance, share at Dec. 31, 2010 |  |  | 57,875,000 |  |  |  |  |
Net income | 78,275 |  |  |  |  |  | 74,174 | 4,101
Dividends distributed to noncontrolling interest | (3,548) |  |  |  |  |  |  | (3,548)
Foreign currency translation adjustments | (12,596) |  |  |  |  | (12,211) |  | (385)
Derivatives valuation, net of tax | (12,942) |  |  |  |  | (12,942) |  |
Vesting of restricted stock units, share |  |  | 561,000 |  |  |  |  |
Vesting of restricted stock units, value | (5,393) |  | 5 | 7,706 | (13,104) |  |  |
Exercise of stock options, share |  |  | 1,564,000 |  |  |  |  |
Exercise of stock options, value | 14,762 |  | 15 | 21,633 | (6,886) |  |  |
Excess tax benefit from equity-based awards | 5,363 |  |  |  | 5,363 |  |  |
Equity-based compensation expense | 15,856 |  |  |  | 15,856 |  |  |
Purchases of common stock, share |  |  | (3,365,000) |  |  |  |  |
Purchases of common stock, value | (63,693) |  | (33) | (63,660) |  |  |  |
Other | (655) |  |  |  |  | (655) |  |
Ending balance,value at Dec. 31, 2011 | 470,247 | 0 | 566 | (357,267) | 350,386 | (5,474) | 470,776 | 11,260
Preferred stock ending balance, share at Dec. 31, 2011 | 0 | 0 |  |  |  |  |  |
Common stock ending balance, share at Dec. 31, 2011 | 56,635,319 |  | 56,635,000 |  |  |  |  |
Net income | 73,923 |  |  |  |  |  | 70,015 | 3,908
Acquisition of noncontrolling interest | 941 |  |  |  |  |  |  | 941
Dividends distributed to noncontrolling interest | (2,205) |  |  |  |  |  |  | (2,205)
Foreign currency translation adjustments | 12,648 |  |  |  |  | 12,517 |  | 131
Derivatives valuation, net of tax | 15,411 |  |  |  |  | 15,411 |  |
Vesting of restricted stock units, share |  |  | 575,000 |  |  |  |  |
Vesting of restricted stock units, value | (4,580) |  | 5 | 8,041 | (12,626) |  |  |
Exercise of stock options, share | (121,109) |  | 121,000 |  |  |  |  |
Exercise of stock options, value | 1,374 |  | 1 | 1,703 | (330) |  |  |
Excess tax benefit from equity-based awards | (1) |  |  |  | (1) |  |  |
Equity-based compensation expense | 13,295 |  |  |  | 13,285 |  |  | 10
Purchases of common stock, share |  |  | (5,043,000) |  |  |  |  |
Purchases of common stock, value | (81,243) |  | (50) | (81,193) |  |  |  |
Other | 527 |  |  |  |  | 527 |  |
Ending balance,value at Dec. 31, 2012 | $ 500,337 | $ 0 | $ 522 | $ (428,716) | $ 350,714 | $ 22,981 | $ 540,791 | $ 14,045
Preferred stock ending balance, share at Dec. 31, 2012 | 0 | 0 |  |  |  |  |  |
Common stock ending balance, share at Dec. 31, 2012 | 52,288,567 |  | 52,288,000 |  |  |  |  |

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