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Consolidated Statement Of Changes In Stockholders' Equity (USD $) In Thousands, except Share data | Total | Common Stock | Additional Paid-in Capital | Retained Earnings | Accumulated Other Comprehensive Income | Treasury Stock
--- | --- | --- | --- | --- | --- | ---
Beginning Balance at Dec. 31, 2011 | $ 2,516,631 | $ 1,833 | $ 840,731 | $ 2,279,367 | $ 19,459 | $ (624,759)
Beginning Balance (in shares) at Dec. 31, 2011 | 183,295,350 | 183,295,000 |  |  |  |
Net income | 240,618 |  |  | 240,618 |  |
Foreign currency translation adjustment | 3,804 |  |  |  | 3,804 |
Issuance of restricted stock (in shares) |  | 792,000 |  |  |  |
Issuance of restricted stock |  | 8 | (8) |  |  |
Vesting of stock unit awards |  | 8,000 |  |  |  |
Forfeitures of restricted stock (in shares) |  | (90,000) |  |  |  |
Forfeitures of restricted stock |  | (1) | 1 |  |  |
Forfeitures of stock unit awards (in shares) |  | (1,000) |  |  |  |
Forfeitures of stock unit awards |  |  |  |  |  |
Exercise of stock options (in shares) | 17,800 | 18,000 |  |  |  |
Exercise of stock options | 260 |  | 260 |  |  |
Stock-based compensation | 17,203 |  | 17,203 |  |  |
Tax expense related to stock-based compensation | (1,206) |  | (1,206) |  |  |
Payment of cash dividends | (22,956) |  |  | (22,956) |  |
Purchase of treasury stock | (110,186) |  |  |  |  | (110,186)
Ending Balance at Sep. 30, 2012 | $ 2,644,168 | $ 1,840 | $ 856,981 | $ 2,497,029 | $ 23,263 | $ (734,945)
Ending Balance (in shares) at Sep. 30, 2012 | 184,021,577 | 184,022,000 |  |  |  |

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