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Consolidated Statement Of Changes In Stockholders' Equity (USD $) | Total | Common Stock | Additional Paid-in Capital | Retained Earnings | Accumulated Other Comprehensive Income | Treasury Stock
--- | --- | --- | --- | --- | --- | ---
Beginning Balance at Dec. 31, 2012 | $ 2,640,657,000 | $ 1,841,000 | $ 863,558,000 | $ 2,548,542,000 | $ 21,767,000 | $ (795,051,000)
Beginning Balance (in shares) at Dec. 31, 2012 | 184,059,900 | 184,060,000 |  |  |  |
Net income | 96,998,000 |  |  | 96,998,000 |  |
Foreign currency translation adjustment | (6,051,000) |  |  |  | (6,051,000) |
Issuance of restricted stock (in shares) |  | 1,220,000 |  |  |  |
Issuance of restricted stock |  | 12,000 | (12,000) |  |  |
Vesting of stock unit awards |  | 8,000 |  |  |  |
Forfeitures of restricted stock (in shares) |  | (32,000) |  |  |  |
Forfeitures of restricted stock |  |  |  |  |  |
Exercise of stock options (in shares) | 1,190,000 | 1,190,000 |  |  |  |
Exercise of stock options | 19,286,000 | 11,000 | 19,275,000 |  |  |
Stock-based compensation | 12,119,000 |  | 12,119,000 |  |  |
Tax benefit related to stock-based compensation | 4,862,000 |  | 4,862,000 |  |  |
Payment of cash dividends | (14,673,000) |  |  | (14,673,000) |  |
Purchase of treasury stock | (22,358,000) |  |  |  |  | (22,358,000)
Ending Balance at Jun. 30, 2013 | $ 2,730,840,000 | $ 1,864,000 | $ 899,802,000 | $ 2,630,867,000 | $ 15,716,000 | $ (817,409,000)
Ending Balance (in shares) at Jun. 30, 2013 | 186,446,351 | 186,446,000 |  |  |  |

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