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Consolidated Statements Of Stockholders' Equity (USD $) In Thousands | Common Stock [Member] | Capital Surplus [Member] | Accumulated Other Comprehensive Income [Member] | Retained Earnings [Member] | Comprehensive Income [Member] | Total
--- | --- | --- | --- | --- | --- | ---
Balance at beginning of period, value at Dec. 31, 2008 | $ 151 | $ 949,474 | $ 34,263 |  |  |
Balance at beginning of period, shares at Dec. 31, 2008 | 150,943 |  |  |  |  |
Net issuances of restricted stock, shares | 2,400 |  |  |  |  |
Net issuances of restricted stock, value | 2 | (2) |  |  |  |
Repurchases of common stock, shares | (6,398) |  |  |  |  |
Repurchases of common stock, value | (6) | (112,549) |  | (37,263) |  |
Cash dividends |  | (72,459) |  |  |  |
Stock-based compensation expense |  | 61,148 |  |  |  |
Exercises of stock options, shares | 1,700 |  |  |  |  |
Exercises of stock options, value | 2 | 24,949 |  |  |  |
Translation adjustments |  |  | 11,317 |  | 11,317 |
Tax impact of equity incentive plans |  | 3,520 |  |  |  |
Net income |  |  |  | 37,263 | 37,263 | 37,263
Total comprehensive income |  |  |  |  | 48,580 |
Balance at end of period, value at Dec. 31, 2009 | 149 | 854,081 | 45,580 |  |  |
Balance at end of period, shares at Dec. 31, 2009 | 148,645 |  |  |  |  |
Net issuances of restricted stock, shares | 1,574 |  |  |  |  |
Net issuances of restricted stock, value | 1 | (1) |  |  |  |
Repurchases of common stock, shares | (5,762) |  |  |  |  |
Repurchases of common stock, value | (6) | (103,153) |  | (52,301) |  |
Cash dividends |  | (63,147) |  | (13,768) |  |
Stock-based compensation expense |  | 57,119 |  |  |  |
Exercises of stock options, shares | 1,726 |  |  |  |  |
Exercises of stock options, value | 2 | 38,353 |  |  |  |
Translation adjustments |  |  | 1,540 |  | 1,540 |
Tax impact of equity incentive plans |  | 3,853 |  |  |  |
Net income |  |  |  | 66,069 | 66,069 | 66,069
Total comprehensive income |  |  |  |  | 67,609 |
Balance at end of period, value at Dec. 31, 2010 | 146 | 787,105 | 47,120 |  |  | 834,371
Balance at end of period, shares at Dec. 31, 2010 | 146,183 |  |  |  |  |
Net issuances of restricted stock, shares | 1,425 |  |  |  |  |
Net issuances of restricted stock, value | 1 | (1) |  |  |  |
Repurchases of common stock, shares | (6,328) |  |  |  |  |
Repurchases of common stock, value | (6) | (20,641) |  | (149,922) |  |
Cash dividends |  | (81,024) |  |  |  |
Stock-based compensation expense |  | 50,906 |  |  |  |
Exercises of stock options, shares | 806 |  |  |  |  |
Exercises of stock options, value | 1 | 18,308 |  |  |  |
Translation adjustments |  |  | (6,233) |  | (6,233) |
Tax impact of equity incentive plans |  | 4,823 |  |  |  |
Net income |  |  |  | 149,922 | 149,922 | 149,922
Total comprehensive income |  |  |  |  | 143,689 |
Balance at end of period, value at Dec. 31, 2011 | $ 142 | $ 759,476 | $ 40,887 |  |  | $ 800,505
Balance at end of period, shares at Dec. 31, 2011 | 142,086 |  |  |  |  |

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