v2.4.0.6

Net Income Per Share (Details) (USD $) In Thousands, except Share data, unless otherwise specified | 12 Months Ended
--- | ---
Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2010
Numerator for Basic and Diluted Earnings per Share - [Abstract] |  |  |
Net Income | $ 570,279 | $ 1,091,123 | $ 160,654
Denominator for Basic Earnings per Share - [Abstract] |  |  |
Weighted Average Shares | 267,577,000 | 262,735,000 | 250,876,000
Potential Dilutive Common Shares -[Abstract] |  |  |
Stock Options/SARs | 1,456,000 | 1,707,000 | 1,991,000
Restricted Stock/Units and Performance Units/Stock | 1,729,000 | 1,826,000 | 1,633,000
Denominator for Diluted Earnings per Share - [Abstract] |  |  |
Adjusted Diluted Weighted Average Shares | 270,762,000 | 266,268,000 | 254,500,000
Net Income Per Share [Abstract] |  |  |
Basic | $ 2.13 | $ 4.15 | $ 0.64
Diluted | $ 2.11 | $ 4.10 | $ 0.63
Antidilutive Stock Options and SARs excluded from Diluted Earnings Per Share Calculation | 500,000 | 400,000 | 300,000

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