v2.4.0.6

Net Income Per Share (Tables) | 12 Months Ended
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Dec. 31, 2012
Net Income Per Share [Abstract] |
Computation of Net Income Per Share | The following table sets forth the computation of Net Income Per Share for the years ended December 31, 2012, 2011 and 2010 (in thousands, except per share data):
|  | 2012 |  | 2011 |  | 2010
Numerator for Basic and Diluted Earnings per Share - |  |  |  |  |  |
| Net Income | $ | 570,279 | $ | 1,091,123 | $ | 160,654
Denominator for Basic Earnings per Share - |  |  |  |  |  |
| Weighted Average Shares |  | 267,577 |  | 262,735 |  | 250,876
Potential Dilutive Common Shares - |  |  |  |  |  |
| Stock Options/SARs |  | 1,456 |  | 1,707 |  | 1,991
| Restricted Stock/Units and Performance Units/Stock |  | 1,729 |  | 1,826 |  | 1,633
Denominator for Diluted Earnings per Share - |  |  |  |  |  |
| Adjusted Diluted Weighted Average Shares |  | 270,762 |  | 266,268 |  | 254,500
Net Income Per Share |  |  |  |  |  |
| Basic | $ | 2.13 | $ | 4.15 | $ | 0.64
| Diluted | $ | 2.11 | $ | 4.10 | $ | 0.63

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- Definition Tabular disclosure of the reconciliation of basic net earnings per share (or unit) to diluted earnings per share (or unit). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
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