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Earnings Per Share | 12 Months Ended
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Dec. 31, 2011
Earnings Per Share [Abstract] |
Earnings Per Share | 16. Earnings Per Share A reconciliation of the numerators and denominators of the basic and diluted earnings per share calculation for income from operations is presented below:
|  | 2011 |  |  | 2010 |  |  | 2009 |
|  | Income (Numerator) |  |  | Weighted Shares (Denominator) |  |  | Per-Share Amount |  |  | Income (Numerator) |  |  | Weighted Shares (Denominator) |  |  | Per-Share Amount |  |  | Income (Numerator) |  |  | Weighted Shares (Denominator) |  |  | Per-Share Amount |
|  | (Amounts in thousands, except per share data) |
Basic EPS |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Income available to common stockholders |  | $ | 191,164 |  |  |  | 54,825 |  |  | $ | 3.49 |  |  | $ | 152,198 |  |  |  | 54,792 |  |  | $ | 2.78 |  |  | $ | 403,072 |  |  |  | 54,770 |  |  | $ | 7.36 |
Effect of dilutive securities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Options |  |  | 0 |  |  |  | 20 |  |  |  |  |  |  |  | 0 |  |  |  | 34 |  |  |  |  |  |  |  | 0 |  |  |  | 322 |  |  |  |  |
Diluted EPS |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Income available to common stockholders after assumed conversions |  | $ | 191,164 |  |  |  | 54,845 |  |  | $ | 3.49 |  |  | $ | 152,198 |  |  |  | 54,826 |  |  | $ | 2.78 |  |  | $ | 403,072 |  |  |  | 55,092 |  |  | $ | 7.32 |
Incremental shares of 504,000, 448,000, and 685,000 for 2011, 2010, and 2009, respectively, were excluded from the computation of the diluted earnings per common shares due to their anti-dilutive effect. Potentially dilutive securities representing approximately 103,000, 93,000, and 74,000 shares of common stock for 2011, 2010, and 2009, respectively, were also excluded from the computation of diluted earnings per common share because their effect would have been anti-dilutive.

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- Definition The entire disclosure for earnings per share. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6920599&loc=d3e1252-109256 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 55 -Paragraph 52 -URI http://asc.fasb.org/extlink&oid=6945512&loc=d3e4984-109258 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 128 -Paragraph 40 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 45 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6920599&loc=d3e1278-109256 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.21) -URI http://asc.fasb.org/extlink&oid=6880815&loc=d3e20235-122688 + Details
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