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Earnings Per Share (Details) (USD $)
In Thousands, except Share data, unless otherwise specified |
3 Months Ended | 12 Months Ended | |||||||||
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Dec. 31, 2011
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Sep. 30, 2011
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Jun. 30, 2011
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Mar. 31, 2011
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Dec. 31, 2010
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Sep. 30, 2010
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Jun. 30, 2010
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Mar. 31, 2010
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Dec. 31, 2011
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Dec. 31, 2010
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Dec. 31, 2009
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| Basic earnings per common share: | |||||||||||
| Net income | $ 126,858 | $ 143,391 | $ 145,918 | $ 126,446 | $ 122,900 | $ 100,946 | $ 48,764 | $ 39,737 | $ 542,613 | $ 312,347 | $ (3,094,179) |
| Preferred stock dividends, deemed dividend and accretion of discount | (7,703) | (7,703) | (7,704) | (7,703) | (83,754) | (29,495) | (29,426) | (29,357) | (30,813) | (172,032) | (174,756) |
| Net income applicable to common shareholders | 119,155 | 135,688 | 138,214 | 118,743 | 39,146 | 71,451 | 19,338 | 10,380 | 511,800 | 140,315 | (3,268,935) |
| Average common shares issued and outstanding | 863,691,000 | 726,934,000 | 532,802,000 | ||||||||
| Basic earnings per common share | $ 0.14 | $ 0.16 | $ 0.16 | $ 0.14 | $ 0.05 | $ 0.10 | $ 0.03 | $ 0.01 | $ 0.59 | $ 0.19 | $ (6.14) |
| Diluted earnings per common share | |||||||||||
| Net income applicable to common shareholders | 119,155 | 135,688 | 138,214 | 118,743 | 39,146 | 71,451 | 19,338 | 10,380 | 511,800 | 140,315 | (3,268,935) |
| Effect of assumed preferred stock conversion | 7,703 | 7,703 | 7,704 | 7,703 | 83,754 | 29,495 | 29,426 | 29,357 | 30,813 | 172,032 | 174,756 |
| Net income applicable to diluted earnings per share | $ 511,800 | $ 140,315 | $ (3,268,935) | ||||||||
| Average common shares issued and outstanding | 863,691,000 | 726,934,000 | 532,802,000 | ||||||||
| Dilutive potential common shares: | |||||||||||
| Stock options and restricted stock units | 2,916,000 | 1,722,000 | 0 | ||||||||
| Shares held in deferred compensation plans | 1,017,000 | 876,000 | 0 | ||||||||
| Incremental Common Shares Attributable to Conversion of Preferred Stock | 0 | 0 | 0 | ||||||||
| Dilutive potential common shares: | 3,933,000 | 2,598,000 | 0 | ||||||||
| Total diluted average common shares issued and outstanding | 867,624,000 | 729,532,000 | 532,802,000 | ||||||||
| Diluted earnings (loss) per common share | $ 0.14 | $ 0.16 | $ 0.16 | $ 0.14 | $ 0.05 | $ 0.10 | $ 0.03 | $ 0.01 | $ 0.59 | $ 0.19 | $ (6.14) |
| Earnings Loss Per Share (Textuals) [Abstract] | |||||||||||
| Options outstanding to purchase common stock shares having antidilutive effect | 23,600,000 | 18,500,000 | 23,700,000 | ||||||||
| Weighted average exercise price options | $ 12.52 | $ 18.05 | $ 19.71 | ||||||||
| X | ||||||||||
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- Details
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| X | ||||||||||
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- Definition
Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic net Income or Loss per outstanding limited partnership unit in the future and that were not included in the computation of diluted net income per limited partnership unit, because to do so would increase net income per unit amounts or decrease loss per unit amounts for the period presented. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Equity impact of aggregate cash, stock, and paid-in-kind dividends declared for preferred shareholders during the period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Details
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| X | ||||||||||
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- Definition
The amount of net income (loss) for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Details
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| X | ||||||||||
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- Definition
Additional shares included in the calculation of diluted EPS as a result of the potentially dilutive effect of contingently issuable shares. Contingently issuable shares are those shares that are issuable for little or no cash contingent on certain conditions being met. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Additional shares included in the calculation of diluted EPS as a result of the potentially dilutive effect of convertible preferred stock using the if-converted method. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Additional shares included in the calculation of diluted EPS as a result of the potentially dilutive effect of share based payment arrangements using the treasury stock method. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
The portion of profit or loss for the period, net of income taxes, which is attributable to the parent. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Net income after adjustments for dividends on preferred stock (declared in the period) and/or cumulative preferred stock (accumulated for the period). Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Net Income or Loss Available to Common Stockholders plus adjustments resulting from the assumption that dilutive convertible securities were converted, options or warrants were exercised, or that other shares were issued upon the satisfaction of certain conditions. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
The sum of dilutive potential common shares or units used in the calculation of the diluted per-share or per-unit computation. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Details
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- Definition
The average number of shares or units issued and outstanding that are used in calculating diluted EPS or earnings per unit (EPU), determined based on the timing of issuance of shares or units in the period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Number of [basic] shares or units, after adjustment for contingently issuable shares or units and other shares or units not deemed outstanding, determined by relating the portion of time within a reporting period that common shares or units have been outstanding to the total time in that period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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