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Shareholders' Equity Common stock dividends declared (Tables) (Capital Gain [Member]) | 12 Months Ended
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Dec. 31, 2013
Capital Gain [Member] |
Tax characterization of dividends declared [Line Items] |
Common dividends declared [Table Text Block] | The following table summarizes dividends declared per share of common stock for years ending December 31, 2013, 2012, and 2011 and their related tax characterization:
|  |  | Tax Characterization
| Dividends Declared per Common Share |  | Ordinary |  | Capital Gain |  | Return of Capital
Year ended December 31, 2013 | $ | 1.1200 |  |  | $ | 1.0650 |  |  | $ | 0.0550 |  |  | $ | — |
Year ended December 31, 2012 | 1.1500 |  |  | 1.0038 |  |  | 0.1462 |  |  | — |
Year ended December 31, 2011 | 1.0900 |  |  | 0.9822 |  |  | 0.1078 |  |  | — |

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- Definition Common dividends declared, including tax characterization information for the shareholder such as ordinary income, capital gain, and return of capital [Table Text Block] + References No definition available. + Details
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- Details
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