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Dividends Declared Per Share (Tables) | 6 Months Ended
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Jun. 30, 2013
Schedule of Dividends Declared |
Declaration Date |  | Date Paid (Payable) |  |  | Shareholder of Record Date |  |  | Dividend Amount |
06/05/13 |  |  | 08/15/13 |  |  |  | 08/01/13 |  |  | $ | 0.345 |
03/28/13 |  |  | 05/15/13 |  |  |  | 05/01/13 |  |  | $ | 0.345 |
01/17/13 |  |  | 02/15/13 |  |  |  | 02/01/13 |  |  | $ | 0.345 |
09/19/12 |  |  | 11/15/12 |  |  |  | 11/01/12 |  |  | $ | 0.345 |
06/06/12 |  |  | 08/15/12 |  |  |  | 08/01/12 |  |  | $ | 0.345 |
03/22/12 |  |  | 05/15/12 |  |  |  | 05/01/12 |  |  | $ | 0.345 |
01/17/12 |  |  | 02/15/12 |  |  |  | 02/01/12 |  |  | $ | 0.345 |

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- Definition Tabular disclosure of information related to dividends declared, including paid and unpaid dividends. + References No definition available. + Details
Name: | us-gaap_DividendsDeclaredTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration