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Earnings per share (Tables) | 3 Months Ended
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Mar. 31, 2012
Earnings Per Share [Abstract] |
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] |
|  |  |  |  | Three Months Ended
|  |  |  |  | March 31,
(Amounts in thousands, except share and per share amounts) |  | 2012 |  | 2011
| Net income attributable to common |  |  |  |  |  |
|  | stockholders – basic and diluted |  | $ | 19,482 |  | $ | 18,207
| Weighted average shares outstanding – basic and diluted |  |  | 5,106,984 |  |  | 5,105,936
| Net income per common share – basic and diluted |  | $ | 3.81 |  | $ | 3.57

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- Details
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- Definition Tabular disclosure of an entity's basic and diluted earnings per share calculations. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
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