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Earnings per share (Tables) | 12 Months Ended
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Dec. 31, 2013
Earnings Per Share [Abstract] |
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] |
|  |  | For the Years Ended December 31, |  |
(Amounts in thousands, except share and per share amounts) | 2013 |  | 2012 |  | 2011 |  |
| Income from continuing operations | $ | 54,663 |  | $ | 50,041 |  | $ | 54,831 |  |
| Income from discontinued operations, net of income attributable to |  |  |  |  |  |  |  |  |  |
|  | the noncontrolling interest |  | 2,252 |  |  | 624,346 |  |  | 24,592 |  |
| Net income attributable to common stockholders – basic and diluted | $ | 56,915 |  | $ | 674,387 |  | $ | 79,423 |  |
| Weighted average shares outstanding – basic and diluted |  | 5,109,055 |  |  | 5,107,610 |  |  | 5,106,568 |  |
| Income from continuing operations | $ | 10.70 |  | $ | 9.80 |  | $ | 10.74 |  |
| Income from discontinued operations, net |  | 0.44 |  |  | 122.24 |  |  | 4.81 |  |
| Net income per common share – basic and diluted | $ | 11.14 |  | $ | 132.04 |  | $ | 15.55 |  |

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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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