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Earnings Per Share (Tables) | 12 Months Ended
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Dec. 31, 2014
Earnings Per Share [Abstract] |
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] |
|  |  | For the Year Ended December 31, |  |
(Amounts in thousands, except share and per share amounts) | 2014 |  | 2013 |  | 2012 |  |
| Income from continuing operations | $ | 67,396 |  | $ | 54,663 |  | $ | 50,041 |  |
| Income from discontinued operations, net of income attributable to |  |  |  |  |  |  |  |  |  |
|  | the noncontrolling interest |  | 529 |  |  | 2,252 |  |  | 624,346 |  |
| Net income attributable to common stockholders – basic and diluted | $ | 67,925 |  | $ | 56,915 |  | $ | 674,387 |  |
| Weighted average shares outstanding – basic and diluted |  | 5,110,628 |  |  | 5,109,055 |  |  | 5,107,610 |  |
| Income from continuing operations | $ | 13.19 |  | $ | 10.70 |  | $ | 9.80 |  |
| Income from discontinued operations, net |  | 0.10 |  |  | 0.44 |  |  | 122.24 |  |
| Net income per common share – basic and diluted | $ | 13.29 |  | $ | 11.14 |  | $ | 132.04 |  |

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- Definition Tabular disclosure of an entity's basic and diluted earnings per share calculations, including a reconciliation of numerators and denominators of the basic and diluted per-share computations for income from continuing operations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
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