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Investment in Unconsolidated Ventures Investment in Unconsolidated Ventures (Tables) | 6 Months Ended
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Jun. 30, 2013
Equity Method Investments and Joint Ventures [Abstract] |
Equity Method Investment Summarized Financial Information [Table Text Block] | The following is a summary of the financial position of the Real Estate Ventures as of June 30, 2013 and December 31, 2012 (in thousands):
| June 30, 2013 |  | December 31, 2012
Net property | $ | 813,056 |  |  | $ | 923,536 |
Other assets | 165,854 |  |  | 174,677 |
Other liabilities | 27,054 |  |  | 53,645 |
Debt | 709,975 |  |  | 724,780 |
Equity | 241,881 |  |  | 319,788 |
Company’s share of equity (Company’s basis) (a) | 176,875 |  |  | 193,555 |
Summary of results of operations of unconsolidated Real Estate Venture [Table Text Block] | The following is a summary of results of operations of the Real Estate Ventures for the three and six-month periods ended June 30, 2013 and 2012 (in thousands):
| Three-month periods ended June 30, |  | Six-month periods ended June 30,
| 2013 |  | 2012 |  | 2013 |  | 2012
Revenue | $ | 36,927 |  |  | $ | 39,064 |  |  | $ | 77,816 |  |  | $ | 77,872 |
Operating expenses | 17,205 |  |  | 16,349 |  |  | 35,472 |  |  | 33,066 |
Interest expense, net | 9,173 |  |  | 9,975 |  |  | 18,944 |  |  | 20,867 |
Depreciation and amortization | 10,979 |  |  | 11,649 |  |  | 23,885 |  |  | 23,120 |
Net income (loss) | (430 | ) |  | 1,091 |  |  | (485 | ) |  | 819 |
Company’s share of income (Company’s basis) | 1,508 |  |  | 838 |  |  | 3,043 |  |  | 882 |

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