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Deferred Costs Deferred Costs (Tables) | 3 Months Ended
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Mar. 31, 2013
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract] |
Components Of Deferred Costs Net [Table Text Block] | As of March 31, 2013 and December 31, 2012, the Company’s deferred costs were comprised of the following (in thousands):
| March 31, 2013
| Total Cost |  | Accumulated Amortization |  | Deferred Costs, net
Leasing Costs | $ | 147,528 |  |  | $ | (57,203 | ) |  | $ | 90,325 |
Financing Costs | 40,205 |  |  | (11,152 | ) |  | 29,053 |
Total | $ | 187,733 |  |  | $ | (68,355 | ) |  | $ | 119,378 |
| December 31, 2012
| Total Cost |  | Accumulated Amortization |  | Deferred Costs, net
Leasing Costs | $ | 150,331 |  |  | $ | (58,343 | ) |  | $ | 91,988 |
Financing Costs | 40,246 |  |  | (9,991 | ) |  | 30,255 |
Total | $ | 190,577 |  |  | $ | (68,334 | ) |  | $ | 122,243 |

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