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Leases (Tables) | 12 Months Ended
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Dec. 31, 2012
Leases [Abstract] |
Schedule of Future Minimum Rental Payments Receivable for Operating Leases [Table Text Block] | Minimum future rental receipts under the non-cancelable portion of tenant leases, assuming no new or re-negotiated leases, for the next five years and thereafter are as follows:
Year ending December 31, |  | Total
2013 |  | $ | 335,434 |
2014 |  | 319,112 |
2015 |  | 276,155 |
2016 |  | 245,100 |
2017 |  | 222,542 |
Thereafter |  | 1,111,022 |
|  | $ | 2,509,365 |
Schedule of Future Minimum Rental Payments for Operating Leases [Table Text Block] | Minimum future rental payments under non-cancelable leasehold interests, excluding leases held through industrial revenue bonds and lease payments in the future that are based upon fair market value, for the next five years and thereafter are as follows:
Year ending December 31, |  | Total
2013 |  | $ | 2,572 |
2014 |  | 2,328 |
2015 |  | 2,300 |
2016 |  | 1,971 |
2017 |  | 1,924 |
Thereafter |  | 15,885 |
|  | $ | 26,980 |

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- Definition Schedule of Future Minimum Rental Payments Receivable for Operating Leases [Table Text Block] + References No definition available. + Details
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- Definition Tabular disclosure of future minimum payments required in the aggregate and for each of the five succeeding fiscal years for operating leases having initial or remaining noncancelable lease terms in excess of one year and the total minimum rentals to be received in the future under noncancelable subleases as of the balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Topic 840 -SubTopic 20 -Publisher FASB -Number -Article -Subparagraph -Name Accounting Standards Codification -Paragraph 2 -Section 50 -URI http://asc.fasb.org/extlink&oid=6453985&loc=d3e41502-112717 + Details
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