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Discontinued Operations (Tables) | 6 Months Ended
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Jun. 30, 2012
Discontinued Operations and Disposal Groups [Abstract] |
Revenue and expenses information for the property classified as discontinued operations |
| Three-month period ended June 30, 2012 |  | Six-month period ended June 30, 2012
Revenue: |  |  |
Rents | $ | 2,003 |  |  | $ | 6,113 |
Tenant reimbursements | 343 |  |  | 758 |
Termination fees | — |  |  | 7 |
Other | 86 |  |  | 89 |
Total revenue | 2,432 |  |  | 6,967 |
Expenses: |  |  |
Property operating expenses | 594 |  |  | 1,701 |
Real estate taxes | 217 |  |  | 726 |
Depreciation and amortization | 840 |  |  | 2,744 |
Total operating expenses | 1,651 |  |  | 5,171 |
Other income (expense): |  |  |
Interest income | 2 |  |  | 2 |
Income from discontinued operations before gain on sale of interests in real estate | 783 |  |  | 1,798 |
Net gain on disposition of discontinued operations | 10,166 |  |  | 24,834 |
Income from discontinued operations | $ | 10,949 |  |  | $ | 26,632 |
| Three-month period ended June 30, 2011 |  | Six-month period ended June 30, 2011
Revenue: |  |  |  |
Rents | $ | 5,620 |  |  | $ | 11,292 |
Tenant reimbursements | 750 |  |  | 1,931 |
Other | 5 |  |  | 2 |
Total revenue | 6,375 |  |  | 13,225 |
Expenses: |  |  |
Property operating expenses | 1,581 |  |  | 3,639 |
Real estate taxes | 707 |  |  | 1,446 |
Depreciation and amortization | 2,344 |  |  | 4,561 |
Total operating expenses | 4,632 |  |  | 9,646 |
Income from discontinued operations before gain on sale of interests in real estate | 1,743 |  |  | 3,579 |
Net gain on disposition of discontinued operations | 3,836 |  |  | 3,836 |
Income from discontinued operations | $ | 5,579 |  |  | $ | 7,415 |
Disclosure of Long Lived Assets Held-for-sale [Table Text Block] |
|  | June 30,
|  | 2012
Real Estate Investments: |  |
Operating properties |  | $ | 52,990 |
Accumulated depreciation |  | (14,385 | )
|  | 38,605 |
Construction-in-progress |  | 36 |
|  | 38,641 |
Receivables |  | 1,374 |
Deferred costs, net |  | 1,137 |
Other assets |  | 298 |
Total assets held for sale |  | $ | 41,450 |
Liabilities held for sale |  | $ | 878 |

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- Definition Tabular disclosure of long lived assets held for sale. Disclosure may include the description of the facts and circumstances leading to the expected disposal, manner and timing of disposal, the carrying value of the assets held for sale, the gain (loss) recognized in the income statement and the income statement caption that includes that gain (loss). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 144 -Paragraph 33, 47 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6391110&loc=d3e2941-110230 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6360339&loc=d3e1361-107760 + Details
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