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Note 2 - Real Estate (Tables) | 12 Months Ended
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Dec. 31, 2014
Real Estate [Abstract] |
Schedule of Property Subject to or Available for Operating Lease [Table Text Block] |
|  | December 31, |
|  | 201 4 |  |  | 2013 |
Land |  | $ | 2,291,338 |  |  | $ | 1,989,830 |
Undeveloped land |  |  | 74,462 |  |  |  | 82,269 |
Buildings and improvements: |  |  |  |  |  |  |  |
Buildings |  |  | 4,909,152 |  |  |  | 4,572,740 |
Building improvements |  |  | 1,349,028 |  |  |  | 1,168,959 |
Tenant improvements |  |  | 658,868 |  |  |  | 725,570 |
Fixtures and leasehold improvements |  |  | 61,122 |  |  |  | 61,015 |
Other rental property (1) |  |  | 541,925 |  |  |  | 425,143 |
|  |  | 9,885,895 |  |  |  | 9,025,526 |
Accumulated depreciation and amortization |  |  | (1,955,406 | ) |  |  | (1,878,681 | )
Total |  | $ | 7,930,489 |  |  | $ | 7,146,845 |

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- Definition Tabular disclosure of lessor's property under leasing agreements and property available for lease (not currently under lease) by property class, the gross amount, accumulated depreciation and net amount of as of the balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6454179&loc=d3e41551-112718 + Details
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