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Real Estate - Held For Sale (Details) (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 6 Months Ended |  |
--- | --- | --- | --- | ---
Jun. 30, 2013 properties | Jun. 30, 2012 properties | Jun. 30, 2013 properties | Jun. 30, 2012 properties | Mar. 31, 2013 properties | Dec. 31, 2012 properties
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |  |  |  |
Number Of Properties Classified As Held For Sale | 29 |  |  |  | 29 |  |  |  | 15 | 10
Land and improvements | $ 19,438 |  |  |  | $ 19,438 |  |  |  |  | $ 9,937
Building and improvements | 35,437 |  |  |  | 35,437 |  |  |  |  | 17,566
Work in process | 1,193 |  |  |  | 1,193 |  |  |  |  | 72
Real Estate Held-for-sale | 56,068 |  |  |  | 56,068 |  |  |  |  | 27,575
Less accumulated depreciation and amortization | (2,410) |  |  |  | (2,410) |  |  |  |  | (2,347)
Less impairment | (6,967) |  |  |  | (6,967) |  |  |  |  | (4,920)
Inventory, Real Estate, Held-for-sale | 46,691 |  |  |  | 46,691 |  |  |  |  | 20,308
Number of Sold Properties | 7 | [1] | 7 | [1] | 9 | [1] | 10 | [1] |  |
Gain (loss) on disposition of assets noncontrolling interest portion discontinued operations | 153 |  | 0 |  | 153 |  | 0 |  |  |
Gain on disposition of real estate | 2,669 |  | 2,438 |  | 3,174 |  | 2,752 |  |  |
Assets Held-for-sale [Member] |  |  |  |  |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |  |  |  |
Gain on disposition of real estate | $ 2,516 | [1] | $ 2,438 | [1] | $ 3,021 | [1] | $ 2,752 | [1] |  |
[1] | None of the gains from property sales for the period were reported in continuing operations.

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- Definition Amount of gain (loss) on sale or disposal of property, plant and equipment assets, excluding oil and gas property and timber property. + References Reference 1: 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 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6360339&loc=d3e1361-107760 + Details
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- Definition Carrying amount as of the balance sheet date of parcels of land held for sale, and on which the entity has no intention or no further intention to perform construction activities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.6(a)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 6 -Subparagraph a -Article 5 + Details
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- Definition Carrying amount as of the balance sheet date of investments in land and buildings held for sale, excluding real estate considered to be inventory of the entity. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03.1(f)) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 + Details
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