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Real Estate - Held for Sale (Details) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
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Dec. 31, 2012 properties | Dec. 31, 2011 properties | Dec. 31, 2010 properties
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |
Number Of Properties Classified As Held For Sale | 23 | 22 |
Number Of Improved Properties Held for Sale | 16 | 16 |
Number of Land Parcels Held for Sale | 7 | 6 |
Land and improvements | $ 15,751 | $ 14,172 |
Building and improvements | 37,080 | 32,044 |
Real Estate Held-for-sale | 52,831 | 46,216 |
Less impairment | (10,518) | (8,774) |
Inventory, Real Estate, Held-for-sale | 41,773 | 36,936 |
Number Of Disposed Properties Continuing Operations | 0 | 0 | 2
Number Of Disposed Properties Discontinued Operations | 34 | 8 | 16
Number of Disposed Properties Noncontrolling Interests | 0 | 0 | 0
Number Of Disposed Properties Continuing and Discontinued Operations | 34 | 8 | 18
Gain on disposition of real estate | 0 | 297 | 641
Gain (Loss) on Disposition of Assets, Noncontrolling Interest Portion, Discontinued Operations | 0 | (194) | (363)
Gain (Loss) on Disposition of Assets, Total, Continuing and Discontinued Operations | 10,956 | 527 | 1,712
Assets Held-for-sale [Member] |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |
Less accumulated depreciation and amortization | (540) | (506) |
Gain on disposition of real estate | $ 10,956 | $ 424 | $ 1,434

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- Definition Gain (Loss) on Disposition of Assets, Noncontrolling Interest Portion, Discontinued Operations + References No definition available. + Details
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- Definition Gain (Loss) on Disposition of Assets, Total, Continuing and Discontinued Operations + References No definition available. + Details
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- Definition Inventory, Building, Held-for-sale + References No definition available. + Details
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- Definition Number Of Disposed Properties Continuing and Discontinued Operations + References No definition available. + Details
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- Definition Number Of Improved Properties Held for Sale + References No definition available. + Details
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- Definition Number of Land Parcels Held for Sale + References No definition available. + Details
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- Definition Number Of Properties Classified As Held For Sale + References No definition available. + Details
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- Definition The gains (losses) included in earnings resulting from the sale or disposal of tangible assets. This item does not include any gain (loss) recognized on the sale of oil and gas property or 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 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 144 -Paragraph 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. + 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 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Research Bulletin (ARB) -Number 43 -Section A -Paragraph 9 -Chapter 3 -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. + Details
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- Definition Represents properties which were acquired directly or through foreclosure for which a committed plan to sell exists and an active program to market such properties has been initiated. + References No definition available. + 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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- Definition The cumulative amount of depreciation for real estate property held for investment purposes. + 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(3)) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 1 -Article 7 + Details
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