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Property Acquisitions, Discontinued Operations, And Assets Held For Sale (Narrative) (Details) (USD $) | 1 Months Ended | 3 Months Ended | 6 Months Ended | 9 Months Ended | 12 Months Ended | 1 Months Ended | 9 Months Ended | 1 Months Ended
--- | --- | --- | --- | --- | --- | --- | --- | ---
Sep. 30, 2013 acre | Jun. 30, 2013 acre | Sep. 30, 2013 acre | Sep. 30, 2012 | Jun. 30, 2013 | Sep. 30, 2013 acre | Sep. 30, 2012 | Dec. 31, 2012 | Apr. 30, 2013 Camden Post Oak [Member] | Sep. 30, 2013 Camden Sotelo [Member] | Sep. 30, 2013 Camden Vantage [Member] | Sep. 30, 2013 Assets Held-for-sale [Member] | Oct. 31, 2013 Subsequent Event [Member]
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Number of operating properties acquired | 2 |  |  |  |  |  |  |  | 1 |  |  |  |
Number of apartment units in wholly owned property acquired |  |  |  |  |  |  |  |  | 356 | 170 | 592 |  |
Purchase price of operating properties acquired |  |  |  |  |  |  |  |  | $ 108,500,000 | $ 34,000,000 | $ 82,500,000 |  |
Number of operating properties held for sale |  |  |  |  |  |  |  |  |  |  |  | 5 |
Number of apartment homes in operating properties sold |  |  | 500 |  | 1,296 |  |  | 3,213 |  |  |  | 1,280 |
Number of operating properties sold |  |  | 2 |  | 2 |  |  | 11 |  |  |  |  | 0
Proceeds from Sale of Property Held-for-sale |  |  |  |  |  |  |  |  |  |  |  |  | 34,600,000
Acres of land acquired |  | 38.8 |  |  |  |  |  |  |  |  |  |  |
Payments to Acquire Land |  | 25,800,000 |  |  |  |  |  |  |  |  |  |  |
Business Combination, Pro Forma Information, Revenue of Acquiree since Acquisition Date, Actual |  |  |  |  |  | 5,400,000 |  |  |  |  |  |  |
Business Combination, Pro Forma Information, Property Expenses Since Acquisition Date, Actual |  |  |  |  |  | 2,200,000 |  |  |  |  |  |  |
Restricted cash related to the proceeds from the discpostion of two operating properties | 54,100,000 |  | 54,100,000 |  |  | 54,100,000 |  |  |  |  |  |  |
Acres of land sold | 3.7 |  | 3.7 |  |  | 3.7 |  |  |  |  |  |  |
Sales price of land parcels |  |  |  |  |  | 6,600,000 |  |  |  |  |  |  |
Gain on sale of land |  |  | $ 0 | $ 0 |  | $ 698,000 | $ 0 |  |  |  |  |  |

X
- Definition Acres of land acquired by the company during the period to be utilized in the development of multiple multifamily apartment communities. + References No definition available. + Details
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- Definition This element represents the amount of property expenses of the acquiree since the acquisition date included in the consolidated income statement for the reporting period. + References No definition available. + Details
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- Definition Number of apartment units in property disposed of or held for sale during the period. + References No definition available. + Details
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- Definition Total number of apartment units associated with the property or properties acquired during the period. + References No definition available. + Details
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- Definition Number of operating properties acquired which are now fully consolidated during the period. + References No definition available. + Details
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- Definition Number of operating properties sold during the period. + References No definition available. + Details
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- Definition Proceeds from the disposition of operating properties which was held with a qualified intermediary for use in a like-kind exchange. We included this amount in restricted cash in our consolidated balance sheets. + References No definition available. + Details
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- Definition Sales price of property or properties purchased during the period. + References No definition available. + Details
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- Definition Area of land held. + References No definition available. + Details
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- Details
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- Definition This element represents the amount of revenue of the acquiree since the acquisition date included in the consolidated income statement for the reporting period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1) -URI http://asc.fasb.org/extlink&oid=25497992&loc=d3e1392-128463 + Details
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- Definition Amount of gain (loss) on sale or disposal of property, plant and equipment assets, including oil and gas property and timber property. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585 + Details
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- Definition The number of real estate properties owned as of the balance sheet date. + References No definition available. + Details
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- Definition The cash outflow from the acquisition of real estate intended to generate income for the owner; excludes land acquired for use by the owner. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3213-108585 + Details
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- Definition The cash inflow from the sale of land held for investment; excludes sales of land held as inventory or productive use. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 12 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3179-108585 + Details
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- Definition The cash inflow from the sale of formerly productive land held for sale, anything permanently fixed to it, including buildings, structures on it, and so forth. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 12 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3179-108585 + Details
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