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Investments In Joint Ventures (Narrative) (Details) | 12 Months Ended |
--- | --- | ---
Dec. 31, 2017 USD ($) | Dec. 31, 2016 USD ($) | Dec. 31, 2015 USD ($) | Jun. 01, 2017
Direct Costs of Leased and Rented Property or Equipment |  | $ 217,817,000 |  | $ 206,780,000 | $ 202,105,000 |
Income (Loss) from Equity Method Investments, Net of Dividends or Distributions | [1] | $ 6,822,000 | [2] | $ 7,125,000 | $ 6,168,000 |
Number of joint ventures accounted for under equity method investments |  | 3 |  | 3 | 3 |
Maximum guaranteed amount of loans utilized for construction and development activities for joint ventures |  | $ 0 |  |  |  |
Fees earned for property and asset management, construction, development, and other services to joint ventures |  | 5,800,000 |  | $ 5,300,000 | $ 5,800,000 |
Maximum Investments by Formed Unconsolidated Joint Venture |  | $ 450,000,000 |  |  |  |
Number of Units in Real Estate Property |  |  |  |  |  | 250
Minimum [Member] |  |  |  |  |  |
Equity method investment ownership percentage |  | 20.00% |  |  |  |
Maximum [Member] |  |  |  |  |  |
Equity method investment ownership percentage |  | 31.30% |  |  |  |
Hurricane [Member] |  |  |  |  |  |
Income (Loss) from Equity Method Investments, Net of Dividends or Distributions |  | $ 400,000 |  |  |  |
Non-consolidated entity [Member] | Hurricane [Member] |  |  |  |  |  |
Direct Costs of Leased and Rented Property or Equipment |  | $ 1,300,000 |  |  |  |
[1] | Equity in income excludes our ownership interest of fee income from various services provided by us to the Funds
[2] | Equity in income for the year ended December 31, 2017 includes our ownership interest of the hurricane related expenses of approximately $0.4 million.

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- Definition Revenue earned by providing property management, construction, development, and other services to joint ventures. + References No definition available. + Details
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- Definition Maximum investment by formed unconsolidated joint venture including leverage of approximately 70% of the estimated value of the underlying real estate + References No definition available. + Details
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- Definition Number of joint ventures accounted for under equity method investments. + References No definition available. + Details
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- Definition Amount of expense incurred and directly related to generating revenue from leased and rented property or equipment. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.2(c)) -URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688 + Details
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- Definition The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 323 -SubTopic 10 -Section 50 -Paragraph 3 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=66011266&loc=d3e33918-111571 + Details
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- Definition Maximum potential amount of future payments (undiscounted) the guarantor could be required to make under the guarantee or each group of similar guarantees before reduction for potential recoveries under recourse or collateralization provisions. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 460 -SubTopic 10 -Section 50 -Paragraph 4 -Subparagraph (b)(1) -URI http://asc.fasb.org/extlink&oid=82913245&loc=d3e12069-110248 + Details
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- Definition This element represents the undistributed income (or loss) of equity method investments, net of dividends or other distributions received from unconsolidated subsidiaries, certain corporate joint ventures, and certain noncontrolled corporations; such investments are accounted for under the equity method of accounting. This element excludes distributions that constitute a return of investment, which are classified as investing activities. + 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=98514028&loc=d3e3602-108585 + Details
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- Definition The number of units in a real estate property owned as of the balance sheet date. + References No definition available. + Details
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