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Real Estate (Impairments) (Details) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2016 USD ($) | Sep. 30, 2015 USD ($) | Sep. 30, 2016 USD ($) | Sep. 30, 2015 USD ($) property
Investment [Line Items] |  |  |  |
Impairment of assets | $ 8,741 | $ 3,916 | $ 11,753 | $ 5,590
Real Estate Properties |  |  |  |
Investment [Line Items] |  |  |  |
Impairment of assets |  |  | 7,900 |
Residential Operating Properties |  |  |  |
Investment [Line Items] |  |  |  |
Impairment of assets |  |  | 3,000 |
Number of real estate properties impaired | property |  |  |  | 1
Net Lease Assets |  |  |  |
Investment [Line Items] |  |  |  |
Impairment of assets |  |  | $ 4,900 |
Operating Properties |  |  |  |
Investment [Line Items] |  |  |  |
Number of real estate properties impaired | property |  |  |  | 2

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- Definition Line items represent reporting concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Article 12 -Section 12 -Sentence Column A + Details
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- Definition Amount of write-down of assets recognized in the income statement. Includes, but is not limited to, losses from tangible assets, intangible assets and goodwill. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 45 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=51824106&loc=d3e2420-110228 Reference 2: 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=56944662&loc=d3e3602-108585 + Details
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