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Real Estate (Acquisitions) (Details) (USD $) | 9 Months Ended
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Sep. 30, 2014 | Sep. 30, 2013
Real Estate Properties [Line Items] |  |  |  |
Acquisitions of real estate assets | $ 2,964,000 | [1] | $ 8,790,000 | [2]
Payments for repurchase of redeemable noncontrolling interest |  |  | 8,800,000 |
Corporate Joint Venture |  |  |  |
Real Estate Properties [Line Items] |  |  |  |
Noncontrolling interest, ownership percentage by parent |  |  | 63.00% |
Joint venture, venture ownership percentage |  |  | 37.00% |
Real Estate Acquired in Satisfaction of Debt |  |  |  |
Real Estate Properties [Line Items] |  |  |  |
Mortgage loans on real estate, foreclosures | 77,900,000 |  |  |
Real Estate Acquired in Satisfaction of Debt | Corporate Joint Venture |  |  |  |
Real Estate Properties [Line Items] |  |  |  |
Mortgage loans on real estate, foreclosures |  |  | $ 25,500,000 |
Commercial Operating Properties | Real Estate Acquired in Satisfaction of Debt |  |  |  |
Real Estate Properties [Line Items] |  |  |  |
Number of properties acquired | 3 |  |  |
[1] | During the nine months ended September 30, 2014, the Company purchased two residential units for $3.0 million.
[2] | During the nine months ended September 30, 2013, the Company paid $8.8 million to redeem a noncontrolling member's interest.

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- Definition The amount of mortgage loans on real estate which were foreclosed on during the reporting period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 10 -Section S99 -Paragraph 6 -Subparagraph (SX 210.5-04.(c) Schedule IV) -URI http://asc.fasb.org/extlink&oid=27047687&loc=d3e5864-122674 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 29 -Article 12 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Paragraph c -Subparagraph Schedule IV -Article 5 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 948 -SubTopic 310 -Section S99 -Paragraph 1 -Subparagraph (SX 210.12-29.6) -URI http://asc.fasb.org/extlink&oid=6589523&loc=d3e617274-123014 + Details
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- Definition The cash outflow from the acquisition of a piece of land, anything permanently fixed to it, including buildings, structures on it and so forth; includes real estate intended to generate income for the owner; excludes real estate 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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