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Commitments and Contingencies (Narrative) (Details) |  | 9 Months Ended |
--- | --- | --- | ---
Apr. 21, 2017 USD ($) | Sep. 30, 2017 USD ($) | Sep. 30, 2016 USD ($) | Jan. 22, 2015 a
Other Commitments [Line Items] |  |  |  |
Percentage of capital committed to strategic investments that may be drawn down |  | 100.00% |  |
Net proceeds from sales of land and development assets |  | $ 174,979,000 | $ 64,159,000 |
Lennar |  |  |  |
Other Commitments [Line Items] |  |  |  |
Area of land subject to litigation (in acres) | a |  |  |  | 1,250
Lennar | Real Estate Sales |  |  |  |
Other Commitments [Line Items] |  |  |  |
Net proceeds from sales of land and development assets | $ 234,100,000 |  |  |
Payments for documentary transfer taxes | 3,300,000 |  |  |
Sales proceeds from sale of land | 114,000,000 |  |  |
Proceeds from interest received | 121,800,000 |  |  |
Proceeds from real estate tax reimbursements | 1,600,000 |  |  |
Damages sought for legal fees, in excess of | $ 17,000,000 |  |  |
Participation interests held by third party (as a percent) | 4.30% |  |  |
Lennar | Land & Development | Real Estate Sales |  |  |  |
Other Commitments [Line Items] |  |  |  |
Unpaid purchase price, interest rate (as a percent) |  |  |  | 12.00%

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- Definition The value (monetary amount) of the award the plaintiff seeks in the legal matter. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=82911808&loc=d3e14326-108349 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 9 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=82911808&loc=d3e14557-108349 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=82911808&loc=d3e14435-108349 + Details
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