Loans to and Investments In Associated Companies (HomeFed) (Narrative) (Details) - HomeFed	9 Months Ended
Sep. 30, 2018 director shares
Investments In Associated Companies [Line Items]
Shares of common stock owned \| shares	10,852,123
Equity method investment, ownership percentage	70.00%
Maximum voting rights as a percentage of total voting securities voting	45.00%
Number of directors appointed by Company \| director	3
Company Chairman
Investments In Associated Companies [Line Items]
Ownership percentage of company	5.00%

Balance held at close of period in number of shares.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 946
-SubTopic 210
-Section 50
-Paragraph 6
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-URI http://asc.fasb.org/extlink&oid=99383244&loc=d3e12121-115841

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
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Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 946
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Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef
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-URI http://asc.fasb.org/extlink&oid=50485924&loc=d3e611133-123010

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Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant