Investments in Unconsolidated Real Estate Joint Ventures (Narrative) (Details) (USD $)	1 Months Ended	9 Months Ended			1 Months Ended			1 Months Ended				1 Months Ended	9 Months Ended		1 Months Ended			9 Months Ended	1 Months Ended
	Sep. 30, 2014	Sep. 30, 2014	Sep. 30, 2013	Dec. 31, 2013	Mar. 31, 2013 Altis at Kendall Square, LLC [Member] item	Sep. 30, 2014 Altis at Kendall Square, LLC [Member]	Dec. 31, 2013 Altis at Kendall Square, LLC [Member]	Apr. 30, 2014 New Urban/BBX Development, LLC [Member]	Dec. 31, 2013 New Urban/BBX Development, LLC [Member] item acre	Sep. 30, 2014 New Urban/BBX Development, LLC [Member]	Apr. 30, 2013 New Urban/BBX Development, LLC [Member] acre	Jun. 30, 2014 Sunrise and Bayview Partners, LLC [Member] sqft	Sep. 30, 2014 Sunrise and Bayview Partners, LLC [Member]	Jul. 31, 2014 Sunrise and Bayview Partners, LLC [Member] Subsequent Event [Member]	Jul. 31, 2014 Sunrise and Bayview Partners, LLC [Member] Fort Lauderdale, Florida [Member] Subsequent Event [Member] acre	Jan. 31, 2014 PGA Design Center Holdings, LLC [Member]	Dec. 31, 2013 PGA Design Center Holdings, LLC [Member] property sqft	Sep. 30, 2014 PGA Design Center Holdings, LLC [Member]	Sep. 30, 2014 Hialeah Communities, LLC [Member]	Jul. 31, 2014 Hialeah Communities, LLC [Member] property acre	Sep. 30, 2014 Bonterra – CC Devco Homes [Member]	Jul. 31, 2014 Bonterra – CC Devco Homes [Member]
Schedule of Equity Method Investments [Line Items]
Investments in unconsolidated real estate joint ventures	$ 9,707,000	$ 9,707,000		$ 1,354,000	$ 1,300,000	$ 1,164,000	$ 1,300,000		$ 54,000	$ (11,000)			$ 1,745,000					$ 1,949,000	$ 4,860,000
Number Of Apartments Units					321
Percent of proceeds from joint venture entitlement					13.00%															57.00%		55.00%
Internal rate of return, threshold					15.00%
Percent of proceeds from joint venture after internal rate of return, threshold					9.75%																	9.00%
Managers percent of proceeds from joint venture entitlement					83.00%
Shares distributions, percent																				45.00%		55.00%
Area of Real Estate Property									2		2	84,000			3					50
Number of single family homes									30											394
Preferred membership interest																		60.00%
Equity interest in real estate joint venture									50.00%	50.00%		50.00%
Individual Contribution To Joint Venture								692,000												4,900,000
Investment in joint venture												1,800,000			8,000,000					15,600,000
Percent guaranteed on the outstanding balance of the loan												50.00%
Cash								1,800,000												2,200,000
Sales price								3,600,000
Membership interest in the form of development and property management fees													50.00%									43.00%
Selling expense								200,000
Investment in company, promissory note								1,600,000						5,000,000						8,300,000
Percent of initial contribution of capital to joint venture																						57.00%
Number of buildings																	3
Building Area																	145,000
Purchase of property	900,000	525,000	76,000														6,100,000
Sale of commercial property to the joint venture																2,900,000
Percent of commercial property sold into joint venture																40.00%
Gain on sale of land								188,000												229,000
Additional joint venture contributions																			1,800,000		1,400,000
Joint venture advances	2,300,000											5,000,000
Property contributed to the joint venture excluded certain residential development entitlements																$ 1,200,000