Investments in Unconsolidated Real Estate Joint Ventures (Narrative) (Details) (USD $)	6 Months Ended			1 Months Ended			1 Months Ended				1 Months Ended	6 Months Ended		1 Months Ended			6 Months Ended	1 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Dec. 31, 2013	Mar. 31, 2013 Altis at Kendall Square, LLC [Member] item	Jun. 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	Jun. 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	Jun. 30, 2014 Sunrise and Bayview Partners, LLC [Member] sqft	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] sqft property	Jun. 30, 2014 PGA Design Center Holdings, LLC [Member]	Jul. 31, 2014 Bonterra – CC Devco Homes [Member] Subsequent Event [Member] property acre	Apr. 30, 2014 Sale Of Land To Village At Victoria Park [Member]
Schedule of Equity Method Investments [Line Items]
Investments in unconsolidated real estate joint ventures	$ 7,437,000		$ 1,354,000	$ 1,300,000	$ 1,298,000	$ 1,300,000		$ 54,000	$ 2,368,000		$ 1,800,000	$ 1,800,000					$ 1,971,000
Number Of Apartments Units				321
Percent of proceeds from joint venture entitlement				13.00%
Internal rate of return, threshold				15.00%
Percent of proceeds from joint venture after internal rate of return, threshold				9.75%
Managers percent of proceeds from joint venture entitlement				83.00%
Area of Real Estate Property								2		2	84,000	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%	50.00%						45.00%	50.00%
Individual Contribution To Joint Venture							692,000
Investment in joint venture											1,800,000			8,000,000				15,600,000
Percent guaranteed on the outstanding blaance of the loan											50.00%	50.00%
Cash							1,800,000											2,200,000
Sales price																			(3,600,000)
Notes receivable subject to future subordination																			1,600,000
Membership interest in the form of development and property management fees												50.00%
Selling expense																			169,000
Investment in company, promissory note													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	342,000	21,000														6,100,000
Sale of commercial property to the joint venture															2,900,000
Percent of commercial property sold into joint venture															40.00%
Property contributed to the joint venture excluded certain residential development entitlements															$ 1,200,000