Equity Investments in Unconsolidated Real Estate Joint Ventures (Equity Investments In Unconsolidated Real Estate Joint Ventures) (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013	Mar. 31, 2013
Schedule of Equity Method Investments [Line Items]
Total equity investments in unconsolidated real estate joint ventures	$ 3,346	$ 1,354
Altis at Kendall Square, LLC [Member]
Schedule of Equity Method Investments [Line Items]
Total equity investments in unconsolidated real estate joint ventures	1,300	1,300	1,300
New Urban/BBX Development, LLC [Member]
Schedule of Equity Method Investments [Line Items]
Total equity investments in unconsolidated real estate joint ventures	69	54
PGA Design Center Holdings, LLC [Member]
Schedule of Equity Method Investments [Line Items]
Total equity investments in unconsolidated real estate joint ventures	$ 1,977