Investments In And Advances To Unconsolidated Real Estate Joint Ventures (Investments In Unconsolidated Real Estate Joint Ventures) (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019	Jun. 30, 2019
Schedule of Equity Method Investments [Line Items]
Investments in and advances to unconsolidated real estate joint ventures	$ 63,775	$ 57,330	$ 65,254
Altis at Grand Central Capital, LLC [Member]
Schedule of Equity Method Investments [Line Items]
Investments in and advances to unconsolidated real estate joint ventures	2,547	2,653
Altis Promenade Capital, LLC [Member]
Schedule of Equity Method Investments [Line Items]
Investments in and advances to unconsolidated real estate joint ventures	2,012	2,126
Altis at Bonterra - Hialeah, LLC [Member]
Schedule of Equity Method Investments [Line Items]
Investments in and advances to unconsolidated real estate joint ventures	598	618
Altis Ludlam - Miami Investor, LLC [Member]
Schedule of Equity Method Investments [Line Items]
Investments in and advances to unconsolidated real estate joint ventures	9,051	1,081
Altis Suncoast Manager, LLC [Member]
Schedule of Equity Method Investments [Line Items]
Investments in and advances to unconsolidated real estate joint ventures	765	753
Altis Pembroke Gardens, LLC [Member]
Schedule of Equity Method Investments [Line Items]
Investments in and advances to unconsolidated real estate joint ventures	312	1,277
Altis Fairways, LLC [Member]
Schedule of Equity Method Investments [Line Items]
Investments in and advances to unconsolidated real estate joint ventures	1,664	1,880
Altis Wiregrass, LLC [Member]
Schedule of Equity Method Investments [Line Items]
Investments in and advances to unconsolidated real estate joint ventures	266	1,792
Altis LH-Miami Manager, LLC [Member]
Schedule of Equity Method Investments [Line Items]
Investments in and advances to unconsolidated real estate joint ventures	829	811
Altis Vineland Pointe [Member]
Schedule of Equity Method Investments [Line Items]
Investments in and advances to unconsolidated real estate joint ventures	5,122	4,712
Altis Miramar East/West [Member]
Schedule of Equity Method Investments [Line Items]
Investments in and advances to unconsolidated real estate joint ventures	2,690	2,631
The Altman Companies, LLC [Member]
Schedule of Equity Method Investments [Line Items]
Investments in and advances to unconsolidated real estate joint ventures	16,001	14,745
ABBX Guaranty, LLC [Member]
Schedule of Equity Method Investments [Line Items]
Investments in and advances to unconsolidated real estate joint ventures	3,750	3,750
Sunrise and Bayview Partners, LLC [Member]
Schedule of Equity Method Investments [Line Items]
Investments in and advances to unconsolidated real estate joint ventures	1,479	1,562
PGA Design Center Holdings, LLC [Member]
Schedule of Equity Method Investments [Line Items]
Investments in and advances to unconsolidated real estate joint ventures	996	996
CCB Miramar, LLC [Member]
Schedule of Equity Method Investments [Line Items]
Investments in and advances to unconsolidated real estate joint ventures	7,279	5,999
BBX/Label Chapel Trail Development, LLC [Member]
Schedule of Equity Method Investments [Line Items]
Investments in and advances to unconsolidated real estate joint ventures	153	1,126
L03/212 Partners, LLC [Member]
Schedule of Equity Method Investments [Line Items]
Investments in and advances to unconsolidated real estate joint ventures	1,934	2,087
PGA Lender, LLC [Member]
Schedule of Equity Method Investments [Line Items]
Investments in and advances to unconsolidated real estate joint ventures	2,111	2,111
Sky Cove, LLC [Member]
Schedule of Equity Method Investments [Line Items]
Investments in and advances to unconsolidated real estate joint ventures	4,053	4,178
All Other Investments In Real Estate Joint Ventures [Member]
Schedule of Equity Method Investments [Line Items]
Investments in and advances to unconsolidated real estate joint ventures	$ 163	$ 442