Real Estate Joint Ventures - Unconsolidated Joint Ventures (Details) $ in Thousands			3 Months Ended	9 Months Ended
	Jul. 05, 2019 USD ($)	Jan. 14, 2019 USD ($)	Sep. 30, 2019 USD ($)	Sep. 30, 2019 USD ($)	Dec. 31, 2018 USD ($)	Apr. 30, 2018 item
Investments
Notes receivable			$ 2,724	$ 2,724	$ 2,265
Investment in unconsolidated joint venture			4,299	4,299	1,105
Pier Park TPS JV
Investments
Number of units to be developed and constructed | item						124
Value of land contributed		$ 1,700
Cash contributed				200
Mitigation bank credits contributed				100
Investment in unconsolidated joint venture					$ 1,100
Net loss			$ 0	$ 0
Ownership percentage			50.00%	50.00%	50.00%
Summarized financial information - Balance Sheets
Investment in real estate			$ 10,905	$ 10,905	$ 285
Cash and cash equivalents			86	86	64
Total assets			10,991	10,991	349
Debt, net			2,787	2,787
Other liabilities			2,026	2,026	3
Equity			6,178	6,178	346
Total liabilities and equity			10,991	10,991	349
Pier Park TPS JV | Other assets.
Investments
Investment in unconsolidated joint venture			3,100	3,100	$ 1,100
Busy Bee JV
Investments
Notes receivable			200	200
Net loss			$ 0	$ 0
Ownership percentage			50.00%	50.00%
Summarized financial information - Balance Sheets
Investment in real estate			$ 1,865	$ 1,865
Cash and cash equivalents			554	554
Total assets			2,419	2,419
Other liabilities			39	39
Equity			2,380	2,380
Total liabilities and equity			2,419	2,419
Busy Bee JV | Other assets.
Investments
Value of land contributed	$ 1,400
Investment in unconsolidated joint venture			$ 1,200	$ 1,200