Joint Ventures - Unconsolidated JV Debt (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020	Jun. 30, 2020
Investments
Outstanding debt	$ 198,880	$ 161,418
Unconsolidated joint ventures
Investments
Maximum exposure to loss	71,300
Unconsolidated joint ventures
Investments
Outstanding debt	66,583	33,088
Latitude Margaritaville Watersound JV
Investments
Outstanding debt	14,162	3,297
Sea Sound Apartments JV
Investments
Outstanding debt	31,833	8,789
Pier Park TPS JV
Investments
Outstanding debt	14,196	14,388
Busy Bee JV (SJBB, LLC)
Investments
Outstanding debt	6,392	6,614
Latitude Margaritaville Watersound JV
Investments
Amount as lender of secured revolving promissory note	$ 10,000	$ 10,000	$ 10,000