Other Income, Net - Gain on Land Contribution and Other Income, Net (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Other Income, Net
Gain on land contribution and mitigation credits	$ 19,983	$ 2,317
Busy Bee JV (SJBB, LLC)
Other Income, Net
Gain on land contributed		800
Pier Park TPS JV
Other Income, Net
Gain on land contributed		1,400
Gain on land contribution and mitigation credits		$ 1,500
Sea Sound Apartments JV
Other Income, Net
Gain on land contributed	3,900
Sea Sound Apartments JV
Other Income, Net
Gain on land contribution and mitigation credits	4,300
Latitude Margaritaville Watersound JV
Other Income, Net
Gain on land contributed	15,300
Gain on additional infrastructure improvements contributed	400
Gain on land contribution and mitigation credits	15,700
Net present value of land contribution	16,600
Land contributed, at cost	$ 1,300
Imputed interest rate (as a percent)	5.75%