Joint Ventures - Consolidated Joint Ventures (Details) - item	9 Months Ended	12 Months Ended
	Sep. 30, 2020	Dec. 31, 2019	Apr. 30, 2017
Lodge 30A JV
Variable interest entity
Variable interest entity, ownership percentage	52.80%
Pier Park Resort Hotel JV
Variable interest entity
Number of units to be developed and constructed	255
Variable interest entity, ownership percentage	70.00%
Pier Park Crossings Phase II JV
Variable interest entity
Number of units to be developed and constructed	120
Variable interest entity, ownership percentage	75.00%	75.00%
Reliant Title JV
Variable interest entity
Variable interest entity, ownership percentage	66.00%	66.00%
Watercrest JV
Variable interest entity
Number of units to be developed and constructed	107
Variable interest entity, ownership percentage	87.00%	87.00%
Watersound Origins Crossings JV
Variable interest entity
Number of units to be developed and constructed	217
Variable interest entity, ownership percentage	75.00%	75.00%
Pier Park Crossings JV
Variable interest entity
Number of units to be developed and constructed			240
Variable interest entity, ownership percentage	75.00%	75.00%
Pier Park North JV
Variable interest entity
Variable interest entity, ownership percentage	60.00%	60.00%