Debt, Net - Schedule of Debt (Details) - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2021	Dec. 31, 2020
Debt instruments
Outstanding debt	$ 185,957	$ 161,418
Unamortized Discount and Debt Issuance Costs	2,871	2,503
Debt, Net	183,086	158,915
PPN JV Loan, due November 2025, bearing interest at 4.1%
Debt instruments
Outstanding debt	44,080	44,568
Unamortized Discount and Debt Issuance Costs	281	314
Debt, Net	$ 43,799	$ 44,254
Debt interest rate (as a percent)	4.10%	4.10%
PPC JV Loan, due June 2060, bearing interest at 4.0%
Debt instruments
Outstanding debt	$ 35,895	$ 36,084
Unamortized Discount and Debt Issuance Costs	1,065	1,079
Debt, Net	$ 34,830	$ 35,005
Debt interest rate (as a percent)	4.00%	4.00%
Watersound Origins Crossings JV Loan, due May 2024, bearing interest at 5.0%
Debt instruments
Outstanding debt	$ 34,596	$ 27,179
Unamortized Discount and Debt Issuance Costs	300	351
Debt, Net	$ 34,296	$ 26,828
Debt interest rate (as a percent)	5.00%	5.00%
Watercrest JV Loan, due June 2047, bearing interest at LIBOR plus 2.2% and swapped to a fixed rate of 4.4%
Debt instruments
Outstanding debt	$ 19,292	$ 18,066
Unamortized Discount and Debt Issuance Costs	334	284
Debt, Net	$ 18,958	$ 17,782
Debt interest rate (as a percent)	4.40%
Watercrest JV Loan, due June 2047, bearing interest at LIBOR plus 2.2% and swapped to a fixed rate of 4.4% | LIBOR
Debt instruments
Basis spread on variable rate (as a percent)	2.20%	2.20%
PPC II JV Loan, due October 2024, bearing interest at LIBOR plus 2.3%
Debt instruments
Outstanding debt	$ 17,390	$ 15,921
Unamortized Discount and Debt Issuance Costs	173	198
Debt, Net	$ 17,217	$ 15,723
Effective interest rate (as a percent)	2.20%
PPC II JV Loan, due October 2024, bearing interest at LIBOR plus 2.3% | LIBOR
Debt instruments
Basis spread on variable rate (as a percent)	2.10%	2.10%
Airport Hotel Loan, due March 2025, bearing interest at LIBOR plus 2.0%, with a floor rate of 3.0%
Debt instruments
Outstanding debt	$ 12,629	$ 3,548
Unamortized Discount and Debt Issuance Costs	148	168
Debt, Net	$ 12,481	$ 3,380
Floor rate (as a percent)	3.00%	3.00%
Effective interest rate (as a percent)	3.00%
Airport Hotel Loan, due March 2025, bearing interest at LIBOR plus 2.0%, with a floor rate of 3.0% | LIBOR
Debt instruments
Basis spread on variable rate (as a percent)	2.00%	2.00%
Community Development District debt, secured by certain real estate or other collateral, due May 2023 through May 2039, bearing interest at 3.6% to 6.0%
Debt instruments
Outstanding debt	$ 5,349	$ 6,294
Debt, Net	$ 5,349	$ 6,294
Community Development District debt, secured by certain real estate or other collateral, due May 2023 through May 2039, bearing interest at 3.6% to 6.0% | Minimum
Debt instruments
Debt interest rate (as a percent)	3.60%	3.60%
Community Development District debt, secured by certain real estate or other collateral, due May 2023 through May 2039, bearing interest at 3.6% to 6.0% | Maximum
Debt instruments
Debt interest rate (as a percent)	6.00%	6.00%
Beckrich Building III Loan, due August 2029, bearing interest at LIBOR plus 1.7%
Debt instruments
Outstanding debt	$ 5,305	$ 5,421
Unamortized Discount and Debt Issuance Costs	56	59
Debt, Net	$ 5,249	$ 5,362
Effective interest rate (as a percent)	1.80%
Beckrich Building III Loan, due August 2029, bearing interest at LIBOR plus 1.7% | LIBOR
Debt instruments
Basis spread on variable rate (as a percent)	1.70%	1.70%
Self-Storage Facility Loan, due November 2025, bearing interest at LIBOR plus 2.5%, with a floor rate of 3.0%
Debt instruments
Outstanding debt	$ 3,129
Unamortized Discount and Debt Issuance Costs	79
Debt, Net	$ 3,050
Floor rate (as a percent)	3.00%	3.00%
Effective interest rate (as a percent)	3.00%
Self-Storage Facility Loan, due November 2025, bearing interest at LIBOR plus 2.5%, with a floor rate of 3.0% | LIBOR
Debt instruments
Basis spread on variable rate (as a percent)	2.50%	2.50%
Breakfast Point Hotel Loan, due November 2042, bearing interest at LIBOR plus 2.8%, with a floor rate of 3.8%
Debt instruments
Outstanding debt	$ 2,705
Unamortized Discount and Debt Issuance Costs	196
Debt, Net	$ 2,509
Basis spread on variable rate (as a percent)	2.80%
Floor rate (as a percent)	3.80%
Effective interest rate (as a percent)	3.80%
Beach Homes Loan, due May 2029, bearing interest at LIBOR plus 1.7%.
Debt instruments
Outstanding debt	$ 1,518	$ 1,545
Unamortized Discount and Debt Issuance Costs	16	17
Debt, Net	$ 1,502	$ 1,528
Effective interest rate (as a percent)	1.80%
Beach Homes Loan, due May 2029, bearing interest at LIBOR plus 1.7%. | LIBOR
Debt instruments
Basis spread on variable rate (as a percent)	1.70%	1.70%
Pier Park Outparcel Construction Loan, due March 2027, bearing interest at LIBOR plus 1.7%
Debt instruments
Outstanding debt	$ 1,414	$ 1,458
Unamortized Discount and Debt Issuance Costs	11	12
Debt, Net	$ 1,403	$ 1,446
Effective interest rate (as a percent)	1.80%
Pier Park Outparcel Construction Loan, due March 2027, bearing interest at LIBOR plus 1.7% | LIBOR
Debt instruments
Basis spread on variable rate (as a percent)	1.70%	1.70%
WaterColor Crossings Construction Loan, due February 2029, bearing interest at LIBOR plus 1.7%
Debt instruments
Outstanding debt	$ 1,302	$ 1,334
Unamortized Discount and Debt Issuance Costs	19	21
Debt, Net	$ 1,283	$ 1,313
Effective interest rate (as a percent)	1.80%
WaterColor Crossings Construction Loan, due February 2029, bearing interest at LIBOR plus 1.7% | LIBOR
Debt instruments
Basis spread on variable rate (as a percent)	1.70%	1.70%
The Lodge 30A JV Loan, due January 2028, bearing interest at 3.8%
Debt instruments
Outstanding debt	$ 1,353
Unamortized Discount and Debt Issuance Costs	193
Debt, Net	$ 1,160
Debt interest rate (as a percent)	3.80%