Debt, Net - Schedule of Debt (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
Mar. 31, 2021	Dec. 31, 2020
Debt instruments
Outstanding debt	$ 172,309	$ 161,418
Unamortized Discount and Debt Issuance Costs	2,579	2,503
Debt, Net	169,730	158,915
PPN JV Loan, due November 2025, bearing interest at 4.1%
Debt instruments
Outstanding debt	44,325	44,568
Unamortized Discount and Debt Issuance Costs	297	314
Debt, Net	$ 44,028	$ 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	$ 35,990	$ 36,084
Unamortized Discount and Debt Issuance Costs	1,072	1,079
Debt, Net	$ 34,918	$ 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	$ 31,061	$ 27,179
Unamortized Discount and Debt Issuance Costs	325	351
Debt, Net	$ 30,736	$ 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%
Debt instruments
Outstanding debt	$ 18,931	$ 18,066
Unamortized Discount and Debt Issuance Costs	347	284
Debt, Net	$ 18,584	$ 17,782
Effective interest rate (as a percent)	2.30%
Watercrest JV Loan, due June 2047, bearing interest at LIBOR plus 2.2% \| 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	$ 17,355	$ 15,921
Unamortized Discount and Debt Issuance Costs	191	198
Debt, Net	$ 17,164	$ 15,723
Effective interest rate (as a percent)	2.40%
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)	2.30%	2.30%
Airport Hotel Loan, due March 2025, bearing interest at LIBOR plus 2.0%, with a floor rate of 3.0%
Debt instruments
Outstanding debt	$ 7,184	$ 3,548
Unamortized Discount and Debt Issuance Costs	158	168
Debt, Net	$ 7,026	$ 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	$ 6,292	$ 6,294
Debt, Net	$ 6,292	$ 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	$ 5,363	$ 5,421
Unamortized Discount and Debt Issuance Costs	57	59
Debt, Net	$ 5,306	$ 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%
Beach Homes Loan, due May 2029, bearing interest at LIBOR plus 1.7%.
Debt instruments
Outstanding debt	$ 1,532	$ 1,545
Unamortized Discount and Debt Issuance Costs	17	17
Debt, Net	$ 1,515	$ 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%
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	$ 1,526
Unamortized Discount and Debt Issuance Costs	83
Debt, Net	$ 1,443
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%
Pier Park Outparcel Construction Loan, due March 2027, bearing interest at LIBOR plus 1.7%
Debt instruments
Outstanding debt	$ 1,436	$ 1,458
Unamortized Discount and Debt Issuance Costs	12	12
Debt, Net	$ 1,424	$ 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	$ 1,314	$ 1,334
Unamortized Discount and Debt Issuance Costs	20	21
Debt, Net	$ 1,294	$ 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%

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Effective interest rate for the funds borrowed under the debt agreement considering interest compounding and original issue discount or premium.

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Contractual interest rate for funds borrowed, under the debt agreement.

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