Debt - Schedule of Debt (Details) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
Sep. 30, 2019	Dec. 31, 2018
Debt instruments
Debt, Principal	$ 87,130	$ 70,976
Unamortized Discount and Debt Issuance Costs	1,549	1,602
Debt, Net	85,581	69,374
PPN JV Loan, due November 2025, bearing interest at 4.1%
Debt instruments
Debt, Principal	45,745	46,423
Unamortized Discount and Debt Issuance Costs	396	446
Debt, Net	$ 45,349	$ 45,977
Debt interest rate (as a percent)	4.10%	4.10%
Pier Park Crossings JV Loan, due June 2060, bearing interest at 4.0%
Debt instruments
Debt, Principal	$ 29,717	$ 15,399
Unamortized Discount and Debt Issuance Costs	1,094	1,114
Debt, Net	$ 28,623	$ 14,285
Debt interest rate (as a percent)	4.00%	4.00%
Community Development District debt
Debt instruments
Debt, Principal	$ 7,079	$ 6,324
Debt, Net	$ 7,079	$ 6,324
Community Development District debt \| Minimum
Debt instruments
Debt interest rate (as a percent)	3.60%	3.60%
Community Development District debt \| Maximum
Debt instruments
Debt interest rate (as a percent)	6.00%	6.00%
Beach Homes Loan, due May 2029, bearing interest at LIBOR plus 1.7%.
Debt instruments
Debt, Principal	$ 1,605
Unamortized Discount and Debt Issuance Costs	20
Debt, Net	$ 1,585
Effective interest rate (as a percent)	3.70%
Beach Homes Loan, due May 2029, bearing interest at LIBOR plus 1.7%. \| LIBOR
Debt instruments
Basis spread on variable rate	1.70%	1.70%
Pier Park Outparcel Construction Loan, due March 2027, bearing interest at LIBOR plus 1.7%
Debt instruments
Debt, Principal	$ 1,550	$ 1,585
Unamortized Discount and Debt Issuance Costs	15	16
Debt, Net	$ 1,535	$ 1,569
Effective interest rate (as a percent)	3.70%
Pier Park Outparcel Construction Loan, due March 2027, bearing interest at LIBOR plus 1.7% \| LIBOR
Debt instruments
Basis spread on variable rate	1.70%	1.70%
WaterColor Crossings Construction Loan, due February 2029, bearing interest at LIBOR plus 1.7%
Debt instruments
Debt, Principal	$ 1,434	$ 1,245
Unamortized Discount and Debt Issuance Costs	24	26
Debt, Net	$ 1,410	$ 1,219
Effective interest rate (as a percent)	3.70%
WaterColor Crossings Construction Loan, due February 2029, bearing interest at LIBOR plus 1.7% \| LIBOR
Debt instruments
Basis spread on variable rate	1.70%	1.70%

Percentage points added to the reference rate to compute the variable rate on the debt instrument.

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- Definition

Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
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- Definition

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

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 20
-Section 50
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- Definition

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

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

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Amount of unamortized debt discount (premium) and debt issuance costs.

+ References

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- Definition

Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
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