Other Assets Notes Receivable, net (Details) - USD ($)	1 Months Ended
	Jan. 31, 2017	Dec. 31, 2016	Nov. 30, 2016	Dec. 31, 2015
Loans and Leases Receivable Disclosure [Line Items]
Notes receivable, net		$ 1,926,000		$ 2,555,000
Allowance for notes receivable		0		0
Pier Park Community Development District notes, non-interest bearing, due September 2022, effective rates 5.93% — 6.50% through November 2016
Loans and Leases Receivable Disclosure [Line Items]
Notes receivable, net		1,684,000		1,985,000
Pier Park Community Development District notes, non-interest bearing, due September 2022, effective rates 5.93% — 6.50% through November 2016 | Minimum
Loans and Leases Receivable Disclosure [Line Items]
Mortgage loans, stated interest rate			5.93%
Pier Park Community Development District notes, non-interest bearing, due September 2022, effective rates 5.93% — 6.50% through November 2016 | Maximum
Loans and Leases Receivable Disclosure [Line Items]
Mortgage loans, stated interest rate			6.50%
Interest bearing homebuilder notes, secured by the real estate sold — 4.0% interest rate, due December 2016, paid January 2017
Loans and Leases Receivable Disclosure [Line Items]
Notes receivable, net		$ 33,000		90,000
Mortgage loans, stated interest rate		4.00%
Various mortgage notes, secured by certain real estate, bearing interest at various rates
Loans and Leases Receivable Disclosure [Line Items]
Notes receivable, net		$ 209,000		$ 480,000
Subsequent Event
Loans and Leases Receivable Disclosure [Line Items]
Proceeds from collection of homebuilder notes	$ 33,000