Other Assets - Schedule of Notes Receivable, net (Details) - USD ($)	1 Months Ended	2 Months Ended	12 Months Ended
	Jan. 31, 2017	Feb. 26, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Loans and Leases Receivable Disclosure [Line Items]
Notes receivable			$ 9,522,000	$ 1,926,000
Proceeds from collection of homebuilder notes			68,000	328,000	$ 21,552,000
Allowance for notes receivable			0	0
PCR Note
Loans and Leases Receivable Disclosure [Line Items]
Notes receivable			$ 5,000,000	0
Interest rate on loans receivable			10.00%
Pier Park Community Development District notes, non-interest bearing, due September 2022
Loans and Leases Receivable Disclosure [Line Items]
Notes receivable			$ 1,527,000	1,684,000
Interest Bearing - 5.5% interest rate due November 2019
Loans and Leases Receivable Disclosure [Line Items]
Notes receivable			$ 1,060,000	0
Interest rate			5.50%
Principal receivable amount			$ 100,000
Interest Bearing - 5.5% interest rate due September 2019
Loans and Leases Receivable Disclosure [Line Items]
Notes receivable			$ 904,000	0
Interest rate			5.50%
Principal receivable amount			$ 100,000
Interest Bearing - 5.5% interest rate due June 2019
Loans and Leases Receivable Disclosure [Line Items]
Notes receivable			$ 857,000	0
Interest rate			5.50%
Principal receivable amount			$ 100,000
Interest Bearing - 4.0% interest rate due 2016
Loans and Leases Receivable Disclosure [Line Items]
Notes receivable			$ 0	33,000
Interest rate			4.00%
Proceeds from collection of homebuilder notes	$ 33,000
Various mortgage notes, secured by certain real estate, bearing interest at various rates
Loans and Leases Receivable Disclosure [Line Items]
Notes receivable			$ 174,000	$ 209,000
Subsequent Event | PCR Note
Loans and Leases Receivable Disclosure [Line Items]
Proceeds from collection of homebuilder notes		$ 5,000,000