Other Assets - Notes Receivable (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Receivables
Notes receivable	$ 3,252	$ 2,265
Proceeds from collection of principal	1,165	3,004	$ 68
Allowance for notes receivable	0	0
Interest bearing homebuilder note - 5.5% interest rate, due June 2021
Receivables
Notes receivable	$ 1,514
Interest rate (as a percent)	5.50%
Interest bearing homebuilder note - 5.5% interest rate, due December 2021
Receivables
Notes receivable	$ 872
Interest rate (as a percent)	5.50%
Interest bearing note with a JV partner, secured by the partner's membership interest in the JV - 8.0% interest rate, due May 2039
Receivables
Notes receivable	$ 363
Interest rate, note (as a percent)	8.00%
Interest bearing note with a JV partner, secured by the partner's membership interest in the JV - 8.0% interest rate, due July 2039
Receivables
Notes receivable	$ 206
Interest rate, note (as a percent)	8.00%
Interest bearing homebuilder note - 6.3% interest rate, due March 2020
Receivables
Notes receivable	$ 128	$ 150
Interest rate (as a percent)	6.30%	6.30%
Various mortgage notes, secured by certain real estate, bearing interest at various rates
Receivables
Notes receivable	$ 85	$ 141
Interest gearing homebuilder note - 5.5% interest rate, due June 2020
Receivables
Notes receivable	$ 84	$ 422
Interest rate (as a percent)	5.50%	5.50%
Interest bearing homebuilder note - 5.5% interest rate, paid in December 2019
Receivables
Notes receivable		$ 749
Interest rate (as a percent)	5.50%	5.50%
Pier Park Community Development District notes, non-interest bearing, paid in full August 2019
Receivables
Notes receivable		$ 803