Notes Receivable, net (Parenthetical) (Details) (USD $)							9 Months Ended	12 Months Ended
	Sep. 30, 2014	Dec. 31, 2013	Sep. 30, 2014 Interest bearing homebuilder note for the RiverTown Sale, secured by the real estate sold — 5.25% interest rate, annual principal payment of $1.0 million due March 2015 and with all accrued interest and remaining principal and interest payment due June 2015	Apr. 02, 2014 Interest bearing homebuilder note for the RiverTown Sale, secured by the real estate sold — 5.25% interest rate, annual principal payment of $1.0 million due March 2015 and with all accrued interest and remaining principal and interest payment due June 2015	Sep. 30, 2014 Interest bearing homebuilder notes, secured by the real estate sold — 4.0% interest rate, annual principal payments of $0.3 million, any remaining payments outstanding are due February and August 2015, net of deferred profit of $0.1 million and $0.7 million at September 30, 2014 and December 31, 2013, respectively	Dec. 31, 2013 Interest bearing homebuilder notes, secured by the real estate sold — 4.0% interest rate, annual principal payments of $0.3 million, any remaining payments outstanding are due February and August 2015, net of deferred profit of $0.1 million and $0.7 million at September 30, 2014 and December 31, 2013, respectively	Sep. 30, 2014 Pier Park Community Development District notes, non-interest bearing, due December 2024, net of unamortized discount of $0.1 million, effective rates 5.73% — 8.0%	Dec. 31, 2013 Pier Park Community Development District notes, non-interest bearing, due December 2024, net of unamortized discount of $0.1 million, effective rates 5.73% — 8.0%	Sep. 30, 2014 Pier Park Community Development District notes, non-interest bearing, due December 2024, net of unamortized discount of $0.1 million, effective rates 5.73% — 8.0% Minimum	Dec. 31, 2013 Pier Park Community Development District notes, non-interest bearing, due December 2024, net of unamortized discount of $0.1 million, effective rates 5.73% — 8.0% Minimum	Sep. 30, 2014 Pier Park Community Development District notes, non-interest bearing, due December 2024, net of unamortized discount of $0.1 million, effective rates 5.73% — 8.0% Maximum	Dec. 31, 2013 Pier Park Community Development District notes, non-interest bearing, due December 2024, net of unamortized discount of $0.1 million, effective rates 5.73% — 8.0% Maximum
Accounts, Notes, Loans and Financing Receivable [Line Items]
Notes receivable, effective interest rate			5.25%	5.25%	4.00%	4.00%			5.73%	5.73%	8.00%	8.00%
Note receivable, Annual principal payments			$ 1,000,000.0		$ 300,000.0
Note receivable, deferred profit	15,444,000	28,551,000			100,000	700,000
Note receivable, maturity date							2024-12	2024-12
Unamortized discount							$ 100,000	$ 100,000