Debt - Additional Information (Details) (USD $)	1 Months Ended	12 Months Ended
	Feb. 28, 2013	Dec. 31, 2007	Mar. 31, 2015	Dec. 31, 2014
Debt Instrument [Line Items]
Long term debt			$ 66,487,000	$ 63,804,000
Total community development district debt			22,600,000	22,700,000
Consolidated Variable Interest Entities | Pier Park North
Debt Instrument [Line Items]
Construction loan	41,000,000
Construction loan, term of optional renewal extension	2 years
In-substance defeased debt, interest payable at 5.62%, secured and paid by pledged treasury securities, due October 1, 2015
Debt Instrument [Line Items]
Long term debt		29,300,000	25,512,000	25,670,000
Long term debt, year of balloon payment		2015
Community Development District debt, secured by certain real estate and standby note purchase agreements, due through May 2039, interest payable at 2.25% to 7.0% | Community Development District debt, secured by certain real estate and standby note purchase agreements, due through May 2039, interest payable at 2.25% to 7.0%
Debt Instrument [Line Items]
Long term debt			7,186,000	6,516,000
Construction loan in the Pier Park North joint venture, due February 2016, bearing interest at LIBOR plus 210 basis points, or 2.27% and 2.26% at March 31, 2015 and December 31, 2014, respectively | Pier Park North Joint Venture Construction Loan
Debt Instrument [Line Items]
Long term debt			33,789,000	31,618,000
Construction loan in the Pier Park North joint venture, due February 2016, bearing interest at LIBOR plus 210 basis points, or 2.27% and 2.26% at March 31, 2015 and December 31, 2014, respectively | Pier Park North Joint Venture Construction Loan | Consolidated Variable Interest Entities | Pier Park North
Debt Instrument [Line Items]
Long term debt			$ 33,800,000	$ 31,600,000