Real Estate Joint Ventures - Additional Information (Details) (USD $)							12 Months Ended			3 Months Ended					9 Months Ended
	Sep. 30, 2013		Dec. 31, 2012		Sep. 30, 2012	Dec. 31, 2011	Dec. 31, 2012 Consolidated Variable Interest Entities	Sep. 30, 2013 Consolidated Variable Interest Entities	Feb. 28, 2013 Consolidated Variable Interest Entities	Sep. 30, 2013 Consolidated Variable Interest Entities Pier Park North	Dec. 31, 2012 Consolidated Variable Interest Entities Scenario one	Sep. 30, 2013 Consolidated Variable Interest Entities Scenario two	Sep. 30, 2013 Variable Interest Entities	Dec. 31, 2012 Variable Interest Entities	Sep. 30, 2013 Unconsolidated Variable Interest Entities Entity
Variable Interest Entity [Line Items]
Estimated contribution for joint venture by company and its partner							$ 15,000,000
Estimated contribution for joint venture							9,900,000
Contribution for joint venture								6,000,000		3,100,000
Land contributed to joint venture agreed upon value								6,000,000
Proceeds from sale of property										2,300,000
Construction loan									40,500,000
Construction loan date									2016-02
Principal repayment guarantee								33.00%
Unrestricted cash and cash equivalents	22,831,000		165,980,000		172,398,000	162,391,000		25,000,000					2,203,000	2,107,000
Net worth								350,000,000
Percentage of total equity paid by parent								76.00%
Initial profits to be redistributed to repay contribution								6,000,000
Percentage of additional cash contribution for joint venture										34.00%
Noncontrolling Interest, Ownership Percentage by Parent								66.00%			66.00%	74.00%
Assets	667,072,000		645,521,000										18,738,000	2,273,000
Liabilities	105,744,000		93,187,000										7,344,000	1,073,000
Number of variable interest Entity, not primary beneficiary															3
Investment in unconsolidated affiliates	$ 2,183,000	[1]	$ 2,222,000	[1]

[1] Recorded in the Company’s resorts, leisure and leasing operations' segment.