Contractual interest rate for funds borrowed, under the debt agreement.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22(a)(1))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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- Definition

Maximum contractual interest rate for funds borrowed, under the debt agreement.

+ References

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- Definition

Minimum contractual interest rate for funds borrowed, under the debt agreement.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22(a)(2))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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No definition available.

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Debt (Descriptors) (Details)	3 Months Ended	12 Months Ended
Debt (Descriptors) (Details)	Mar. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Debt Instrument [Line Items]
Debt interest rate			4.80%
Construction loan \| Refinanced loan in the Pier Park North joint venture, due November 2025, bearing interest at 4.1%
Debt Instrument [Line Items]
Debt interest rate	4.10%	4.10%
Secured debt \| Community Development District debt, secured by certain real estate and standby note purchase agreements, due May 2031 - May 2039, bearing interest at 3.1% to 7.0% at March 31, 2016
Debt Instrument [Line Items]
Debt instrument, minimum interest	3.10%	2.80%
Debt instrument, maximum interest	7.00%	7.00%