Consolidation of Joint Ventures and Long-Term Debt Long-Term Debt Assumptions, Maturities and Interest Rates (Details) - USD ($)	9 Months Ended
Sep. 30, 2017	Sep. 24, 2016
Debt Instrument [Line Items]
Loans Assumed	$ 0.00	$ 63,971,000
JV Loans [Member] \| Minimum [Member]
Debt Instrument [Line Items]
Debt Instrument Maturity Month And Year	June 2020
Debt Instrument, Basis Spread on Variable Rate	1.75%
JV Loans [Member] \| Maximum [Member]
Debt Instrument [Line Items]
Debt Instrument Maturity Month And Year	April 2027
Debt Instrument, Basis Spread on Variable Rate	2.50%
Shopping Center Loans [Member] \| Minimum [Member]
Debt Instrument [Line Items]
Debt Instrument Maturity Month And Year	October 2017
Debt Instrument, Interest Rate, Stated Percentage	3.70%
Shopping Center Loans [Member] \| Maximum [Member]
Debt Instrument [Line Items]
Debt Instrument Maturity Month And Year	January 2027
Debt Instrument, Interest Rate, Stated Percentage	7.50%

Date when the debt instrument maturity is scheduled to be fully repaid, in Month and Year format.

No definition available.

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- Definition

Percentage points added to the reference rate to compute the variable rate on the debt instrument.

+ References

No definition available.

+ Details

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- Definition

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)(1))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

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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.

+ References

No definition available.

+ Details

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- Definition

The fair value of loans assumed in noncash investing or financing activities.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 50
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=98513485&loc=d3e4332-108586

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 50
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=98513485&loc=d3e4304-108586

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 50
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=98513485&loc=d3e4313-108586

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- Details

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