Acquisitions - Schedule of Acquisition Cost of Shopping Centers (Detail) (Shopping Center Acquired [Member], USD $) In Thousands, unless otherwise specified	3 Months Ended
Mar. 31, 2015
Business Acquisition [Line Items]
Land	$ 27,268
Buildings	21,086
Tenant improvements	204
Other assets	277
Assets acquired	53,042
Less: Mortgage debt assumed at fair value	(33,735)
Less: Below-market leases	(3,526)us-gaap_BelowMarketLeaseNet
Less: Other liabilities assumed	(101)
Net assets acquired	15,680
In-Place Leases (Including Lease Origination Costs and Fair Market Value of Leases) [Member]
Business Acquisition [Line Items]
Intangible assets acquired	2,483
Weighted Average Amortization Period	6 years 1 month 6 days
Tenant Relations [Member]
Business Acquisition [Line Items]
Intangible assets acquired	$ 1,724
Weighted Average Amortization Period	10 years 9 months 18 days
Below-Market Leases [Member]
Business Acquisition [Line Items]
Weighted Average Amortization Period	19 years 4 months 24 days

Amount of tenant improvements acquired as part of a real property acquisition with a finite life.

No definition available.

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- Definition

Weighted average amortization period of finite-lived intangible assets acquired either individually or as part of a group of assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 30

-Section 50

-Paragraph 1

-Subparagraph (a)(3)

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- Definition

Amount after amortization of leases acquired as part of a real property acquisition at below market lease rate with a finite life.

+ References

No definition available.

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- Definition

Amount of assets acquired at the acquisition date.

+ References

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- Definition

Amount of facility held for productive use including, but not limited to, office, production, storage and distribution facilities, acquired at the acquisition date.

+ References

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- Definition

The amount of identifiable intangible assets recognized as of the acquisition date.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 805

-SubTopic 20

-Section 50

-Paragraph 1

-Subparagraph (c)

-URI http://asc.fasb.org/extlink&oid=39739317&loc=d3e4845-128472

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-Publisher FASB

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-Topic 805

-SubTopic 10

-Section 55

-Paragraph 37

-URI http://asc.fasb.org/extlink&oid=35744172&loc=d3e2207-128464

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- Definition

Amount of real estate acquired, at the acquisition date.

+ References

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- Definition

Amount recognized as of the acquisition date for the identifiable assets acquired in excess of (less than) the aggregate liabilities assumed.

+ References

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- Definition

Amount of long-term debt due after one year or the normal operating cycle, if longer, assumed at the acquisition date.

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- Definition

Amount of other liabilities due after one year or the normal operating cycle, if longer, assumed at the acquisition date.

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- Definition

Amount of other assets expected to be realized or consumed after one year or the normal operating cycle, if longer, acquired at the acquisition date.

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