Amortization for Acquired In-Place Leases During Next Five Years and Thereafter Assuming No Early Lease Terminations (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012
In-place leases
Acquired Finite-Lived Intangible Assets [Line Items]
2013	$ 8,810
2014	6,047
2015	5,085
2016	4,187
2017	3,368
Thereafter	6,811
Acquired lease intangible assets, net	34,308
Above Market Leases
Acquired Finite-Lived Intangible Assets [Line Items]
2013	3,727
2014	2,296
2015	1,885
2016	1,360
2017	986
Thereafter	1,229
Acquired lease intangible assets, net	11,483
Below Market Leases
Acquired Finite-Lived Intangible Assets [Line Items]
2013	5,836
2014	5,119
2015	4,779
2016	4,609
2017	4,200
Thereafter	29,807
Acquired lease intangible assets, net	$ 54,350

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Amount of amortization expense expected to be recognized after the fifth fiscal year following the latest fiscal year for assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

+ References

No definition available.

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- Definition

Amount of amortization expense expected to be recognized during the next fiscal year following the latest fiscal year for assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

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Amount of amortization expense expected to be recognized during the fifth fiscal year following the latest fiscal year for assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

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- Definition

Amount of amortization expense expected to be recognized during the fourth fiscal year following the latest fiscal year for assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

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Amount of amortization expense expected to be recognized during the third fiscal year following the latest fiscal year for assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

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Amount of amortization expense expected to be recognized during the second fiscal year following the latest fiscal year for assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

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- Definition

Amount after amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 30

-Section 50

-Paragraph 2

-Subparagraph (a)(1)

-URI http://asc.fasb.org/extlink&oid=7658586&loc=d3e16323-109275

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 142

-Paragraph 45

-Subparagraph a(1)

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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