Acquired In-Place Leases and Above/Below Market Leases Summary of Acquired Lease Intangibles (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Finite-Lived Intangible Assets, Gross [Abstract]
Acquired lease intangible assets	$ 5,103	$ 7,399
Net of accumulated amortization of other intangible assets	(1,590)	(1,554)
Below Market Lease [Abstract]
Below market leases	70,013us-gaap_BelowMarketLeaseGross	76,502us-gaap_BelowMarketLeaseGross
Accumulated accretion	(27,161)	(28,592)
Acquired lease intangible liabilities, net	42,852us-gaap_BelowMarketLeaseNet	47,910us-gaap_BelowMarketLeaseNet
In-place leases
Finite-Lived Intangible Assets, Gross [Abstract]
Acquired lease intangible assets	53,967	62,813
Net of accumulated amortization of other intangible assets	(35,336)	(38,279)
Acquired lease intangible assets, net	18,631
Above Market Leases
Finite-Lived Intangible Assets, Gross [Abstract]
Acquired lease intangible assets	22,500	28,279
Net of accumulated amortization of other intangible assets	(17,397)	(20,880)
Acquired lease intangible assets, net	5,103
Acquired lease intangible assets
Finite-Lived Intangible Assets, Gross [Abstract]
Acquired lease intangible assets, net	$ 23,734	$ 31,933

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Amount of accumulated 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 before 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 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

This element represents the identifiable intangible asset established upon acquisition based on a favorable difference between the terms of an acquired lease and the current market terms for that lease at the acquisition date.

+ 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 210.5-02.15)

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

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- Definition

Accumulated amount of 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=26713463&loc=d3e16323-109275

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

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