Intangible Assets Intangible Assets (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]
Document Fiscal Year Focus	2014	2013	2012
Intangible Assets:
In-place leases, net of accumulated amortization of $62,302 and $26,239 in 2014 and 2013, respectively	$ 147,360	$ 152,830
Above-market tenant leases, net of accumulated amortization of $13,748 and $11,284 in 2014 and 2013, respectively	12,017	12,332
Finite Lived Intangible Asset Below Market Ground Leases Net	0	1,680
Goodwill	3,867us-gaap_Goodwill	4,131us-gaap_Goodwill	4,751us-gaap_Goodwill
Total Other Assets	163,244	170,973
Accumulated Amortization of Finite Lived Intangible Asset Acquired in Place Leases	62,302	26,239
Accumulated Amortization of Finite Lived Intangible Assets Above Market Leases	13,748	11,284
Accumulated Amortization of Finite Lived Intangible Assets Below Market Ground Leases	$ 0	$ 21

Accumulated amortization of finite-lived intangible asset, acquired-in-place leases.

No definition available.

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- Definition

Accumulated amortization of finite-lived intangible assets, above market leases.

+ References

No definition available.

+ Details

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- Definition

Accumulated Amortization of Finite Lived Intangible Assets Below Market Ground Leases

+ References

No definition available.

+ Details

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- Definition

This element represents the carrying value of identifiable intangible assets 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

No definition available.

+ Details

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- Definition

Finite Lived Intangible Asset Below Market Ground Leases Net

+ References

No definition available.

+ Details

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- Definition

This is focus fiscal year of the document report in CCYY format. For a 2006 annual report, which may also provide financial information from prior periods, fiscal 2006 should be given as the fiscal year focus. Example: 2006.

+ References

No definition available.

+ Details

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- Details

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- Definition

This element represents the amount of value allocated by a lessor (acquirer) to lease agreements which exist at acquisition of a leased property. Such amount may include the value assigned to existing tenant relationships and excludes the market adjustment component of the value assigned for above or below-market leases acquired.

+ References

No definition available.

+ Details

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- Definition

Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 20

-Section 50

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 20

-Section 45

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6388280&loc=d3e13770-109266

+ Details

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- Details

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- Definition

Carrying amount of finite-lived intangible assets, indefinite-lived intangible assets and goodwill. Goodwill is an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. Intangible assets are assets, not including financial assets, lacking physical substance.

+ References

No definition available.

+ Details

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