Organization (Details)	6 Months Ended
Jun. 30, 2014 Segment subsidiary Market
Real Estate Properties [Line Items]
Number of wholly-owned subsidiaries	2
Percentage ownership by sole general partner	99.90%
Percentage ownership by sole limited partner	0.10%
Percentage of annualized lease revenue	90.00%
Number of key markets	9
Number of operating segments	1
Unconsolidated Joint Venture [Member]
Real Estate Properties [Line Items]
Number of real estate properties	1
Office properties [Member]
Real Estate Properties [Line Items]
Number of real estate properties	73
Number of redevelopment assets	1
Square footage of real estate property	21,100,000
Percentage Leased as of Acquisition	87.00%

Number of Markets in which majority of annualized lease revenue is generated

No definition available.

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- Definition

The number of real estate properties owned as of the balance sheet date which are not in service because they are subject to redevelopment.

+ References

No definition available.

+ Details

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- Definition

Number Of Wholly Owned Management Subsidiaries

+ References

No definition available.

+ Details

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- Definition

Operating Leases, Income Statement, Percentage of Annualized Lease Revenue

+ References

No definition available.

+ Details

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- Definition

Percentage of Leased Real Estate Properties

+ References

No definition available.

+ Details

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- Definition

Area of a real estate property.

+ References

No definition available.

+ Details

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- Definition

Percentage investment held by the managing member or general partner of the limited liability company (LLC) or limited partnership (LP).

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 272

-SubTopic 10

-Section 50

-Paragraph 3

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=6373374&loc=d3e70478-108055

+ Details

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- Definition

The number of units or percentage investment held by one or more members or limited partners of the LLC or LP.

+ References

+ Details

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- Definition

Number of operating segments. An operating segment is a component of an enterprise: (a) that engages in business activities from which it may earn revenues and incur expenses (including revenues and expenses relating to transactions with other components of the same enterprise), (b) whose operating results are regularly reviewed by the enterprise's chief operating decision maker to make decisions about resources to be allocated to the segment and assess its performance, and (c) for which discrete financial information is available. An operating segment may engage in business activities for which it has yet to earn revenues, for example, start-up operations may be operating segments before earning revenues.

+ References

No definition available.

+ Details

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- Definition

The number of real estate properties owned as of the balance sheet date.

+ References

No definition available.

+ Details

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- Details

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