Ownership percentage of partner in Joint Venture.

No definition available.

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- Definition

Area of a real estate property.

+ References

No definition available.

+ Details

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- Definition

Face (par) amount of debt instrument at time of issuance.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 835

-SubTopic 30

-Section 45

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=6451184&loc=d3e28551-108399

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 835

-SubTopic 30

-Section 55

-Paragraph 8

-URI http://asc.fasb.org/extlink&oid=6584090&loc=d3e28878-108400

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- Definition

Fair value portion of debt instrument payable, including, but not limited to, notes payable and loans payable.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 825

-SubTopic 10

-Section 50

-Paragraph 10

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=28364263&loc=d3e13433-108611

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 825

-SubTopic 10

-Section 50

-Paragraph 12

-URI http://asc.fasb.org/extlink&oid=28364263&loc=d3e13476-108611

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- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

+ References

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 22

-Article 5

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.22(a)(1))

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

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Notes Payable (Details Textual) (Details) (USD $)	Sep. 30, 2013	Dec. 31, 2012	Sep. 30, 2013 Terminus One Hundred LLC [Member]	Feb. 28, 2013 Terminus One Hundred LLC [Member]	Sep. 06, 2013 Post Oak Central [Member] sqft	Sep. 06, 2013 Promenade D Atlanta GA [Member] sqft	Sep. 06, 2013 Post Oak Central Mortgage Note [Member] Post Oak Central [Member]	Sep. 06, 2013 Promenade Atlanta Mortgage Note [Member] Promenade D Atlanta GA [Member]
Notes Payable [Line Items]
Debt Instrument, Face Amount			$ 82,000,000				$ 188,800,000.0	$ 114,000,000.0
Area of Real Estate Property					1,300,000	780,000
Debt Instrument, Interest Rate, Stated Percentage							4.26%	4.27%
Ownership Percentage of Partner in Joint Venture				50.00%
Debt Instrument, Fair Value Disclosure	$ 746,400,000	$ 456,000,000