Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities

No definition available.

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- Definition

This item represents disclosure of the amount of dividends or other distributions received from unconsolidated subsidiaries accounted for under the equity method of accounting that constitute a return of investment, not a return on investment (which are classified in operating activities).

+ References

No definition available.

+ Details

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- Definition

Outstanding amount of mortgage note payable of joint venture.

+ References

No definition available.

+ Details

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- Definition

Ownership percentage of partner in Joint Venture.

+ References

No definition available.

+ Details

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- Definition

Percentage of Sales Proceeds Received at Closing

+ References

No definition available.

+ Details

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- Definition

Potential Proceeds from Sale

+ References

No definition available.

+ Details

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Balance Type:	credit
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- Definition

Area of a real estate property.

+ References

No definition available.

+ Details

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Data Type:	num:areaItemType
Balance Type:	na
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- Definition

Long-lived assets that are held for sale apart from normal operations and anticipated to be sold in less than one year.

+ References

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 157

-Paragraph 33

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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.

+ Details

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Data Type:	xbrli:monetaryItemType
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- Definition

Amount of cash paid to acquire the entity.

+ References

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 141R

-Paragraph 68

-Subparagraph f(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.

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 141

-Paragraph 51

-Subparagraph d

-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.

+ Details

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- Definition

The total cost of the acquired entity including the cash paid to shareholders of acquired entities, fair value of debt and equity securities issued to shareholders of acquired entities, the fair value of the liabilities assumed, and direct costs of the acquisition.

+ References

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 141

-Paragraph 51

-Subparagraph d

-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.

+ Details

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- Definition

This element represents acquisition-related costs incurred to effect a business combination which costs have been expensed during the period. Such costs include finder's fees; advisory, legal, accounting, valuation, and other professional or consulting fees; general administrative costs, including the costs of maintaining an internal acquisitions department; and may include costs of registering and issuing debt and equity securities.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 805

-SubTopic 10

-Section 25

-Paragraph 23

-URI http://asc.fasb.org/extlink&oid=21917927&loc=d3e1043-128460

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 141R

-Paragraph 59

-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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- Definition

Amount of gain (loss), after tax expense or benefit and not previously recognized, resulting from the sale of a business component.

+ References

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 144

-Paragraph 47

-Subparagraph b

-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.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 205

-SubTopic 20

-Section 45

-Paragraph 3

-URI http://asc.fasb.org/extlink&oid=6892542&loc=d3e957-107759

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 144

-Paragraph 43

-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.

Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 205

-SubTopic 20

-Section 50

-Paragraph 1

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=6360339&loc=d3e1361-107760

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- Definition

Cash received from the sale of real estate that is held for investment, that is, it is part of an investing activity during the period.

+ References

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 95

-Paragraph 16

-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.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 12

-Subparagraph (c)

-URI http://asc.fasb.org/extlink&oid=6943989&loc=d3e3179-108585

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Property Transactions (Textual) (Details) (USD $)	12 Months Ended								12 Months Ended			1 Months Ended
Property Transactions (Textual) (Details) (USD $)	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2012 Third party management and leasing business [Member] Rate	Dec. 31, 2011 Third party management and leasing business [Member]	Dec. 31, 2010 Third party management and leasing business [Member]	Dec. 31, 2012 MSREF Terminus Two Hundred LLC [Member] sqft	Feb. 28, 2013 MSREF Terminus Two Hundred LLC [Member] Subsequent Event [Member]	Dec. 31, 2012 2100 Ross Avenue [Member] sqft	Dec. 31, 2011 Promenade Atlanta GA [Member] sqft	Feb. 28, 2013 Terminus Two Hundred LLC [Member] MSREF Terminus Two Hundred LLC [Member] Subsequent Event [Member]	Feb. 28, 2013 Terminus One Hundred LLC [Member] MSREF Terminus Two Hundred LLC [Member] Subsequent Event [Member]	Feb. 28, 2013 Post Oak Central [Member] Subsequent Event [Member] sqft	Feb. 28, 2013 Post Oak Central [Member] MSREF Terminus Two Hundred LLC [Member] Subsequent Event [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Potential proceeds from sale of properties				$ 15,400,000
Percentage of sales proceeds received at closing (percent)				63.50%
Gain on sale of discontinued investment properties	18,407,000	8,519,000	7,216,000	7,459,000	0	0
Square footage of real estate property (square feet)							566,000		844,000	775,000			1,300,000
Purchase price of building									59,200,000	134,700,000	53,400,000	135,800,000
Liabilities assumed									4,200,000
Acquisition costs related to purchase									408,000	292,000
Distributions from Unconsolidated Joint Ventures	67,435,000	8,428,000	16,024,000
Ownership Percentage of partner joint venture (percent)								50.00%			80.00%	50.00%
Fair value of assets											164,000,000	209,200,000
Outstanding amount of mortgage note payable of joint venture											74,500,000
Proceeds from investment property sales	273,386,000	143,623,000	101,706,000									112,100,000
Purchase price of property purchase														$ 232,600,000