Noncontrolling Investments (Detail)	12 Months Ended
Dec. 31, 2013
Bermuda Crossroads
Real Estate Properties [Line Items]
Property	Bermuda Crossroads
Type	Retail
Location	Chester, VA
Ownership %	50.00%
Smith's Landing
Real Estate Properties [Line Items]
Property	Smith's Landing
Type	Multifamily
Location	Blacksburg, VA
Ownership %	40.00%

The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 323

-SubTopic 10

-Section 50

-Paragraph 3

-Subparagraph (a)(1)

-URI http://asc.fasb.org/extlink&oid=6382943&loc=d3e33918-111571

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Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant