SUBSEQUENT EVENTS (Probable Acquisitions) (Details) (USD $)	Jun. 30, 2014 Tenants	Jul. 29, 2014 Subsequent Event [Member] 171 17th Street [Member] Office Property [Member] Tenants	Jul. 24, 2014 Subsequent Event [Member] 171 17th Street [Member] Office Property [Member] acre sqft
Subsequent Event [Line Items]
Net rentable area			509,237
Area of land			0.7
Purchase price			$ 132,500,000
Earnest money deposit, amount that may be forfeited			$ 4,000,000
Percent of occupany		89.00%
Number of tenants	500	11

Amount recognized as of the acquisition date for the assets, including goodwill, in excess of (less than) the aggregate liabilities assumed, less the noncontrolling interest in the acquiree.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 805

-SubTopic 20

-Section 50

-Paragraph 1

-Subparagraph (c)

-URI http://asc.fasb.org/extlink&oid=6910749&loc=d3e4845-128472

Name:	us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredGoodwillAndLiabilitiesAssumedLessNoncontrollingInterest
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant