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Consolidated Statements of Cash Flows (Unaudited) (Parenthetical) (Olney Center, USD $) In Millions, unless otherwise specified | 1 Months Ended | 9 Months Ended
--- | --- | ---
Apr. 30, 2014 | Sep. 30, 2014
Olney Center |  |
Real Estate Properties [Line Items] |  |
Proceeds from sale of real estate | $ 11.0 | $ 11.0

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- Definition Cash received for the sale of real estate that is not part of an investing activity during the current period. + References Reference 1: 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=31042434&loc=d3e3179-108585 + Details
Name: | us-gaap_ProceedsFromSaleOfRealEstate
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Details
Name: | us-gaap_RealEstatePropertiesLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration