Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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

Interim Financial Statements (Details)	1 Months Ended
Interim Financial Statements (Details)	Jul. 31, 2004 shares	Jun. 30, 2015 CommercialProperties	Dec. 31, 2014 CommercialProperties
Real Estate Properties [Line Items]
Reorganization and conversion, number of common shares (in shares)	1.42857
Wholly Owned Properties [Member]
Real Estate Properties [Line Items]
Number of commercial properties (in commercial properties) \| CommercialProperties		65	63