Real Estate Investments and Properties Held for Sale - Schedule of Revenue from External Customers and Long-Lived Assets, by Geographical Areas (Details)	9 Months Ended
Sep. 30, 2016	Sep. 30, 2015
United Kingdom
Revenues from External Customers and Long-Lived Assets [Line Items]
Entity-wide revenue percentage	17.30%	19.60%
Texas
Revenues from External Customers and Long-Lived Assets [Line Items]
Entity-wide revenue percentage	11.20%	11.40%

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.

No definition available.

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Period Type:	duration