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Real Estate Real Estate (Details) - USD ($)
Sep. 30, 2016
Dec. 31, 2015
Real Estate [Abstract]    
Properties in operation $ 441,795,000 $ 226,055,000
Properties under development 666,687,000 710,312,000
Total 1,108,482,000 936,367,000
Real Estate Investment Property, Accumulated Depreciation $ 13,345,000 $ 9,073,000