Reportable Segments (Assets) (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Total Assets
Total Assets	$ 1,573,545	$ 948,829
Operating Segments | Domestic office investments
Total Assets
Total Assets	124,144	130,021
Operating Segments | Domestic residential/living investments
Total Assets
Total Assets	220,988	126,175
Operating Segments | Domestic retail investments
Total Assets
Total Assets	292,526	199,819
Operating Segments | Domestic industrial investments
Total Assets
Total Assets	51,520	51,103
Operating Segments | International industrial investments
Total Assets
Total Assets	494,268	190,001
Operating Segments | International office investments
Total Assets
Total Assets	122,342	122,471
Operating Segments | International residential/living investments
Total Assets
Total Assets	211,785	111,803
Corporate-level accounts
Total Assets
Total Assets	$ 55,972	$ 17,436