XML 61 R47.htm IDEA: XBRL DOCUMENT v3.19.1
Investment in Real Estate - Summary of Real Estate Held for Investment (Details) - USD ($)
$ in Thousands
Mar. 31, 2019
Dec. 31, 2018
Real Estate [Abstract]    
Land $ 1,313,411 $ 1,372,872
Building and improvements 4,941,701 4,991,770
Tenant improvements 547,427 510,217
Furniture and fixtures 9,451 9,320
Property under development 178,430 175,358
Investment in real estate, at cost $ 6,990,420 $ 7,059,537