Variable Interest Entities - Summarized Balance Sheet (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Assets:
Net Investment in Real Estate	$ 3,222,698	$ 3,025,429
Total Assets	3,651,884	3,518,828
Liabilities and Partners' Capital:
Mortgage Loans Payable, Net	156,343	173,685
Total Liabilities and Equity/Partners' Capital	3,651,884	3,518,828
Other Real Estate Partnerships
Assets:
Net Investment in Real Estate	243,003	240,847
Other Assets, Net	44,589	69,982
Total Assets	287,592	310,829
Liabilities and Partners' Capital:
Mortgage Loans Payable, Net	6,374	11,009
Other Liabilities, Net	20,953	21,088
Partners' Capital	260,265	278,732
Total Liabilities and Equity/Partners' Capital	$ 287,592	$ 310,829