Segment Reporting - Segment Assets (Details) - USD ($) $ in Thousands		Dec. 31, 2019	Dec. 31, 2018
Assets
Equity investments in real estate		$ 324,004	$ 329,248
Total assets	[1]	14,060,918	14,183,039
Real Estate
Assets
Long-lived assets		11,916,745	11,928,854
Equity investments in real estate		194,437	221,658
Total assets		13,811,403	13,941,963
Real Estate | Domestic
Assets
Long-lived assets		7,574,110	7,579,018
Equity investments in real estate		110,822	129,799
Real Estate | International
Assets
Long-lived assets		4,342,635	4,349,836
Equity investments in real estate		83,615	91,859
Investment Management
Assets
Total assets		$ 249,515	$ 241,076

[1] See Note 2 for details related to variable interest entities (“VIEs”).