Equity Method Investments - Equity Method Investments Excluding the Managed Programs (Details) - USD ($) $ in Thousands	Jun. 30, 2023	Dec. 31, 2022
Equity Method Investment
Equity method investments in real estate	$ 340,285	$ 327,502
Real Estate | Affiliated Entity
Equity Method Investment
Equity method investments in real estate	338,477	325,277
Real Estate | Third Party | Las Vegas Retail Complex | Affiliated Entity
Equity Method Investment
Equity method investments in real estate	$ 220,088	196,352
Real Estate | Third Party | Johnson Self Storage | Affiliated Entity
Equity Method Investment
Equity method investment, ownership (as a percent)	90.00%
Equity method investments in real estate	$ 64,786	65,707
Real Estate | Third Party | Kesko Senukai | Affiliated Entity
Equity Method Investment
Equity method investment, ownership (as a percent)	70.00%
Equity method investments in real estate	$ 29,353	38,569
Real Estate | Third Party | Harmon Retail Corner | Affiliated Entity
Equity Method Investment
Equity method investment, ownership (as a percent)	15.00%
Equity method investments in real estate	$ 24,250	$ 24,649