Equity Method Investments - Equity Method Investments Excluding the Managed Programs (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Investments in Programs
Equity Investments in Real Estate	$ 356,637	$ 283,446
Real Estate
Investments in Programs
Equity Investments in Real Estate	291,903	226,889
Real Estate | Third Party | Retail Complex In Las Vegas, Nevada
Investments in Programs
Equity Investments in Real Estate	$ 104,114	0
Real Estate | Third Party | Johnson Self Storage
Investments in Programs
Equity method investment, ownership percentage (percent)	90.00%
Equity Investments in Real Estate	$ 67,573	68,979
Real Estate | Third Party | Kesko Senukai
Investments in Programs
Equity method investment, ownership percentage (percent)	70.00%
Equity Investments in Real Estate	$ 41,955	46,443
Real Estate | Third Party | Harmon Retail Corner
Investments in Programs
Equity method investment, ownership percentage (percent)	15.00%
Equity Investments in Real Estate	$ 24,435	23,815
Real Estate | WLT | WLT | Affiliated Entity
Investments in Programs
Equity method investment, ownership percentage (percent)	5.00%
Equity Investments in Real Estate	$ 33,392	44,182
Real Estate | CPA:18 – Global | State Farm Mutual Automobile Insurance Co. (e) | Affiliated Entity
Investments in Programs
Equity method investment, ownership percentage (percent)	50.00%
Equity Investments in Real Estate	$ 7,129	15,475
Real Estate | CPA:18 – Global | Apply Sørco AS | Affiliated Entity
Investments in Programs
Equity method investment, ownership percentage (percent)	49.00%
Equity Investments in Real Estate	$ 5,909	7,156
Real Estate | CPA:18 – Global | Bank Pekao | Affiliated Entity
Investments in Programs
Equity method investment, ownership percentage (percent)	50.00%
Equity Investments in Real Estate	$ 4,460	17,850
Real Estate | CPA:18 – Global | Fortenova Grupa d.d. (formerly Konzum d.d.) | Affiliated Entity
Investments in Programs
Equity method investment, ownership percentage (percent)	20.00%
Equity Investments in Real Estate	$ 2,936	$ 2,989