Segment Reporting - Geographic Information for Revenue from Tenants and Investments in Real Estate (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024	Dec. 31, 2024
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue from tenants	$ 121,013	$ 138,666	$ 378,333	$ 432,010
Investments in real estate, gross:	5,193,817		5,193,817		$ 5,621,942
Real Estate Investing
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue from tenants	121,013	138,666	378,333	432,010
Investments in real estate, gross:	5,193,817		5,193,817		5,621,942
Acquired Intangible Liabilities, Gross	37,649		37,649		46,950
United States | Real Estate Investing
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue from tenants	84,765	100,689	263,999	320,108
Investments in real estate, gross:	3,766,389		3,766,389		4,231,893
Acquired Intangible Liabilities, Gross	19,441		19,441		30,983
United Kingdom | Real Estate Investing
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue from tenants	18,777	21,499	62,867	63,527
Investments in real estate, gross:	803,267		803,267		799,624
Acquired Intangible Liabilities, Gross	5,887		5,887		5,279
Europe | Real Estate Investing
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue from tenants	16,681	15,681	49,132	45,976
Investments in real estate, gross:	586,684		586,684		554,133
Acquired Intangible Liabilities, Gross	12,301		12,301		10,669
Canada | Real Estate Investing
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue from tenants	790	$ 797	2,335	$ 2,399
Investments in real estate, gross:	37,477		37,477		36,292
Acquired Intangible Liabilities, Gross	$ 20		$ 20		$ 19