Segment Information - Revenue (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Segment revenue information
Rental (including reimbursable)	$ 799,565	$ 439,365
Other	7,778	2,889
Total revenue	807,343	442,254
Automotive service
Segment revenue information
Rental (including reimbursable)	20,395	9,918
Beverages
Segment revenue information
Rental (including reimbursable)	9,535	8,952
Convenience stores - U.S.
Segment revenue information
Rental (including reimbursable)	65,943	50,128
Dollar stores
Segment revenue information
Rental (including reimbursable)	54,114	32,506
Drug stores
Segment revenue information
Rental (including reimbursable)	47,699	35,048
Financial services
Segment revenue information
Rental (including reimbursable)	13,834	7,718
General merchandise - U.S.
Segment revenue information
Rental (including reimbursable)	26,288	15,234
Grocery stores - U.S.
Segment revenue information
Rental (including reimbursable)	36,267	19,681
Grocery stores - U.K.
Segment revenue information
Rental (including reimbursable)	34,147	20,858
Health and fitness
Segment revenue information
Rental (including reimbursable)	35,810	28,610
Health care - U.S.
Segment revenue information
Rental (including reimbursable)	13,749	6,522
Home furnishings - U.S.
Segment revenue information
Rental (including reimbursable)	17,180	2,956
Home improvement - U.S.
Segment revenue information
Rental (including reimbursable)	22,086	13,038
Home improvement - U.K.
Segment revenue information
Rental (including reimbursable)	15,748	4,478
Restaurants-casual dining
Segment revenue information
Rental (including reimbursable)	47,510	11,748
Restaurants-quick service - U.S.
Segment revenue information
Rental (including reimbursable)	55,524	23,465
Theaters - U.S.
Segment revenue information
Rental (including reimbursable)	34,173	19,656
Transportation services
Segment revenue information
Rental (including reimbursable)	24,251	16,432
Wholesale club
Segment revenue information
Rental (including reimbursable)	18,663	9,941
Other non-reportable segments and tenant reimbursements
Segment revenue information
Rental (including reimbursable)	$ 206,649	$ 102,476