Land, Buildings and Improvements and Assets Held for Sale - Acquisition of Real Estate (Details) $ in Thousands													6 Months Ended
	Jun. 10, 2021 USD ($) property	Jun. 09, 2021 USD ($) property	Jun. 07, 2021 USD ($) property	May 13, 2021 USD ($) property	May 12, 2021 USD ($) property	May 05, 2021 USD ($) property	May 04, 2021 USD ($) property	Apr. 27, 2021 USD ($) property	Apr. 14, 2021 USD ($) property	Apr. 01, 2021 USD ($) property	Feb. 11, 2021 USD ($) property	Feb. 02, 2021 USD ($) property	Jun. 30, 2021 USD ($) property	Jun. 30, 2020 USD ($)
Property, Plant and Equipment
Total Capitalized Costs													$ 837,003	$ 265,829
Operating Lease
Property, Plant and Equipment
Number of properties (property) | property													31
Total Capitalized Costs													$ 837,136
Operating Lease | Land
Property, Plant and Equipment
Total Capitalized Costs													124,865
Operating Lease | Building
Property, Plant and Equipment
Total Capitalized Costs													608,242
Operating Lease | Below-market rent
Property, Plant and Equipment
Total Capitalized Costs													$ 9,995
Finite lived intangible assets useful life (in years)													11 years 1 month 6 days
Operating Lease | Prepaid rent liability
Property, Plant and Equipment
Total Capitalized Costs													$ 15,445
Operating Lease | Right t of use liability
Property, Plant and Equipment
Total Capitalized Costs													5,979
Operating Lease | In-place lease
Property, Plant and Equipment
Total Capitalized Costs													$ 133,624
Finite lived intangible assets useful life (in years)													22 years 3 months 18 days
Operating Lease | Land lease right-of-use asset | Land
Property, Plant and Equipment
Total Capitalized Costs													$ 1,824
Operating Lease | Grove City, Ohio, and Anderson, South Carolina
Property, Plant and Equipment
Number of properties (property) | property												2
Total Capitalized Costs												$ 19,129
Operating Lease | Various, New Jersey and Pennsylvania
Property, Plant and Equipment
Number of properties (property) | property											10
Total Capitalized Costs											$ 55,115
Operating Lease | Various, New Jersey and Pennsylvania | Retail facility
Property, Plant and Equipment
Number of properties (property) | property											7
Operating Lease | Various, New Jersey and Pennsylvania | Office facility
Property, Plant and Equipment
Number of properties (property) | property											3
Operating Lease | Central Valley, California
Property, Plant and Equipment
Number of properties (property) | property											4
Total Capitalized Costs											$ 75,008
Operating Lease | Central Valley, California | Warehouse facility
Property, Plant and Equipment
Number of properties (property) | property											2
Operating Lease | Central Valley, California | Land
Property, Plant and Equipment
Number of properties (property) | property											2
Operating Lease | Various, France
Property, Plant and Equipment
Number of properties (property) | property										3
Total Capitalized Costs										$ 119,341
Deferred tax liability										$ 8,800
Operating Lease | Searcy, Arkansas
Property, Plant and Equipment
Number of properties (property) | property									1
Total Capitalized Costs									$ 14,038
Operating Lease | Detroit, Michigan
Property, Plant and Equipment
Number of properties (property) | property								1
Total Capitalized Costs								$ 52,810
Operating Lease | Solihull, United Kingdom
Property, Plant and Equipment
Number of properties (property) | property							1
Total Capitalized Costs							$ 194,954
Deferred tax liability							$ 3,600
Operating Lease | New Rochelle, New York
Property, Plant and Equipment
Number of properties (property) | property						1
Total Capitalized Costs						$ 26,109
Operating Lease | Groveport, Ohio
Property, Plant and Equipment
Number of properties (property) | property						1
Total Capitalized Costs						$ 27,133
Operating Lease | Dakota, Illinois
Property, Plant and Equipment
Number of properties (property) | property					1
Total Capitalized Costs					$ 65,043
Operating Lease | San Jose, California
Property, Plant and Equipment
Number of properties (property) | property				1
Total Capitalized Costs				$ 51,949
Operating Lease | Opelika, Alabama
Property, Plant and Equipment
Number of properties (property) | property			1
Total Capitalized Costs			$ 48,897
Operating Lease | Niles and Elk Grove Village, IL; and Guelph, Canada
Property, Plant and Equipment
Number of properties (property) | property		3
Total Capitalized Costs		$ 42,829
Operating Lease | Rome, NY
Property, Plant and Equipment
Number of properties (property) | property	1
Total Capitalized Costs	$ 44,781