Investments in Real Estate - Acquisitions (Details) ft² in Thousands, $ in Thousands	6 Months Ended
	Jun. 30, 2022 USD ($) ft² property	Jun. 30, 2021 USD ($) ft² property
Real Estate [Line Items]
Number of properties | property	423	254
Leasable square feet (sq ft) | ft²	13,663	9,634
Investment	$ 3,231,100	$ 2,161,900
Weighted average lease term (years)	11 years 10 months 24 days	12 years
Initial weighted average cash lease yield (percent)	5.70%	5.50%
Settlement credits as reimbursement for acquired rent free period	$ 6,800	$ 850
Rental revenue generated from acquisitions from investment grade tenants (as a percent)	33.00%	47.00%
Retail
Real Estate [Line Items]
Property type acquired based on rental revenue (as a percent)	87.40%	75.80%
Industrial
Real Estate [Line Items]
Property type acquired based on rental revenue (as a percent)	12.60%	24.20%
New properties
Real Estate [Line Items]
Number of properties, new | property	340	214
Leasable square feet (sq ft) | ft²	10,942	7,618
Investment	$ 2,963,200	$ 2,047,100
Weighted average lease term (years)	11 years 6 months	11 years 9 months 18 days
Initial weighted average cash lease yield (percent)	5.70%	5.50%
New properties | U.S.
Real Estate [Line Items]
Number of properties, new | property	289	173
Leasable square feet (sq ft) | ft²	5,551	4,485
Investment	$ 1,492,000	$ 1,052,300
Weighted average lease term (years)	13 years 10 months 24 days	13 years 8 months 12 days
Initial weighted average cash lease yield (percent)	5.70%	5.50%
New properties | Europe (UK)
Real Estate [Line Items]
Number of properties, new | property	51	41
Leasable square feet (sq ft) | ft²	5,391	3,133
Investment	$ 1,471,200	$ 994,800
Weighted average lease term (years)	9 years	9 years 9 months 18 days
Initial weighted average cash lease yield (percent)	5.60%	5.60%
Properties under development
Real Estate [Line Items]
Number of properties, under development | property	83	40
Leasable square feet (sq ft) | ft²	2,721	2,016
Investment	$ 267,900	$ 114,800
Weighted average lease term (years)	15 years 10 months 24 days	15 years 7 months 6 days
Initial weighted average cash lease yield (percent)	5.70%	5.70%