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Investments in Real Estate - Acquisitions Footnotes (Details) $ in Thousands, £ in Millions	6 Months Ended
	Jun. 30, 2021 USD ($) property industry	Jun. 30, 2021 GBP (£) property industry	Jun. 30, 2020 USD ($) industry	Jun. 30, 2020 GBP (£) industry
Real Estate [Line Items]
Settlement credits as reimbursement for acquired rent free period	$ 850
Number of properties related to settlement credits | property	4	4
Acquired properties, percentage leased at the acquisition date (as a percent)	100.00%	100.00%	100.00%	100.00%
Value of properties acquired during the period	$ 2,161,914		$ 640,204
Number of industries in which tenants operate | industry	28	28	17	17
Rental revenue generated from acquisitions from investment grade tenants (as a percent)	47.00%	47.00%	37.00%	37.00%
Retail
Real Estate [Line Items]
Property type acquired based on rental revenue (as a percent)	75.80%	75.80%	96.50%	96.50%
Industrial
Real Estate [Line Items]
Property type acquired based on rental revenue (as a percent)	24.20%	24.20%	3.50%	3.50%
U.K.
Real Estate [Line Items]
Value of properties acquired during the period | £		£ 715.1		£ 180.1

X

- Definition

Represents the portion of real estate properties leased during the period with existing tenant lease agreements in place expressed as a percentage of total area.

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No definition available.

+ Details

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X

- Definition

Represents the number of industries in which tenants of the real estate properties acquired during the period operate.

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No definition available.

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X

- Definition

Represents the percentage of the real estate properties acquired during the period by the type of real estate.

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No definition available.

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X

- Definition

Number Of Properties Acquired With Settlement Credit

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No definition available.

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X

- Definition

Represents the net assets recorded as part of the real estate acquisition.

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No definition available.

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X

- Definition

Rental Revenue Generated From Acquisitions, Investment Grade Tenants, Percentage

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No definition available.

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- Definition

Settlement Credits For Acquired Properties As Reimbursement For Rent Free Period

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No definition available.

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Balance Type:	credit
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X

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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No definition available.

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- Details

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