Derivative Instruments (Interest Rate Contracts) (Details) - Secured Debt € in Thousands, £ in Thousands, $ in Thousands	12 Months Ended
Dec. 31, 2019 USD ($)	Dec. 31, 2019 GBP (£)	Dec. 31, 2019 EUR (€)
Bishop’s Square \| EURIBOR
Derivative Contract Details
Debt instrument face amount			€ 55,200
Derivative, notional amount			€ 55,200
Interest Rate Received	Euribor
Pay Rate / Strike Rate (percent)	2.00%	2.00%	2.00%
Montrose Student Residences \| EURIBOR
Derivative Contract Details
Debt instrument face amount			€ 22,605
Derivative, notional amount			€ 16,954
Interest Rate Received	Euribor
Pay Rate / Strike Rate (percent)	1.25%	1.25%	1.25%
Queens Court \| LIBOR
Derivative Contract Details
Debt instrument face amount \| £		£ 29,500
Derivative, notional amount \| £		£ 22,125
Interest Rate Received	LIBOR
Pay Rate / Strike Rate (percent)	2.00%	2.00%	2.00%
Venue Museum District \| LIBOR
Derivative Contract Details
Debt instrument face amount \| $	$ 45,000
Derivative, notional amount \| $	$ 45,000
Interest Rate Received	LIBOR
Pay Rate / Strike Rate (percent)	3.50%	3.50%	3.50%
Fresh Park Venlo \| EURIBOR
Derivative Contract Details
Debt instrument face amount			€ 75,000
Derivative, notional amount			€ 52,487
Interest Rate Received	Euribor
Pay Rate / Strike Rate (percent)	2.00%	2.00%	2.00%
Maintal Logistics \| EURIBOR
Derivative Contract Details
Debt instrument face amount			€ 23,500
Derivative, notional amount			€ 16,450
Interest Rate Received	Euribor
Pay Rate / Strike Rate (percent)	2.00%	2.00%	2.00%
ABC Westland \| EURIBOR
Derivative Contract Details
Debt instrument face amount			€ 75,000
Derivative, notional amount			€ 52,500
Interest Rate Received	Euribor
Pay Rate / Strike Rate (percent)	1.00%	1.00%	1.00%
Glasgow West End \| LIBOR
Derivative Contract Details
Debt instrument face amount \| £		£ 43,200
Derivative, notional amount \| £		£ 32,400
Interest Rate Received	LIBOR
Pay Rate / Strike Rate (percent)	2.00%	2.00%	2.00%
Gdansk PL II \| EURIBOR
Derivative Contract Details
Debt instrument face amount			€ 16,800
Derivative, notional amount			€ 16,800
Interest Rate Received	Euribor
Pay Rate / Strike Rate (percent)	(0.36%)	(0.36%)	(0.36%)
Lodz Urban Logistics \| EURIBOR
Derivative Contract Details
Debt instrument face amount			€ 13,600
Derivative, notional amount			€ 13,600
Interest Rate Received	Euribor
Pay Rate / Strike Rate (percent)	(0.36%)	(0.36%)	(0.36%)

The reference rate for the variable rate of the interest rate derivative, such as LIBOR or the US Treasury rate and the maturity of the reference rate used, such as three months or six months LIBOR.

No definition available.

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- Definition

Face (par) amount of debt instrument at time of issuance.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
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-Topic 835
-SubTopic 30
-Section 45
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- Definition

Cap rate on an interest rate derivative such as an interest rate cap or collar. If market rates exceed the cap rate, a payment or receipt is triggered on the contract.

+ References

No definition available.

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- Definition

Nominal or face amount used to calculate payment on derivative.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 1B
-URI http://asc.fasb.org/extlink&oid=109980867&loc=SL5580258-113959

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