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Mortgage Notes Payable, Net - Multi-Tenant Mortgage Loan II (Details) € in Millions, £ in Millions, $ in Millions		1 Months Ended	3 Months Ended		9 Months Ended
	Jan. 26, 2018 USD ($) ft² sate property	Jan. 31, 2018 EUR (€)	Sep. 30, 2018 USD ($) ft²	Dec. 31, 2017 GBP (£)	Sep. 30, 2018 USD ($) ft²
Debt Instrument [Line Items]
Area of property (sqft) | ft²			26,200,000		26,200,000
Revolving Credit Facility
Debt Instrument [Line Items]
Repayments of outstanding indebtedness | $	$ 30.0
Mortgage notes payable
Debt Instrument [Line Items]
Repayments of outstanding indebtedness		€ 0.1	$ 3.0	£ 0.8	$ 1.7
Mortgage notes payable | Multi-tenant mortgage loan
Debt Instrument [Line Items]
Gross proceeds from credit facility | $	$ 32.8
Stated interest rate	4.32%
Term of debt	10 years
Number of mortgaged properties (property) | property	8
Number of states in which mortgaged properties are located (state) | sate	6
Area of property (sqft) | ft²	627,500

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Area of a real estate property.

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- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
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The cash inflow from a contractual arrangement with the lender, including letter of credit, standby letter of credit and revolving credit arrangements, under which borrowings can be made up to a specific amount at any point in time with maturities due beyond one year or the operating cycle, if longer.

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
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The cash outflow during the period from the repayment of aggregate short-term and long-term debt. Excludes payment of capital lease obligations.

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
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-Paragraph 15
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