Investment in Real Estate Quantitative Information About Level 3 Fair Value Measurements (Details) $ in Thousands	Jun. 30, 2018 USD ($) Property
Unobservable Inputs (Level 3) \| ContractedPrice
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value of Industrial Property \| $	$ 1,889
Impairment Activity
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Number of Land Parcels \| Property	1

This element represents the aggregate of the assets reported on the balance sheet at period end measured at fair value on a nonrecurring basis by the entity. This element is intended to be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements.

No definition available.

Name:	us-gaap_AssetsFairValueDisclosureNonrecurring
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant