Subsequent Events - Narrative (Details) - Subsequent Event - Commons at University Place Raleigh-Cary, NC MSA $ in Thousands	Jan. 31, 2019 USD ($) ft²
Subsequent Event [Line Items]
Square Feet \| ft²	92,100
Gross Acquisition Price \| $	$ 23,300

Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event.

No definition available.

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration