Investment in Real Estate - Additional Information (Details) $ in Thousands, ft² in Millions	3 Months Ended
Mar. 31, 2019 USD ($) ft² Property
Real Estate Properties [Line Items]
Number of industrial properties	458
Gross leasable area (GLA) of industrial properties \| ft²	63.2
Acquisition Activity
Real Estate Properties [Line Items]
Number of industrial properties	1
Gross leasable area (GLA) of industrial properties \| ft²	0.2
Number of Land Parcels	2
Disposition Activity
Real Estate Properties [Line Items]
Number of industrial properties	1
Gross leasable area (GLA) of industrial properties \| ft²	0.1
Proceeds from sale of industrial properties \| $	$ 10,467
Gain on sale of real estate \| $	$ 208

The difference between the carrying value and the sale price of real estate or properties that were intended to be sold or held for capital appreciation or rental income. This element refers to the gain (loss) included in earnings and not to the cash proceeds of the sale. This element is a noncash adjustment to net income when calculating net cash generated by operating activities using the indirect method.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 360
-SubTopic 10
-Section 50
-Paragraph 3
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=109226691&loc=d3e2941-110230

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3602-108585

Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 360
-SubTopic 10
-Section 45
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=109226348&loc=d3e2443-110228

Name:	us-gaap_GainLossOnSaleOfProperties
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration