Summary of Significant Accounting Policies - Estimated Useful Lives of Assets (Details)	3 Months Ended
Mar. 31, 2019
Land
Property Plant And Equipment [Line Items]
Estimated useful lives of assets	Not depreciated
Buildings
Property Plant And Equipment [Line Items]
Estimated useful lives of assets	30 years
Improvements
Property Plant And Equipment [Line Items]
Estimated useful lives of assets	15 years
Furniture, Fixtures, and Equipment
Property Plant And Equipment [Line Items]
Estimated useful lives of assets	3 years
Intangible Lease Assets
Property Plant And Equipment [Line Items]
Estimated useful lives of assets	6 months

Describes the periods of time over which an entity anticipates to receive utility from its property, plant and equipment (that is, the periods of time over which an entity allocates the initial cost of its property, plant and equipment).

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 360
-SubTopic 10
-Section 35
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=68071081&loc=d3e1205-110223

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section 50
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=84158767&loc=d3e18780-107790

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Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration