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Summary of Significant Accounting Policies - Additional Information (Details)	Mar. 31, 2019 a lease	Jul. 31, 2018 a	Mar. 31, 2018 a	Oct. 17, 2017 a
Property, Plant and Equipment [Line Items]
Area of real estate property (in acres)	73,900		63,351
Number of operating ground lease arrangements | lease	2
Ventura County California
Property, Plant and Equipment [Line Items]
Area of real estate property (in acres)		169		169

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- Definition

Area of a real estate property.

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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- Definition

The number of units (items of property) under operating lease arrangements.

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No definition available.

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