Business and Organization - Additional Information (Detail)  | 
Sep. 30, 2020  | 
Dec. 31, 2019  | 
|---|---|---|
| OP Unit Holder | ||
| Organization, Consolidation and Presentation of Financial Statements Disclosure [Line Items] | ||
| Company's ownership percent (as percent) | 100.00% | 98.60% | 
| X | ||||||||||
- Definition Organization consolidation and presentation of financial statements disclosure. No definition available. 
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| X | ||||||||||
- Definition The parent entity's interest in net assets of the subsidiary, expressed as a percentage. No definition available. 
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| X | ||||||||||
- Details 
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