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Fair Value Disclosures - Summary of Carrying Amount and Fair Value of Fixed and Floating Rate Debt (Detail) - USD ($)
$ in Thousands
Jun. 30, 2020
Dec. 31, 2019
Fair Value, Option, Quantitative Disclosures [Line Items]    
Carrying amount $ 6,151 $ 6,995
Level 3    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Carrying amount 6,151 6,995
Fair value $ 5,717 $ 6,820