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Fair Value Disclosures - Summary of Carrying Amount and Fair Value of Fixed and Floating Rate Debt (Detail) - Level 3 - USD ($)
$ in Thousands
Mar. 31, 2021
Dec. 31, 2020
Fair Value, Option, Quantitative Disclosures [Line Items]    
Carrying amount $ 5,596 $ 5,505
Fair value $ 5,579 $ 5,485