Quarterly report pursuant to Section 13 or 15(d)

Financial Instruments - Summary of Companys Long Term Debt Instruments at their Carrying Value and Fair Value (Detail)

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Financial Instruments - Summary of Companys Long Term Debt Instruments at their Carrying Value and Fair Value (Detail) - USD ($)
$ in Thousands
Sep. 30, 2022
Dec. 31, 2021
Debt Instrument [Line Items]    
Carrying value $ 143,000 $ 193,380
Fair value 138,650 242,104
June Unsecured Debentures    
Debt Instrument [Line Items]    
Carrying value 15,530 57,171
Fair value 15,422 64,596
June Secured Debentures    
Debt Instrument [Line Items]    
Carrying value 113,020 134,902
Fair value 109,008 176,487
Secured Notes    
Debt Instrument [Line Items]    
Carrying value 13,490  
Fair value 13,347  
Other    
Debt Instrument [Line Items]    
Carrying value 960 1,307
Fair value $ 873 $ 1,021