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
Mar. 31, 2022
Dec. 31, 2021
Debt Instrument [Line Items]    
Carrying value $ 194,898 $ 193,380
Fair value 252,706 242,104
Unsecured Debentures    
Debt Instrument [Line Items]    
Carrying value 57,744 57,171
Fair value 67,566 64,596
Secured Notes    
Debt Instrument [Line Items]    
Carrying value 135,862 134,902
Fair value 184,119 176,487
Other Long Term Debt    
Debt Instrument [Line Items]    
Carrying value 1,292 1,307
Fair value $ 1,021 $ 1,021