Annual report pursuant to Section 13 and 15(d)

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

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Financial Instruments - Summary of Company's Long-Term Debt Instruments at their Carrying Value and Fair Value (Detail) - USD ($)
$ in Thousands
Dec. 31, 2021
Dec. 31, 2020
Debt Instrument [Line Items]    
Carrying value $ 193,380 $ 171,175
Fair value 242,104 189,363
Unsecured Debentures    
Debt Instrument [Line Items]    
Carrying value 57,171 54,905
Fair value 64,596 53,830
Secured Notes    
Debt Instrument [Line Items]    
Carrying value 134,902 115,350
Fair value 176,487 134,609
Other Long Term Debt    
Debt Instrument [Line Items]    
Carrying value 1,307 920
Fair value $ 1,021 $ 924