v3.26.3
Fair Value Measurements - Schedule of Fair Value Information for Financial Liabilities Carried on Consolidated Balance Sheets (Detail) - USD ($)
$ in Thousands
Sep. 30, 2026
Dec. 31, 2025
Carrying Value [Member]    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Other investments $ 5,000 $ 5,000
Revolving credit facility 36,000 36,000
Total long-term debt 31,255 31,877
Carrying Value [Member] | 5.50% Promissory Note [Member]    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Total long-term debt 11,081 11,262
Carrying Value [Member] | 4.55% Promissory Note [Member]    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Total long-term debt 3,855 4,080
Carrying Value [Member] | 5.65% Promissory Note [Member]    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Total long-term debt 16,319 16,535
Other investments 5,000 5,000
Revolving credit facility 36,000 36,000
Total long-term debt 31,255 31,877
(Level 3) [Member]    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Other investments 5,500 5,223
Estimate of Fair Value Measurement [Member]    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Other investments 5,500 5,223
Revolving credit facility 36,000 36,000
Total long-term debt 29,525 31,791
Estimate of Fair Value Measurement [Member] | (Level 2) [Member]    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Revolving credit facility 36,000 36,000
Total long-term debt   0
Estimate of Fair Value Measurement [Member] | (Level 3) [Member]    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Total long-term debt 29,525 31,791
Estimate of Fair Value Measurement [Member] | 5.50% Promissory Note [Member]    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Total long-term debt 10,556 11,313
Estimate of Fair Value Measurement [Member] | 5.50% Promissory Note [Member] | (Level 2) [Member]    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Total long-term debt   0
Estimate of Fair Value Measurement [Member] | 5.50% Promissory Note [Member] | (Level 3) [Member]    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Total long-term debt 10,556 11,313
Estimate of Fair Value Measurement [Member] | 4.55% Promissory Note [Member]    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Total long-term debt 3,513 3,863
Estimate of Fair Value Measurement [Member] | 4.55% Promissory Note [Member] | (Level 2) [Member]    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Total long-term debt   0
Estimate of Fair Value Measurement [Member] | 4.55% Promissory Note [Member] | (Level 3) [Member]    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Total long-term debt 3,513 3,863
Estimate of Fair Value Measurement [Member] | 5.65% Promissory Note [Member]    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Total long-term debt 15,456 16,615
Estimate of Fair Value Measurement [Member] | 5.65% Promissory Note [Member] | (Level 3) [Member]    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Total long-term debt $ 15,456 $ 16,615