Debt - Debt (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024
Debt Instrument [Line Items]
Total debt	$ 626,710	$ 625,439
Less current maturities	285,735	292,807
Long-term debt, less current maturities (Note 6)	340,975	332,632
Revolving credit facility and term loan borrowing [Member]
Debt Instrument [Line Items]
Short-term debt	$ 302,700	$ 313,700
Minimum [Member] | Revolving credit facility and term loan borrowing [Member]
Debt Instrument [Line Items]
Maturity Dates	2026	2026
Maximum [Member] | Revolving credit facility and term loan borrowing [Member]
Debt Instrument [Line Items]
Maturity Dates	2027	2027
Unsecured private placement 3.95% note [Member]
Debt Instrument [Line Items]
Total debt	$ 28,515	$ 42,759
Debt instrument interest rate percentage	3.95%	3.95%
Unsecured private placement 3.95% note [Member] | Minimum [Member]
Debt Instrument [Line Items]
Maturity Dates	2026	2026
Unsecured private placement 3.95% note [Member] | Maximum [Member]
Debt Instrument [Line Items]
Maturity Dates	2027	2027
Unsecured private placement 3.86% note [Member]
Debt Instrument [Line Items]
Total debt		$ 14,270
Debt instrument interest rate percentage	3.86%	3.86%
Maturity Dates	2025	2025
Unsecured private placement 2.30% note [Member]
Debt Instrument [Line Items]
Total debt	$ 29,945	$ 39,923
Debt instrument interest rate percentage	2.30%	2.30%
Unsecured private placement 2.30% note [Member] | Minimum [Member]
Debt Instrument [Line Items]
Maturity Dates	2026	2026
Unsecured private placement 2.30% note [Member] | Maximum [Member]
Debt Instrument [Line Items]
Maturity Dates	2028	2028
Unsecured private placement 2.37% note [Member]
Debt Instrument [Line Items]
Total debt	$ 29,940	$ 39,917
Debt instrument interest rate percentage	2.37%	2.37%
Unsecured private placement 2.37% note [Member] | Minimum [Member]
Debt Instrument [Line Items]
Maturity Dates	2026	2026
Unsecured private placement 2.37% note [Member] | Maximum [Member]
Debt Instrument [Line Items]
Maturity Dates	2028	2028
Unsecured private placement 2.73% note [Member]
Debt Instrument [Line Items]
Total debt	$ 85,662	$ 99,930
Debt instrument interest rate percentage	2.73%	2.73%
Unsecured private placement 2.73% note [Member] | Minimum [Member]
Debt Instrument [Line Items]
Maturity Dates	2026	2026
Unsecured private placement 2.73% note [Member] | Maximum [Member]
Debt Instrument [Line Items]
Maturity Dates	2031	2031
Unsecured private placement 2.83% note [Member]
Debt Instrument [Line Items]
Total debt	$ 74,948	$ 74,940
Debt instrument interest rate percentage	2.83%	2.83%
Unsecured private placement 2.83% note [Member] | Minimum [Member]
Debt Instrument [Line Items]
Maturity Dates	2026	2026
Unsecured private placement 2.83% note [Member] | Maximum [Member]
Debt Instrument [Line Items]
Maturity Dates	2032	2032
Unsecured private placement 6.17% note [Member]
Debt Instrument [Line Items]
Total debt	$ 75,000
Debt instrument interest rate percentage	6.17%	6.17%
Unsecured private placement 6.17% note [Member] | Minimum [Member]
Debt Instrument [Line Items]
Maturity Dates	2029	2029
Unsecured private placement 6.17% note [Member] | Maximum [Member]
Debt Instrument [Line Items]
Maturity Dates	2033	2033