Condensed Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	May 31, 2025	Aug. 31, 2024	May 31, 2024
Statement of Financial Position [Abstract]
Receivables, allowance	$ 6,326	$ 5,151	$ 5,082
Preferred stock, par value	$ 1	$ 1	$ 1
Preferred stock, authorized	2,000,000	2,000,000	2,000,000
Preferred stock, issued	0	0	0
Preferred stock, outstanding	0	0	0
Common stock, par value	$ 1	$ 1	$ 1
Common stock, authorized	25,000,000	25,000,000	25,000,000
Common stock, issued	19,162,000	19,124,000	19,123,000
Treasury stock, shares	8,300,000	8,277,000	8,237,000