Condensed Consolidated Balance Sheets (Unaudited) (Parenthetical) - USD ($) shares in Thousands, $ in Thousands	Jul. 31, 2025	Apr. 30, 2025
Statement of Financial Position [Abstract]
Trade accounts and notes receivable, allowances	$ 13,333	$ 12,947
Less: accumulated depreciation	$ 383,375	$ 369,343
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	500,000	500,000
Common stock, shares issued (in shares)	38,068	38,164
Common stock, shares outstanding (in shares)	38,068	38,164
Preferred stock, par value (in dollars per share)	$ 0.01	$ 0.01
Preferred stock, shares authorized (in shares)	50,000	50,000
Preferred stock, shares issued (in shares)	0	0
Preferred stock, shares outstanding (in shares)	0	0