CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($) $ in Thousands	Total	Class A Nonvoting Common Stock	Class B Voting Common Stock	Common Stock	Additional Paid-in Capital	Retained Earnings	Retained Earnings Class A Nonvoting Common Stock	Retained Earnings Class B Voting Common Stock	AOCI Attributable to Parent	Treasury Stock, Common
Beginning Balances at Jul. 31, 2022	$ 911,298			$ 548	$ 345,266	$ 892,417			$ (109,077)	$ (217,856)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	39,441					39,441
Other comprehensive loss, net of tax	(17,437)								(17,437)
Issuance of shares of Class A Common Stock under stock plan	1,155				2,226					1,071
Tax benefit and withholdings from deferred compensation distributions	66				66
Repurchase of shares of Class A Common Stock, including excise taxes										(12,070)
Stock-based compensation expense	2,958				2,958
Dividends, Common Stock, Cash		$ 10,621	$ 755				$ 10,621	$ 755
Ending Balances at Oct. 31, 2022	911,725			548	346,064	920,482			(126,514)	(228,855)
Beginning Balances at Jul. 31, 2023	990,919			548	351,771	1,021,870			(93,061)	(290,209)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	47,241
Other comprehensive loss, net of tax	(22,222)								(22,222)
Issuance of shares of Class A Common Stock under stock plan	(265)				3,662					3,927
Tax benefit and withholdings from deferred compensation distributions	149				149
Repurchase of shares of Class A Common Stock, including excise taxes										(14,185)
Stock-based compensation expense	4,163				4,163
Dividends, Common Stock, Cash		$ 10,565	$ 773				$ 10,565	$ 773
Ending Balances at Oct. 31, 2023	$ 994,992			$ 548	$ 352,421	$ 1,057,773			$ (115,283)	$ (300,467)