CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($) $ in Thousands	Total	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Retained Earnings [Member] Class A Nonvoting Common Stock	Retained Earnings [Member] Class B Voting Common Stock	Treasury Stock, Common	Accumulated Other Comprehensive Income (Loss) [Member]
Equity, Beginning Balances at Jul. 31, 2022		$ 548	$ 345,266	$ 892,417			$ (217,856)	$ (109,077)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	$ 174,857
Other Comprehensive Income (Loss), Net of Tax	16,016							16,016
Issuance of shares of Class A Common Stock under stock plan			(1,069)				(3,119)
Tax benefit and withholdings from deferred compensation distributions			66
Stock-based compensation expense (Note 7)			7,508
Repurchase of shares of Class A Common Stock, including excise taxes							75,472
Dividends, Common Stock, Cash					$ (42,207)	$ (3,197)
Equity, Ending Balances at Jul. 31, 2023		548	351,771	1,021,870			(290,209)	(93,061)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	197,215
Other Comprehensive Income (Loss), Net of Tax	(16,561)							(16,561)
Issuance of shares of Class A Common Stock under stock plan			(5,627)				(11,016)
Tax benefit and withholdings from deferred compensation distributions			149
Stock-based compensation expense (Note 7)			7,361
Repurchase of shares of Class A Common Stock, including excise taxes							72,754
Dividends, Common Stock, Cash					(41,793)	(3,267)
Equity, Ending Balances at Jul. 31, 2024	1,066,658	548	353,654	1,174,025			(351,947)	(109,622)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	189,256
Other Comprehensive Income (Loss), Net of Tax	17,463							17,463
Issuance of shares of Class A Common Stock under stock plan			(6,457)				(9,945)
Tax benefit and withholdings from deferred compensation distributions			190
Stock-based compensation expense (Note 7)			11,882
Repurchase of shares of Class A Common Stock, including excise taxes							(51,184)
Dividends, Common Stock, Cash					$ (42,204)	$ (3,338)
Equity, Ending Balances at Jul. 31, 2025	$ 1,192,211	$ 548	$ 359,269	$ 1,317,739			$ (393,186)	$ (92,159)