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	Treasury Stock	Accumulated Other Comprehensive Loss
Beginning balance at Jul. 31, 2021	$ 963,028			$ 548	$ 339,125	$ 788,369			$ (109,061)	$ (55,953)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	68,861					68,861
Other Comprehensive Income (Loss), Net of Tax	(22,986)									(22,986)
Issuance of shares of Class A Common Stock under stock plan	(4,651)				(4,521)				(130)
Tax benefit and withholdings from deferred compensation distributions	115				115
Stock-based compensation expense	7,170				7,170
Repurchase of shares of Class A Common Stock	(21,720)								(21,720)
Dividends, Common Stock, Cash		$ (21,715)	$ (1,534)				$ (21,715)	$ (1,534)
Ending balance at Jan. 31, 2022	966,568			548	341,889	833,981			(130,911)	(78,939)
Beginning balance at Oct. 31, 2021	963,893			548	340,182	811,820			(127,986)	(60,671)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	33,815					33,815
Other Comprehensive Income (Loss), Net of Tax	(18,268)									(18,268)
Issuance of shares of Class A Common Stock under stock plan	(1,463)				(1,334)				(129)
Stock-based compensation expense	3,041				3,041
Repurchase of shares of Class A Common Stock	(2,796)								(2,796)
Dividends, Common Stock, Cash		(10,857)	(797)				(10,857)	(797)
Ending balance at Jan. 31, 2022	966,568			548	341,889	833,981			(130,911)	(78,939)
Beginning balance at Jul. 31, 2022	911,298			548	345,266	892,417			(217,856)	(109,077)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	77,427					77,427
Other Comprehensive Income (Loss), Net of Tax	13,707									13,707
Issuance of shares of Class A Common Stock under stock plan	(1,179)				(1,200)				2,379
Tax benefit and withholdings from deferred compensation distributions	66				66
Stock-based compensation expense	4,381				4,381
Repurchase of shares of Class A Common Stock	(17,861)								(17,861)
Dividends, Common Stock, Cash		(21,224)	(1,569)				(21,224)	(1,569)
Ending balance at Jan. 31, 2023	967,404			548	348,513	947,051			(233,338)	(95,370)
Beginning balance at Oct. 31, 2022	911,725			548	346,064	920,482			(228,855)	(126,514)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	37,986					37,986
Other Comprehensive Income (Loss), Net of Tax	31,144									31,144
Issuance of shares of Class A Common Stock under stock plan	(2,334)				1,026				1,308
Stock-based compensation expense	1,423				1,423
Repurchase of shares of Class A Common Stock	(5,791)								(5,791)
Dividends, Common Stock, Cash		$ (10,603)	$ (814)				$ (10,603)	$ (814)
Ending balance at Jan. 31, 2023	$ 967,404			$ 548	$ 348,513	$ 947,051			$ (233,338)	$ (95,370)