CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY - USD ($) $ in Thousands	Total	Common Stock	Additional paid-in capital	Retained earnings	Accumulated other comprehensive income (loss)	Treasury Stock	Stockholders' equity attributable to THOR	Non-controlling interests
Beginning balance (in shares) at Jul. 31, 2021		65,651,570				10,285,329
Beginning balance at Jul. 31, 2021	$ 2,948,106	$ 6,565	$ 460,482	$ 2,770,401	$ 44,621	$ (360,226)	$ 2,921,843	$ 26,263
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	510,438			508,810			508,810	1,628
Purchase of treasury shares (in shares)						590,961
Purchases of treasury shares	(58,331)					$ (58,331)	(58,331)
Restricted stock unit activity (in shares)		407,833				152,869
Restricted stock unit activity	(11,492)	$ 41	6,478			$ (18,011)	(11,492)
Dividends per common share	(47,833)			(47,833)			(47,833)
Stock-based compensation expense	12,986		12,986				12,986
Other comprehensive income (loss)	(101,029)				(100,324)		(100,324)	(705)
Acquisitions	739							739
Ending balance (in shares) at Jan. 31, 2022		66,059,403				11,029,159
Ending balance at Jan. 31, 2022	3,253,584	$ 6,606	479,946	3,231,378	(55,703)	$ (436,568)	3,225,659	27,925
Beginning balance (in shares) at Oct. 31, 2021		66,058,290				10,438,198
Beginning balance at Oct. 31, 2021	3,132,242	$ 6,606	473,775	2,988,726	11,969	$ (378,237)	3,102,839	29,403
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	265,635			266,568			266,568	(933)
Purchase of treasury shares (in shares)						590,961
Purchases of treasury shares	(58,331)					$ (58,331)	(58,331)
Restricted stock unit activity (in shares)		1,113
Restricted stock unit activity	(788)		(788)				(788)
Dividends per common share	(23,916)			(23,916)			(23,916)
Stock-based compensation expense	6,959		6,959				6,959
Other comprehensive income (loss)	(68,217)				(67,672)		(67,672)	(545)
Ending balance (in shares) at Jan. 31, 2022		66,059,403				11,029,159
Ending balance at Jan. 31, 2022	3,253,584	$ 6,606	479,946	3,231,378	(55,703)	$ (436,568)	3,225,659	27,925
Beginning balance (in shares) at Jul. 31, 2022		66,059,403				12,382,441
Beginning balance at Jul. 31, 2022	3,600,654	$ 6,606	497,946	3,813,261	(181,607)	$ (543,344)	3,592,862	7,792
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	$ 163,229			163,265			163,265	(36)
Purchase of treasury shares (in shares)	338,733					338,733
Purchases of treasury shares	$ (25,407)					$ (25,407)	(25,407)
Restricted stock unit activity (in shares)		274,669				93,925
Restricted stock unit activity	(4,268)	$ 27	2,629			$ (6,924)	(4,268)
Dividends per common share	(48,165)			(48,165)			(48,165)
Stock-based compensation expense	16,935		16,935				16,935
Other comprehensive income (loss)	85,152				85,561		85,561	(409)
Ending balance (in shares) at Jan. 31, 2023		66,334,072				12,815,099
Ending balance at Jan. 31, 2023	3,788,130	$ 6,633	517,510	3,928,361	(96,046)	$ (575,675)	3,780,783	7,347
Beginning balance (in shares) at Oct. 31, 2022		66,326,135				12,813,019
Beginning balance at Oct. 31, 2022	3,650,959	$ 6,633	509,579	3,925,365	(223,698)	$ (575,516)	3,642,363	8,596
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	$ 25,806			27,080			27,080	(1,274)
Purchase of treasury shares (in shares)	0
Restricted stock unit activity (in shares)		7,937				2,080
Restricted stock unit activity	$ (771)		(612)			$ (159)	(771)
Dividends per common share	(24,084)			(24,084)			(24,084)
Stock-based compensation expense	8,543		8,543				8,543
Other comprehensive income (loss)	127,677				127,652		127,652	25
Ending balance (in shares) at Jan. 31, 2023		66,334,072				12,815,099
Ending balance at Jan. 31, 2023	$ 3,788,130	$ 6,633	$ 517,510	$ 3,928,361	$ (96,046)	$ (575,675)	$ 3,780,783	$ 7,347