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
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
Beginning balance (in shares) at Jul. 31, 2021						10,285,329
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	856,456			856,861			856,861	(405)
Purchase of treasury shares (in shares)						1,090,067
Purchases of treasury shares	(98,321)					$ (98,321)	(98,321)
Restricted stock unit activity (in shares)		407,833				152,869
Restricted stock unit activity	(12,018)	$ 41	5,952			$ (18,011)	(12,018)
Dividends per common share	(71,496)			(71,496)			(71,496)
Stock-based compensation expense	22,736		22,736				22,736
Other comprehensive income (loss)	(188,319)				(187,230)		(187,230)	(1,089)
Acquisitions	(15,406)		1,516				1,516	(16,922)
Dividend paid to non-controlling interest	(555)							(555)
Ending balance (in shares) at Apr. 30, 2022						11,528,265
Ending balance (in shares) at Apr. 30, 2022		66,059,403
Ending balance at Apr. 30, 2022	3,441,183	$ 6,606	490,686	3,555,766	(142,609)	$ (476,558)	3,433,891	7,292
Beginning balance (in shares) at Jan. 31, 2022		66,059,403
Beginning 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 Jan. 31, 2022						11,029,159
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	346,018			348,051			348,051	(2,033)
Purchase of treasury shares (in shares)						499,106
Purchases of treasury shares	(39,990)					$ (39,990)	(39,990)
Restricted stock unit activity	(526)		(526)				(526)
Dividends per common share	(23,663)			(23,663)			(23,663)
Stock-based compensation expense	9,750		9,750				9,750
Other comprehensive income (loss)	(87,290)				(86,906)		(86,906)	(384)
Acquisitions	(16,145)		1,516				1,516	(17,661)
Dividend paid to non-controlling interest	(555)							(555)
Ending balance (in shares) at Apr. 30, 2022						11,528,265
Ending balance (in shares) at Apr. 30, 2022		66,059,403
Ending balance at Apr. 30, 2022	3,441,183	$ 6,606	490,686	3,555,766	(142,609)	$ (476,558)	3,433,891	7,292
Beginning balance (in shares) at Jul. 31, 2022		66,059,403
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
Beginning balance (in shares) at Jul. 31, 2022	12,382,441					12,382,441
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	$ 282,958			283,984			283,984	(1,026)
Purchase of treasury shares (in shares)	549,532					549,532
Purchases of treasury shares	$ (42,007)					$ (42,007)	(42,007)
Restricted stock unit activity (in shares)		274,669				93,925
Restricted stock unit activity	(4,250)	$ 27	2,647			$ (6,924)	(4,250)
Dividends per common share	(71,978)			(71,978)			(71,978)
Stock-based compensation expense	26,607		26,607				26,607
Other comprehensive income (loss)	$ 106,292				106,679		106,679	(387)
Ending balance (in shares) at Apr. 30, 2023	13,025,898					13,025,898
Ending balance (in shares) at Apr. 30, 2023		66,334,072
Ending balance at Apr. 30, 2023	$ 3,898,276	$ 6,633	527,200	4,025,267	(74,928)	$ (592,275)	3,891,897	6,379
Beginning balance (in shares) at Jan. 31, 2023		66,334,072
Beginning 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 Jan. 31, 2023						12,815,099
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	$ 119,729			120,719			120,719	(990)
Purchase of treasury shares (in shares)	210,799					210,799
Purchases of treasury shares	$ (16,600)					$ (16,600)	(16,600)
Restricted stock unit activity	18		18				18
Dividends per common share	(23,813)			(23,813)			(23,813)
Stock-based compensation expense	9,672		9,672				9,672
Other comprehensive income (loss)	$ 21,140				21,118		21,118	22
Ending balance (in shares) at Apr. 30, 2023	13,025,898					13,025,898
Ending balance (in shares) at Apr. 30, 2023		66,334,072
Ending balance at Apr. 30, 2023	$ 3,898,276	$ 6,633	$ 527,200	$ 4,025,267	$ (74,928)	$ (592,275)	$ 3,891,897	$ 6,379