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, 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
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
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
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
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
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 Jul. 31, 2023		66,344,340
Beginning balance at Jul. 31, 2023	$ 3,983,398	$ 6,634	539,032	4,091,563	(68,547)	$ (592,667)	3,976,015	7,383
Beginning balance (in shares) at Jul. 31, 2023	13,030,030					13,030,030
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	$ 173,936			175,293			175,293	(1,357)
Purchase of treasury shares (in shares)	454,630					454,630
Purchases of treasury shares	$ (43,034)					$ (43,034)	(43,034)
Restricted stock unit activity (in shares)		515,398				177,287
Restricted stock unit activity	(15,369)	$ 52	824			$ (16,245)	(15,369)
Dividends per common share	(76,730)			(76,730)			(76,730)
Stock-based compensation expense	29,049		29,049				29,049
Other comprehensive income (loss)	$ (42,903)				(41,994)		(41,994)	(909)
Ending balance (in shares) at Apr. 30, 2024	13,661,947					13,661,947
Ending balance (in shares) at Apr. 30, 2024		66,859,738
Ending balance at Apr. 30, 2024	$ 4,008,347	$ 6,686	568,905	4,190,126	(110,541)	$ (651,946)	4,003,230	5,117
Beginning balance (in shares) at Jan. 31, 2024		66,859,738
Beginning balance at Jan. 31, 2024	3,942,595	$ 6,686	560,365	4,101,210	(92,894)	$ (638,949)	3,936,418	6,177
Beginning balance (in shares) at Jan. 31, 2024						13,535,193
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	$ 113,577			114,511			114,511	(934)
Purchase of treasury shares (in shares)	126,754					126,754
Purchases of treasury shares	$ (12,997)					$ (12,997)	(12,997)
Restricted stock unit activity	(811)		(811)				(811)
Dividends per common share	(25,595)			(25,595)			(25,595)
Stock-based compensation expense	9,351		9,351				9,351
Other comprehensive income (loss)	$ (17,773)				(17,647)		(17,647)	(126)
Ending balance (in shares) at Apr. 30, 2024	13,661,947					13,661,947
Ending balance (in shares) at Apr. 30, 2024		66,859,738
Ending balance at Apr. 30, 2024	$ 4,008,347	$ 6,686	$ 568,905	$ 4,190,126	$ (110,541)	$ (651,946)	$ 4,003,230	$ 5,117