CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY - USD ($) $ in Thousands	Total	Stockholders' equity attributable to Thor	Common Stock	Additional paid-in capital	Retained earnings	Accumulated other comprehensive income (loss)	Treasury Stock	Non-controlling interests
Beginning balance (in shares) at Jul. 31, 2020			65,396,531				10,197,775
Balance at beginning of period, net of tax at Jul. 31, 2020	$ 2,345,569	$ 2,319,782	$ 6,540	$ 436,828	$ 2,201,330	$ 26,993	$ (351,909)	$ 25,787
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	115,639	113,757			113,757			1,882
Restricted stock unit activity (in shares)			255,039				87,554
Restricted stock unit activity	(8,094)	(8,094)	$ 25	198			$ (8,317)
Dividends per common share	(22,700)	(22,700)			(22,700)
Stock-based compensation expense	5,768	5,768		5,768
Other comprehensive income	(15,661)	(15,774)				(15,774)		113
Ending balance (in shares) at Oct. 31, 2020			65,651,570				10,285,329
Balance at end of period, net of tax at Oct. 31, 2020	2,420,521	2,392,739	$ 6,565	442,794	2,292,387	11,219	$ (360,226)	27,782
Beginning balance (in shares) at Jul. 31, 2021			65,651,570				10,285,329
Balance at beginning of period, net of tax at Jul. 31, 2021	2,948,106	2,921,843	$ 6,565	460,482	2,770,401	44,621	$ (360,226)	26,263
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	244,803	242,242			242,242			2,561
Restricted stock unit activity (in shares)			406,720				152,869
Restricted stock unit activity	(10,704)	(10,704)	$ 41	7,266			$ (18,011)
Dividends per common share	(23,917)	(23,917)			(23,917)
Stock-based compensation expense	6,027	6,027		6,027
Other comprehensive income	(32,812)	(32,652)				(32,652)		(160)
Acquisitions	739							739
Ending balance (in shares) at Oct. 31, 2021			66,058,290				10,438,198
Balance at end of period, net of tax at Oct. 31, 2021	$ 3,132,242	$ 3,102,839	$ 6,606	$ 473,775	$ 2,988,726	$ 11,969	$ (378,237)	$ 29,403