Consolidated Statement of 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, 2019			65,189,907
Beginning balance (in shares) at Jul. 31, 2019							10,126,434
Balance at beginning of period, net of tax at Jul. 31, 2019	$ 2,095,228	$ 2,084,425	$ 6,519	$ 416,382	$ 2,066,674	$ (57,004)	$ (348,146)	$ 10,803
Net income (loss)	221,384	222,974			222,974			(1,590)
Restricted stock unit activity (in shares)			206,624				71,341
Restricted stock unit activity	(3,185)	(3,185)	$ 21	557			$ (3,763)
Cash dividends	(88,318)	(88,318)			(88,318)
Stock compensation expense	19,889	19,889		19,889
Other comprehensive income (loss)	83,736	83,997				83,997		(261)
Acquisitions	16,835							16,835
Ending balance (in shares) at Jul. 31, 2020			65,396,531
Ending balance (in shares) at Jul. 31, 2020							10,197,775
Balance at end of period at Jul. 31, 2020	2,345,569	2,319,782	$ 6,540	436,828	2,201,330	26,993	$ (351,909)	25,787
Net income (loss)	660,870	659,872			659,872			998
Restricted stock unit activity (in shares)			255,039				87,554
Restricted stock unit activity	(15,152)	(15,152)	$ 25	(6,860)			$ (8,317)
Cash dividends	(90,801)	(90,801)			(90,801)
Stock compensation expense	30,514	30,514		30,514
Other comprehensive income (loss)	17,711	17,628				17,628		83
Dividend paid to non-controlling interest	$ (605)							(605)
Ending balance (in shares) at Jul. 31, 2021			65,651,570
Ending balance (in shares) at Jul. 31, 2021	10,285,329						10,285,329
Balance at end of period at Jul. 31, 2021	$ 2,948,106	2,921,843	$ 6,565	460,482	2,770,401	44,621	$ (360,226)	26,263
Net income (loss)	$ 1,138,243	1,137,804			1,137,804			439
Purchase of treasury shares (in shares)	1,944,243						1,944,243
Purchase of treasury shares	$ (165,107)	(165,107)					$ (165,107)
Restricted stock unit activity (in shares)			407,833				152,869
Restricted stock unit activity	(13,443)	(13,443)	$ 41	4,527			$ (18,011)
Cash dividends	(94,944)	(94,944)			(94,944)
Stock compensation expense	31,421	31,421		31,421
Other comprehensive income (loss)	(227,661)	(226,228)				(226,228)		(1,433)
Dividend paid to non-controlling interest	(555)							(555)
Acquisitions	$ (15,406)	1,516		1,516				(16,922)
Ending balance (in shares) at Jul. 31, 2022			66,059,403
Ending balance (in shares) at Jul. 31, 2022	12,382,441						12,382,441
Balance at end of period at Jul. 31, 2022	$ 3,600,654	$ 3,592,862	$ 6,606	$ 497,946	$ 3,813,261	$ (181,607)	$ (543,344)	$ 7,792