CONDENSED CONSOLIDATED STATEMENTS OF INCOME AND COMPREHENSIVE INCOME - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jan. 31, 2021	Jan. 31, 2020	Jan. 31, 2021	Jan. 31, 2020
Income Statement [Abstract]
Net sales	$ 2,727,788	$ 2,003,133	$ 5,265,148	$ 4,161,918
Cost of products sold	2,312,911	1,746,727	4,471,419	3,596,701
Gross profit	414,877	256,406	793,729	565,217
Selling, general and administrative expenses	206,189	162,357	387,952	350,821
Amortization of intangible assets	29,203	24,273	56,630	48,566
Impairment charges	0	10,057	0	10,057
Interest income	202	974	520	1,949
Interest expense	24,164	27,234	48,440	55,259
Other income, net	8,436	1,404	9,051	1,034
Income before income taxes	163,959	34,863	310,278	103,497
Income tax provision	32,769	7,837	63,449	24,626
Net income	131,190	27,026	246,829	78,871
Less: Net income (loss) attributable to non-controlling interests	(1,334)	(1,647)	548	(867)
Net income attributable to THOR Industries, Inc.	$ 132,524	$ 28,673	$ 246,281	$ 79,738
Weighted-average common shares outstanding:
Basic (in shares)	55,366,241	55,198,756	55,302,203	55,146,915
Diluted (in shares)	55,568,667	55,396,116	55,561,675	55,310,385
Earnings per common share:
Basic (in dollars per share)	$ 2.39	$ 0.52	$ 4.45	$ 1.45
Diluted (in dollars per share)	$ 2.38	$ 0.52	$ 4.43	$ 1.44
Comprehensive income:
Net income	$ 131,190	$ 27,026	$ 246,829	$ 78,871
Other comprehensive income (loss), net of tax
Foreign currency translation adjustment	60,133	(11,902)	41,140	(10,909)
Unrealized gain (loss) on derivatives, net of tax	2,351	(224)	5,683	(3,946)
Total other comprehensive income (loss), net of tax	62,484	(12,126)	46,823	(14,855)
Total Comprehensive income	193,674	14,900	293,652	64,016
Less: Comprehensive income (loss) attributable to non-controlling interests	(1,307)	(1,949)	688	(1,311)
Comprehensive income attributable to THOR Industries, Inc.	$ 194,981	$ 16,849	$ 292,964	$ 65,327