CONDENSED CONSOLIDATED STATEMENTS OF INCOME AND COMPREHENSIVE INCOME - USD ($) $ in Thousands	3 Months Ended
	Oct. 31, 2020	Oct. 31, 2019
Income Statement [Abstract]
Net sales	$ 2,537,360	$ 2,158,785
Cost of products sold	2,158,508	1,849,974
Gross profit	378,852	308,811
Selling, general and administrative expenses	181,763	188,464
Amortization of intangible assets	27,427	24,293
Interest income	318	975
Interest expense	24,276	28,025
Other income (expense), net	615	(370)
Income before income taxes	146,319	68,634
Income tax provision	30,680	16,789
Net income	115,639	51,845
Less: Net income attributable to non-controlling interests	1,882	780
Net income attributable to THOR Industries, Inc.	$ 113,757	$ 51,065
Weighted-average common shares outstanding:
Basic (in shares)	55,238,164	55,095,074
Diluted (in shares)	55,554,682	55,224,655
Earnings per common share:
Basic (in dollars per share)	$ 2.06	$ 0.93
Diluted (in dollars per share)	$ 2.05	$ 0.92
Comprehensive income:
Net income	$ 115,639	$ 51,845
Other comprehensive income (loss), net of tax
Foreign currency translation adjustment	(18,993)	993
Unrealized gain (loss) on derivatives, net of tax	3,332	(3,722)
Total other comprehensive loss, net of tax	(15,661)	(2,729)
Total Comprehensive income	99,978	49,116
Less: Comprehensive income attributable to non-controlling interests	1,995	638
Comprehensive income attributable to THOR Industries, Inc.	$ 97,983	$ 48,478