Operating Segments (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Apr. 30, 2020	Apr. 30, 2019	Apr. 30, 2020	Apr. 30, 2019	Jul. 31, 2019
Segment Reporting Information
Assets	$ 215,981		$ 215,981		$ 205,227
Net Sales	76,256	$ 70,885	218,383	$ 206,908
Corporate Expenses	(8,910)	(9,288)	(23,732)	(22,424)
Income from Operations	5,700	2,327	15,694	6,157
Total Other (Expense) Income, Net	(103)	4,377	(262)	4,219
Income before Income Taxes	5,597	6,704	15,432	10,376
Income Tax Expense	(947)	(1,143)	(2,573)	(1,599)
Net Income	4,650	5,561	12,859	8,777
Net Income (Loss) Attributable to Noncontrolling Interest	2	(58)	(155)	(35)
Net Income Attributable to Oil-Dri	4,648	5,619	13,014	8,812
Business to Business Products
Segment Reporting Information
Assets	69,184		69,184		66,655
Net Sales	26,683	26,041	77,632	77,825
Segment Income	8,198	7,454	24,046	21,758
Retail and Wholesale Products
Segment Reporting Information
Assets	100,636		100,636		95,593
Net Sales	49,573	44,844	140,751	129,083
Segment Income	6,412	$ 4,161	15,380	$ 6,823
Unallocated Assets
Segment Reporting Information
Assets	$ 46,161		$ 46,161		$ 42,979