Consolidated Statements of Stockholders Equity Statement - USD ($) $ in Thousands	Total	Additional Paid-in Capital	Retained Earnings	Accumulated Other Comprehensive Loss	Noncontrolling Interest	Common & Class B Stock	Treasury Stock
Total, Beginning of Period at Jul. 31, 2017	$ 126,037	$ 36,242	$ 154,735	$ (10,292)	$ 0	$ 1,053	$ (55,701)
Common & Class B Stock, Beginning of Period (in shares) at Jul. 31, 2017						10,528,678
Treasury Stock, Beginning of Period (in shares) at Jul. 31, 2017							(3,232,111)
Net Income	8,222	0		0		$ 0	$ 0
Net Income (Loss) Attributable to Noncontrolling Interest	(18)				(18)
Net Income Attributable to Oil-Dri	8,240		8,240
Other Comprehensive Income (Loss)	1,941	0	0	1,941	0	0	0
Reclassification upon adoption of accounting standard	0	0	2,264	(2,264)	0	0	0
Dividends Declared	(6,304)	0	(6,304)	0	0	0	0
Purchases of Treasury Stock	(27)	0	0	0	0	$ 0	$ (27)
Purchases of Treasury Stock (in shares)							(622)
Net Issuance of Stock Under Long-Term Incentive Plans (in shares)						27,150	(6,100)
Net issuance of stock under long-term incentive plans	241	456	0	0	0	$ 3	$ (218)
Amortization of Restricted Stock	1,775	1,775	0	0	0	0	0
Total, End of Period at Jul. 31, 2018	131,885	38,473	158,935	(10,615)	(18)	$ 1,056	$ (55,946)
Common & Class B Stock, End of Period (in shares) at Jul. 31, 2018						10,555,828
Treasury Stock, End of Period (in shares) at Jul. 31, 2018							(3,238,833)
Net Income	12,615	0		0		$ 0	$ 0
Net Income (Loss) Attributable to Noncontrolling Interest	4				4
Net Income Attributable to Oil-Dri	12,611
Other Comprehensive Income (Loss)	(4,424)	0	0	(4,424)	0	0	0
Dividends Declared	(6,790)	0	(6,790)	0	0	0	0
Purchases of Treasury Stock	(147)	0	0	0	0	$ 0	$ (147)
Purchases of Treasury Stock (in shares)							(4,905)
Net Issuance of Stock Under Long-Term Incentive Plans (in shares)						304,850	(7,550)
Net issuance of stock under long-term incentive plans	(1)	419	0	0	0	$ 30	$ (450)
Amortization of Restricted Stock	2,408	2,408	0	0	0	0	0
Total, End of Period at Jul. 31, 2019	$ 135,546	$ 41,300	$ 164,756	$ (15,039)	$ (14)	$ 1,086	$ (56,543)
Common & Class B Stock, End of Period (in shares) at Jul. 31, 2019						10,860,678
Treasury Stock, End of Period (in shares) at Jul. 31, 2019							(3,251,288)