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Document and Entity Information - USD ($)
 12 Months Ended
Aug. 31, 2022
Oct. 18, 2022
Feb. 28, 2022
Cover [Abstract]      
Document Type 10-K    
Amendment Flag false    
Document Period End Date Aug. 31, 2022    
Document Fiscal Year Focus 2022    
Document Fiscal Period Focus FY    
Trading Symbol LNN    
Entity Registrant Name Lindsay Corporation    
Entity Central Index Key 0000836157    
Entity Current Reporting Status Yes    
Current Fiscal Year End Date --08-31    
Entity Filer Category Large Accelerated Filer    
Entity Voluntary Filers No    
Entity Well-known Seasoned Issuer Yes    
Entity Shell Company false    
ICFR Auditor Attestation Flag true    
Entity Small Business false    
Entity Emerging Growth Company false    
Entity Interactive Data Current Yes    
Entity File Number 1-13419    
Entity Incorporation, State or Country Code DE    
Entity Tax Identification Number 47-0554096    
Entity Address, Address Line One 18135 Burke Street    
Entity Address, Address Line Two Suite 100    
Entity Address, City or Town Omaha    
Entity Address, State or Province NE    
Entity Address, Postal Zip Code 68022    
City Area Code 402    
Local Phone Number 829-6800    
Document Annual Report true    
Document Transition Report false    
Title of 12(b) Security Common Stock, $1.00 par value    
Security Exchange Name NYSE    
Auditor Name KPMG LLP    
Auditor Location Omaha, Nebraska    
Auditor Firm ID 185    
Entity Public Float     $ 1,440,382,967
Entity Common Stock, Shares Outstanding   10,980,238  
Documents Incorporated by Reference [Text Block]

DOCUMENTS INCORPORATED BY REFERENCE

Portions of the Proxy Statement pertaining to the Registrant’s annual stockholders' meeting to be held on January 10, 2023 are incorporated by reference into Part III of this Annual Report on Form 10-K.