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Schedule of Carrying Amounts of Major classes of Assets and Liabilities Classified as Held-for-Sale (Parenthetical) (Details) $ in Thousands	May 31, 2018 USD ($)
Discontinued Operations And Disposal Groups [Abstract]
Receivables, allowance	$ 547

X

- Definition

Disposal group including discontinued operation allowance for accounts, notes and loans receivable.

+ References

No definition available.

+ Details

Name:	lnn_DisposalGroupIncludingDiscontinuedOperationAllowanceForAccountsNotesAndLoansReceivable
Namespace Prefix:	lnn_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- References

No definition available.

+ Details

Name:	us-gaap_DiscontinuedOperationsAndDisposalGroupsAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration