CONSOLIDATED STATEMENTS OF OPERATIONS [Parenthetical] (USD $)	12 Months Ended
Jan. 31, 2013	Jan. 31, 2012
Disposal Group Including Discontinued Operation Shutdown Expenses Accrual	$ 800,000	$ 1,734,000

Amount of operating expenses accrual or loss attributable to the disposal group, including a component of the entity (discontinued operation), during the reporting period.

No definition available.

Name:	lake_DisposalGroupIncludingDiscontinuedOperationShutdownExpensesAccrual
Namespace Prefix:	lake_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration