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v2.4.0.6

Related Party Transaction (Details) (Board of Directors Chairman [Member], USD $) In Millions, unless otherwise specified | 12 Months Ended
--- | ---
Dec. 31, 2011 | Dec. 31, 2010 partnerships
Board of Directors Chairman [Member] |  |
Related Party Transaction [Line Items] |  |
Number of partnerships |  | 2
Legal Fees | $ 0.1 | $ 0.7

X
- Definition Related Party Number of Partnerships With Interest in Company Common Stock + References No definition available. + Details
Name: | laws_RelatedPartyNumberOfPartnershipsWithInterestInCompanyCommonStock
Namespace Prefix: | laws_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Related Party Transaction Legal Fees + References No definition available. + Details
Name: | laws_RelatedPartyTransactionLegalFees
Namespace Prefix: | laws_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Details
Name: | us-gaap_RelatedPartyTransactionLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration