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Stock-Based Compensation Plans Market Stock Units (Details) (USD $) | 12 Months Ended
--- | ---
Dec. 31, 2014 | Dec. 31, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Trading days | 30 days |
MSU Expense | $ 300,000 laws_MSUExpense | $ 200,000 laws_MSUExpense
Number of Market Stock Units |  |
Outstanding on December 31, 2013 | 58,999 laws_MSUOutstandingBalance |
Granted | 54,948 laws_MSUGrants |
Exchanged for shares | (884)laws_MSUsExchangedforShares |
Cancelled | (24,463)laws_MSUCancellations |
Outstanding on December 31, 2014 | 88,600 laws_MSUOutstandingBalance | 58,999 laws_MSUOutstandingBalance
Maximum Shares Potentially Issuable |  |
Outstanding on December 31, 2013 | 88,499 laws_PotentialSharesfromMSUsOutstanding |
Granted | 82,422 laws_PotentialSharesfromMSUGrants |
Exchanged for shares | (1,326)laws_SharesIssuedOnVestingofMSUs |
Cancelled | (36,695)laws_PotentialSharesFromMSUCancellations |
Outstanding on December 31, 2014 | 132,900 laws_PotentialSharesfromMSUsOutstanding | 88,499 laws_PotentialSharesfromMSUsOutstanding
Minimum |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Potential Shares From MSU Vest | 0 laws_PotentialSharesFromMSUVest / us-gaap_RangeAxis = us-gaap_MinimumMember |
Maximum |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Potential Shares From MSU Vest | $ 1.50 laws_PotentialSharesFromMSUVest / us-gaap_RangeAxis = us-gaap_MaximumMember |

X
- Definition MSU Cancellations + References No definition available. + Details
Name: | laws_MSUCancellations
Namespace Prefix: | laws_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition MSU Expense + References No definition available. + Details
Name: | laws_MSUExpense
Namespace Prefix: | laws_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition MSU Grants + References No definition available. + Details
Name: | laws_MSUGrants
Namespace Prefix: | laws_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Outstanding Balance of Market Stock Units + References No definition available. + Details
Name: | laws_MSUOutstandingBalance
Namespace Prefix: | laws_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Definition MSUs Exchanged for Shares + References No definition available. + Details
Name: | laws_MSUsExchangedforShares
Namespace Prefix: | laws_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Common Shares No Longer Potentially Issuable due to the cancellation of Market Stock Units (MSUs) + References No definition available. + Details
Name: | laws_PotentialSharesFromMSUCancellations
Namespace Prefix: | laws_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Common Shares potentially issuable upon the vesting of the Market Stock Units (MSUs) Granted + References No definition available. + Details
Name: | laws_PotentialSharesfromMSUGrants
Namespace Prefix: | laws_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Common Shares Potentially Issuable upon Vesting of the Market Stock Units (MSUs) Outstanding + References No definition available. + Details
Name: | laws_PotentialSharesfromMSUsOutstanding
Namespace Prefix: | laws_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Definition Potential Shares From MSU Vest + References No definition available. + Details
Name: | laws_PotentialSharesFromMSUVest
Namespace Prefix: | laws_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Details
Name: | laws_SharebasedCompensationArrangementbySharebasedPaymentAwardMarketStockUnitOutstandingRollForward
Namespace Prefix: | laws_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Details
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Namespace Prefix: | laws_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Common Shares Issued in Exchange for Vested Market Stock Units (MSUs) + References No definition available. + Details
Name: | laws_SharesIssuedOnVestingofMSUs
Namespace Prefix: | laws_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Trading days + References No definition available. + Details
Name: | laws_Tradingdays
Namespace Prefix: | laws_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

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

X
- Details
Name: | us-gaap_RangeAxis=us-gaap_MaximumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RangeAxis=us-gaap_MinimumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |