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Loan Agreement Narrative (Details) (USD $)	3 Months Ended	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Line of Credit Facility [Line Items]
Secured Debt, Current	$ 0us-gaap_SecuredDebtCurrent	$ 0us-gaap_SecuredDebtCurrent	$ 16,078,000us-gaap_SecuredDebtCurrent
Credit Facility (Textual) [Abstract]
Eligible accounts receivables percentage	80.00%laws_NewCreditFacilityAccountsReceivableBasePercentage
Eligible accounts receivables past due days		60 days
Eligible inventory percentage		50.00%laws_NewCreditFacilityInventoryBasePercentage
Eligible inventory expected to be sold period		18 months
Maximum borrowing amount based on inventory		20,000,000laws_NewCreditFacilityMaximumBorrowingsBasedOnInventory
Credit Facility, remaining borrowing capacity	31,900,000us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity	31,900,000us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity
Interest Paid		800,000us-gaap_InterestPaid	1,100,000us-gaap_InterestPaid	700,000us-gaap_InterestPaid
Weighted average interest rate	2.94%us-gaap_DebtWeightedAverageInterestRate	2.94%us-gaap_DebtWeightedAverageInterestRate
Maximum
Credit Facility (Textual) [Abstract]
Spread on LIBOR		1.85%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1 / us-gaap_RangeAxis = us-gaap_MaximumMember
Dividends restricted amount		7,000,000.0laws_RestrictedDividends / us-gaap_RangeAxis = us-gaap_MaximumMember
Minimum
Credit Facility (Textual) [Abstract]
Spread on LIBOR		1.50%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1 / us-gaap_RangeAxis = us-gaap_MinimumMember
Revolving Credit Facility [Member]
Credit Facility (Textual) [Abstract]
Credit facility, borrowing capacity	40,000,000us-gaap_LineOfCreditFacilityCurrentBorrowingCapacity / us-gaap_CreditFacilityAxis = us-gaap_RevolvingCreditFacilityMember	40,000,000us-gaap_LineOfCreditFacilityCurrentBorrowingCapacity / us-gaap_CreditFacilityAxis = us-gaap_RevolvingCreditFacilityMember
Letter of Credit [Member]
Credit Facility (Textual) [Abstract]
Credit facility, borrowing capacity	$ 10,000,000us-gaap_LineOfCreditFacilityCurrentBorrowingCapacity / us-gaap_CreditFacilityAxis = us-gaap_LetterOfCreditMember	$ 10,000,000us-gaap_LineOfCreditFacilityCurrentBorrowingCapacity / us-gaap_CreditFacilityAxis = us-gaap_LetterOfCreditMember

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- Definition

New credit facility accounts receivable base past due days.

+ References

No definition available.

+ Details

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Balance Type:	na
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- Definition

New credit facility accounts receivable base percentage.

+ References

No definition available.

+ Details

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Namespace Prefix:	laws_
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Balance Type:	na
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- Definition

New credit facility inventory base percentage.

+ References

No definition available.

+ Details

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Balance Type:	na
Period Type:	duration

X

- Definition

New credit facility inventory base selling period.

+ References

No definition available.

+ Details

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- Definition

The maximum borrowings available based on inventory balance under the new credit facility.

+ References

No definition available.

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
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- Definition

Restricted dividends.

+ References

No definition available.

+ Details

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Balance Type:	debit
Period Type:	duration

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- Definition

Percentage points added to the reference rate to compute the variable rate on the debt instrument.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
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- Definition

Weighted average interest rate of debt outstanding.

+ References

No definition available.

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- Definition

The amount of cash paid for interest during the period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 50

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4297-108586



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 25

-Subparagraph (e)

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3536-108585

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- Definition

Amount of current borrowing capacity under the credit facility considering any current restrictions on the amount that could be borrowed (for example, borrowings may be limited by the amount of current assets), but without considering any amounts currently outstanding under the facility.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.19(b),22(b))

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 19, 22

-Article 5

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- Definition

Amount of borrowing capacity currently available under the credit facility (current borrowing capacity less the amount of borrowings outstanding).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.19(b),22(b))

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682



Reference 2: http://www.xbrl.org/2003/role/presentationRef

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-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 19, 22

-Article 5

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- Definition

Carrying value as of the balance sheet date of the portion of long-term, collateralized debt obligations due within one year or the operating cycle, if longer. Such obligations include mortgage loans, chattel loans, and any other borrowings secured by assets of the borrower.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.20)

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682



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-Number 210

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