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Stock Based Compensation (Details) (USD $) In Thousands, except Share data, unless otherwise specified	9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013
Loan Agreement [Line Items]
Share-based Compensation	$ 3,956	$ 1,705
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Granted	114,753
Share Based Compensation Non Option Equity Instruments Granted Weighted Average Exercise Price	$ 12.89
MSU [Member]
Loan Agreement [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Granted	51,292
Minimum [Member]
Loan Agreement [Line Items]
Equity Share Payout Range	0
Maximum [Member]
Loan Agreement [Line Items]
Equity Share Payout Range	76,941
restricted stock units [Member]
Loan Agreement [Line Items]
Restricted Stock, Shares Issued Net of Shares for Tax Withholdings	25,123
Restricted Stock [Member]
Loan Agreement [Line Items]
Restricted Stock, Shares Issued Net of Shares for Tax Withholdings	12,000

X

- Definition

Equity Share Payout Range

+ References

No definition available.

+ Details

Name:	laws_EquitySharePayoutRange
Namespace Prefix:	laws_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Share Based Compensation Non Option Equity Instruments Granted Weighted Average Exercise Price

+ References

No definition available.

+ Details

Name:	laws_ShareBasedCompensationNonOptionEquityInstrumentsGrantedWeightedAverageExercisePrice
Namespace Prefix:	laws_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	duration

X

- Details

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

X

- Definition

The number of restricted shares issued as compensation, net of shares for the payment of withholding taxes. This element is to be used only if shares are used in lieu of cash to satisfy all or a portion of withholding taxes.

+ References

No definition available.

+ Details

Name:	us-gaap_RestrictedStockSharesIssuedNetOfSharesForTaxWithholdings
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

X

- Definition

The aggregate amount of noncash, equity-based employee remuneration. This may include the value of stock or unit options, amortization of restricted stock or units, and adjustment for officers' compensation. As noncash, this element is an add back when calculating net cash generated by operating activities using the indirect method.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 28

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585

+ Details

Name:	us-gaap_ShareBasedCompensation
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Net number of non-option equity instruments granted to participants.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (c)(1)(iv)(1)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration