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Loan Agreement Covenant (Details)	9 Months Ended
	Sep. 30, 2019
Loan Agreement [Line Items]
Minimum Debt Service Coverage Ratio	1.15
Minimum Net Leverage Ratio	3.25

X

- Definition

Minimum debt service coverage ratio.

+ References

No definition available.

+ Details

Name:	laws_MinimumDebtServiceCoverageRatio
Namespace Prefix:	laws_
Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Minimum Net Leverage Ratio

+ References

No definition available.

+ Details

Name:	laws_MinimumNetLeverageRatio
Namespace Prefix:	laws_
Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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