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Sale of Properties (Details) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
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Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012 Property
Sale of Properties [Abstract] |  |  |
Properties Sold |  |  | 4 laws_PropertiesSold
Proceeds from Sale of Property, Plant, and Equipment | $ 8,307 us-gaap_ProceedsFromSaleOfPropertyPlantAndEquipment | $ 38 us-gaap_ProceedsFromSaleOfPropertyPlantAndEquipment | $ 12,278 us-gaap_ProceedsFromSaleOfPropertyPlantAndEquipment
Gain (Loss) on Disposition of Property Plant Equipment, Excluding Oil and Gas Property and Timber Property | $ (142)us-gaap_GainLossOnDispositionOfAssets | $ 4 us-gaap_GainLossOnDispositionOfAssets | $ 3,721 us-gaap_GainLossOnDispositionOfAssets

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- Definition Properties sold. + References No definition available. + Details
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Namespace Prefix: | laws_
Data Type: | xbrli:integerItemType
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Period Type: | duration

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

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- Definition Amount of gain (loss) on sale or disposal of property, plant and equipment assets, excluding oil and gas property and timber property. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6391110&loc=d3e2941-110230 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6360339&loc=d3e1361-107760 + Details
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Namespace Prefix: | us-gaap_
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Balance Type: | credit
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- Definition The cash inflow from the sale of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Investing Activities -URI http://asc.fasb.org/extlink&oid=6516133 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 12 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3179-108585 + Details
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Balance Type: | debit
Period Type: | duration