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