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Note 1 - Summary of Significant Accounting Policies (Detail) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
--- | ---
Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2010
Number of Reportable Segments | 2 |  |
Allowance for Doubtful Accounts Receivable (in Dollars) | $ 2,781 | $ 2,883 |
Provision for Doubtful Accounts (in Dollars) | 322 | 1,125 | 3,031
LIFO Inventory Amount (in Dollars) | $ 46,711 |  |
Percentage of LIFO Inventory | 16.10% |  |
Property, Plant and Equipment, Estimated Useful Lives | five years |  |
Engineered Products [Member] |  |  |
Sales Revenue, Goods, Net, Percentage | 1.30% | 1.00% |
Steel Requirements [Member] |  |  |
Concentration Risk, Percentage | 39.00% | 49.00% | 37.00%
Largest Customer [Member] | Sales Revenue, Goods, Net [Member] |  |  |
Concentration Risk, Percentage | 4.00% | 4.00% | 5.00%
Three Largest US Automobile Manufacturers [Member] | Sales Revenue, Goods, Net [Member] |  |  |
Concentration Risk, Percentage | 8.40% | 9.90% | 12.30%
Other Steel Service Centers [Member] | Sales Revenue, Goods, Net [Member] |  |  |
Concentration Risk, Percentage | 7.60% | 9.00% | 10.70%
Minimum [Member] |  |  |
Property, Plant and Equipment, Estimated Useful Lives | two years |  |
Maximum [Member] |  |  |
Property, Plant and Equipment, Estimated Useful Lives | 30 years |  |
Sales Revenue, Goods, Net [Member] |  |  |
Concentration Risk, Percentage | 31.00% | 32.00% | 34.00%

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