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Note 12 - Segment Information (Detail) - Segment Reporting Information (USD $) In Thousands, unless otherwise specified | 3 Months Ended
--- | ---
Mar. 31, 2013 | Mar. 31, 2012
Net sales |  |
Net sales | $ 338,064 | $ 382,052
Depreciation and amortization |  |
Depreciation and amortization | 5,515 | 4,992
Operating income |  |
Operating income | 9,581 | 12,263
Other income, net | 23 | 34
Income before interest and income taxes | 9,604 | 12,297
Interest and other expense on debt | 1,698 | 2,108
Income before income taxes | 7,906 | 10,189
Capital expenditures |  |
Capital expenditures | 1,714 | 7,969
Flat Products [Member] |  |
Net sales |  |
Net sales | 275,747 | 316,629
Depreciation and amortization |  |
Depreciation and amortization | 4,242 | 3,870
Operating income |  |
Operating income | 4,805 | 7,794
Capital expenditures |  |
Capital expenditures | 679 | 5,447
Tubular and Pipe Products [Member] |  |
Net sales |  |
Net sales | 62,317 | 65,423
Depreciation and amortization |  |
Depreciation and amortization | 1,273 | 1,122
Operating income |  |
Operating income | 6,759 | 6,444
Capital expenditures |  |
Capital expenditures | 1,035 | 2,522
Corporate Expenses (Member) |  |
Operating income |  |
Operating income | $ (1,983) | $ (1,975)

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