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Note 16 - Segment Information: (Detail) - Segment Reporting Information (USD $)
In Thousands, unless otherwise specified
 3 Months Ended 6 Months Ended
Jun. 30, 2012
Jun. 30, 2011
Jun. 30, 2012
Jun. 30, 2011
Net sales        
Total net sales $ 367,365 $ 299,000 $ 749,417 $ 593,381
Operating income        
Total operating income 9,744 13,899 22,007 31,212
Depreciation and amortization        
Total depreciation and amortization 5,135 3,512 10,127 6,979
Capital expenditures        
Total capital expenditures 7,714 8,513 15,683 16,416
Flat Products [Member]
        
Net sales        
Total net sales 307,887 299,000 624,516 593,381
Operating income        
Total operating income 5,299 13,899 11,118 31,212
Depreciation and amortization        
Total depreciation and amortization 3,952 3,512 7,822 6,979
Capital expenditures        
Total capital expenditures 5,286 8,513 10,732 16,416
Tubular and Pipe Products [Member]
        
Net sales        
Total net sales 59,478   124,901  
Operating income        
Total operating income 4,445   10,889  
Depreciation and amortization        
Total depreciation and amortization 1,183   2,305  
Capital expenditures        
Total capital expenditures $ 2,428   $ 4,951