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Note 6 - Impact to Consolidated Statements of Operations of Derivatives (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2015
Sep. 30, 2014
Sep. 30, 2015
Sep. 30, 2014
Interest Rate Swap [Member] | Chicago Tube and Iron Company Acquisition [Member]        
Derivatives $ (15) $ (33) $ (50) $ (80)
Interest Rate Swap [Member] | A B L Credit Facility [Member]        
Derivatives (90) (118) (284) (363)
Metals Swap [Member]        
Derivatives (571) (467) (1,958) 1,305
Embedded Customer Derivatives [Member]        
Derivatives 571 467 1,958 (1,305)
Derivatives $ (105) $ (151) $ (334) $ (443)