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Note 5 - Derivative Instruments - Impact from Derivatives on Consolidated Statements of Comprehensive Income (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Interest Rate Swap [Member] | Chicago Tube and Iron Company Acquisition [Member]
Derivatives	$ (19)	$ (15)	$ (52)	$ (50)
Interest Rate Swap [Member] | A B L Credit Facility [Member]
Derivatives		(90)	(98)	(284)
Cash Flow Metals Hedges [Member]
Derivatives		(544)		(1,629)
Metals Swap [Member]
Derivatives	111	(571)	173	(1,958)
Embedded Customer Derivatives [Member]
Derivatives	(111)	571	(173)	1,958
Derivatives	$ (19)	$ (649)	$ (150)	$ (1,963)

X

- Definition

Total amount of gain (loss) derived from fair value hedges recognized in earnings in the period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4C
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=64837297&loc=SL5624171-113959

+ Details

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