Derivative Financial Instruments (Tables)

12 Months Ended

Dec. 31, 2012

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Schedule of Derivative Instruments in Statement of Financial Position, Fair Value [Table Text Block]

The effects of derivative instruments on our consolidated financial statements were as follows as of December 31, 2012 and 2011 and for the years then ended (in thousands) (amounts presented exclude any income tax effects).

Fair Value of Derivative Instruments in Consolidated Balance Sheet

		Derivative Assets (Liabilities)
		Fair Value at December 31,
Consolidated Balance Sheet Location		2012		2011
Derivative not designated as hedging instrument:
Commodity contract	Other current assets	$	—	$	(470	)
Cash collateral held or provided with counterparty	Other current assets		—		781
Total		$	—	$	311

Effects of Derivative Instruments on Income

		Years Ended December 31,
Consolidated Statements of Operations Location		2012			2011
		gain (loss)			gain (loss)
Derivative not designated as hedging instrument:
Commodity contract	Net Sales	$	(1,498	)	$	(532	)
Commodity contract	Cost of Goods Sold		(1,886	)		(455	)
	Net amount recognized in earnings	$	(3,384	)	$	(987	)