Derivative Financial Instruments (Tables)

9 Months Ended

Sep. 30, 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 September 30, 2012 and December 31, 2011, and for the three and nine months ended September 30, 2012 and 2011(in thousands) (amounts presented exclude any income tax effects and have not been adjusted for the amount attributable to the noncontrolling interest).

Fair Value of Derivative Instruments in Consolidated Balance Sheet

		Derivative Assets (Liabilities)
	Consolidated Balance Sheet Location	September 30, 2012		December 31, 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

		Three Months Ended  September 30,					Nine Months Ended  September 30,
Consolidated Statements of Operations Location		2012			2011		2012			2011
		gain (loss)			gain (loss)		gain (loss)			gain (loss)
Derivative not designated as hedging instrument:
Commodity contract	Net Sales	$	(592	)	$	—	$	(1,498	)	$	(532	)
Commodity contract	Cost of Goods Sold		(1,365	)		—		(1,886	)		—
	Net amount recognized in earnings	$	(1,957	)	$	—	$	(3,384	)	$	(532	)