Quarterly Financial Data (Unaudited) (Tables)

12 Months Ended

Dec. 31, 2011

Quarterly Financial Data (Unaudited) [Abstract]

Unaudited quarterly results of operations

The table below summarizes the unaudited quarterly results of operations for the past two years (in thousands, except per share data):

		Quarter
		2011										2010
			First			Second		Third		Fourth			First			Second		Third		Fourth
Net sales		$	312,889		$	706,423	$	503,584	$	270,422		$	269,833		$	647,467	$	455,020	$	241,426
Gross profit			91,410			211,439		147,906		80,835			76,292			190,534		130,869		73,567
Net income (loss)			(638	)		58,577		24,169		(10,115	)		(6,111	)		52,770		22,784		(11,805	)
Earnings (loss) per share:
	Basic	$	(0.01	)	$	1.21	$	0.50	$	(0.21	)	$	(0.12	)	$	1.07	$	0.46	$	(0.24	)
	Diluted	$	(0.01	)	$	1.19	$	0.50	$	(0.21	)	$	(0.12	)	$	1.05	$	0.45	$	(0.24	)