Interim Financial Data (Unaudited) (Tables)

12 Months Ended

Dec. 31, 2012

Interim Financial Data (Unaudited) [Abstract]

Summary of Interim Financial Data

	Three Months Ended
	December 31, 2012			September 30, 2012 (a)			June 30, 2012		March 31, 2012		December 31, 2011 (b)			September 30, 2011			June 30, 2011		March 31, 2011
	(In thousands, except per share data)
Net sales		46,155			70,819			94,279		96,100		51,462			67,916			78,405		69,006
Gross profit (loss)		13,426			2,146			33,590		35,419		(1,052	)		17,272			23,542		23,029
Net income (loss)		(3,619	)		(14,312	)		8,339		12,311		(18,255	)		(496	)		2,106		5,057
Basic net income (loss) per share	$	(0.22	)	$	(0.86	)	$	0.54	$	0.80	$	(1.18	)	$	(0.03	)	$	0.14	$	0.33
Diluted net income (loss) per share	$	(0.22	)	$	(0.86	)	$	0.48	$	0.74	$	(1.18	)	$	(0.03	)	$	0.12	$	0.30