Summary of Quarterly Financial Information (Unaudited) (Tables)

12 Months Ended

Dec. 31, 2011

Summary of Quarterly Financial Information (Unaudited) [Abstract]

Summary of unaudited financial data

2011	MARCH 31		JUNE 30		SEPTEMBER 30	DECEMBER 31
Net sales	$	476,234	$	434,351	$  412,183	$  283,248
Gross profit		192,610		143,330	175,195	112,613
Net earnings (loss) *		11,808		(29,916)	8,285	(57,661)
Net earnings (loss) per share:
Basic	$	0.24	$	(0.62)	$        0.17	$      (1.18)
Diluted		0.24		(0.62)	0.17	(1.18)

2010	MARCH 31		JUNE 30		SEPTEMBER 30	DECEMBER 31
Net sales	$	492,764	$	504,859	$  554,626	$  454,619
Gross profit		237,418		237,645	252,651	184,192
Net earnings		56,296		40,237	36,378	3,237
Net earnings per share:
Basic	$	1.20	$	0.85	$        0.76	$        0.07
Diluted		1.15		0.82	0.74	0.07

* Included in the quarter ended December 31, 2011 is an impairment of property, plant and equipment of $1.5 million and an impairment of intangible assets of $1.6 million (see note 1).