Quarterly Financial Data (Tables)

12 Months Ended

Dec. 31, 2011

Quarterly Financial Information Disclosure [Abstract]

Schedule of Quarterly Financial Information [Table Text Block]

	Year Ended December 31, 2011
	First  Quarter		Second  Quarter		Third  Quarter		Fourth  Quarter
Net sales	$	439,898	$	470,610	$	455,875	$	430,866
Operating income	88,133		92,235		74,761		59,477
Income from operations before income taxes	73,339		82,486		66,141		50,328
Net income	46,562		52,227		41,132		29,497
Basic earnings per share	0.43		0.45		0.35		0.25
Diluted earnings per share	0.43		0.44		0.35		0.25

	Year Ended January 1, 2011
	First  Quarter		Second  Quarter		Third  Quarter		Fourth  Quarter (a)
Net sales	$	162,782	$	166,210	$	168,685	$	227,232
Operating income	19,583		18,914		19,318		24,698
Income from operations before income taxes	18,139		17,577		17,704		16,923
Net income	11,478		11,371		11,382		10,012
Basic earnings per share	0.14		0.14		0.14		0.12
Diluted earnings per share	0.14		0.14		0.14		0.12

(a) Included in net income in the fourth quarter of fiscal 2010 are costs incurred as part of the Griffin Transaction for consulting, legal and financing in the amount of approximately $13.7 million.