Quarterly Financial Data (Tables)

12 Months Ended

Dec. 29, 2012

Quarterly Financial Information Disclosure [Abstract]

Schedule of Quarterly Financial Information [Table Text Block]

	Year Ended December 29, 2012
	First  Quarter		Second  Quarter		Third  Quarter		Fourth  Quarter
Net sales	$	387,108	$	436,674	$	452,732	$	424,915
Operating income	52,510		63,968		65,776		49,487
Income from operations before income taxes	44,741		57,829		59,307		44,908
Net income	28,571		36,225		37,172		28,802
Basic earnings per share	0.24		0.31		0.32		0.24
Diluted earnings per share	0.24		0.31		0.31		0.24

	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	88,173		92,259		74,553		58,999
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