Quarterly Data (Unaudited) (Tables)

12 Months Ended

Dec. 29, 2012

Quarterly Financial Information Disclosure [Abstract]

Schedule of Quarterly Financial Information

	1st		2nd		3rd		4th		Total Year
	(dollars in thousands, except per share data)
2012
Net sales	$	228,823	$	260,040	$	257,699	$	291,612	$	1,038,174
Gross profit	87,483		101,816		100,445		113,245		402,989
Income from operations	36,660		45,338		47,429		58,657		188,084
Net earnings	$	22,095	$	31,045	$	29,769	$	37,788	$	120,697
Basic earnings per share (1)	$	1.22	$	1.70	$	1.63	$	2.06	$	6.61
Diluted earnings per share (1)	$	1.20	$	1.67	$	1.60	$	2.03	$	6.49
2011
Net sales	$	182,572	$	210,855	$	218,720	$	243,760	$	855,907
Gross profit	71,830		85,337		87,318		99,652		344,137
Income from operations	31,364		35,248		37,186		44,912		148,710
Net earnings	$	17,825	$	19,628	$	23,461	$	34,559	$	95,473
Basic earnings per share (1)	$	1.00	$	1.09	$	1.30	$	1.92	$	5.30
Diluted earnings per share (1)	$	0.97	$	1.06	$	1.26	$	1.87	$	5.15

(1) Sum of quarters may not equal the total for the year due to changes in the number of shares outstanding during the year.