Quarterly Data (Unaudited) (Tables)

12 Months Ended

Dec. 28, 2013

Quarterly Financial Information Disclosure [Abstract]

Schedule of Quarterly Financial Information

	1st		2nd		3rd		4th		Total Year
	(dollars in thousands, except per share data)
2013
Net sales	$	327,451	$	363,801	$	360,013	$	377,420	$	1,428,685
Gross profit	121,268		136,574		141,438		150,731		550,011
Income from operations	42,195		60,325		67,488		74,454		244,462
Net earnings	$	25,902	$	37,163	$	40,942	$	49,921	$	153,928
Basic earnings per share (1)	$	1.41	$	2.00	$	2.19	$	2.66	$	8.27
Diluted earnings per share (1)	$	1.39	$	2.00	$	2.18	$	2.62	$	8.21
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

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