Quarterly Data (Unaudited) (Tables)

12 Months Ended

Dec. 29, 2018

Quarterly Financial Information Disclosure [Abstract]

Schedule of Quarterly Financial Information

	1st		2nd		3rd		4th		Total Year
	(dollars in thousands, except per share data)
2018
Net sales	$	584,800	$	668,128	$	713,331	$	756,672	$	2,722,931
Gross profit	211,633		250,759		261,160		280,588		1,004,140
Income from operations	86,992		111,310		107,677		139,987		445,966
Net earnings	$	65,420	$	83,988	$	72,905	$	94,839	$	317,152
Basic earnings per share (1)	$	1.18	$	1.51	$	1.31	$	1.71	$	5.71
Diluted earnings per share (1)	$	1.18	$	1.51	$	1.31	$	1.70	$	5.70
2017
Net sales	$	530,297	$	579,343	$	593,043	$	632,859	$	2,335,542
Gross profit	209,450		234,608		228,519		240,164		912,741
Income from operations	92,741		113,524		109,444		62,904		378,613
Net earnings	$	70,702	$	77,569	$	74,671	$	75,186	$	298,128
Basic earnings per share (1)	$	1.24	$	1.35	$	1.31	$	1.35	$	5.26
Diluted earnings per share (1)	$	1.24	$	1.35	$	1.31	$	1.35	$	5.26

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