Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 29, 2018	Dec. 30, 2017	Dec. 31, 2016
Income Statement [Abstract]
Net sales	$ 973,705	$ 903,221	$ 859,604
Cost of goods sold	600,424	544,572	521,530
Gross profit	373,281	358,649	338,074
Selling, general and administrative expenses	202,138	182,409	169,473
Income from operations	171,143	176,240	168,601
Other (expense) income, net	(8)	348	(241)
Income before income taxes	171,135	176,588	168,360
Provision for income taxes	37,533	69,989	62,311
Net income	$ 133,602	$ 106,599	$ 106,049
Earnings per share:
Basic	$ 4.04	$ 3.14	$ 3.07
Diluted	$ 4.02	$ 3.13	$ 3.07
Weighted average shares outstanding:
Basic	33,097	33,964	34,516
Diluted	33,207	34,052	34,598