Condensed Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 25, 2021	Sep. 26, 2020	Sep. 25, 2021	Sep. 26, 2020
Income Statement [Abstract]
Net sales	$ 348,426	$ 300,620	$ 947,073	$ 791,532
Cost of goods sold	231,572	192,819	615,574	519,786
Gross profit	116,854	107,801	331,499	271,746
Selling, general and administrative expenses	72,663	63,028	205,049	184,288
Income from operations	44,191	44,773	126,450	87,458
Interest expense, net	733	63	918	545
Other income, net	(95)	(46)	(334)	(2,862)
Income before income taxes	43,553	44,756	125,866	89,775
Provision for income taxes	10,449	10,497	28,414	18,856
Net income	$ 33,104	$ 34,259	$ 97,452	$ 70,919
Earnings per share:
Basic	$ 1.04	$ 1.06	$ 3.06	$ 2.19
Diluted	$ 1.04	$ 1.06	$ 3.04	$ 2.19
Weighted average shares outstanding:
Basic	31,692	32,281	31,895	32,317
Diluted	31,842	32,371	32,039	32,394