CONDENSED CONSOLIDATED STATEMENTS OF NET INCOME - 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	$ 539,581	$ 391,566	$ 1,526,863	$ 1,044,999
Cost of sales	325,009	252,735	954,429	681,910
Gross profit	214,572	138,831	572,434	363,089
Selling, general, and administrative expenses	67,468	49,929	199,071	154,328
Research and development expenses	15,779	12,963	46,912	40,587
Amortization of intangibles	10,446	10,104	31,608	29,912
Restructuring, impairment, and other charges	772	1,277	1,998	40,904
Total operating expenses	94,465	74,273	279,589	265,731
Operating income	120,107	64,558	292,845	97,358
Interest expense	4,602	4,988	13,901	16,261
Foreign exchange loss (gain)	3,154	(6,174)	8,315	(9,600)
Other income, net	(1,240)	(1,682)	(10,867)	(1,643)
Income before income taxes	113,591	67,426	281,496	92,340
Income taxes	21,537	12,070	49,634	21,331
Net income	$ 92,054	$ 55,356	$ 231,862	$ 71,009
Earnings per share:
Basic (in dollars per share)	$ 3.74	$ 2.27	$ 9.43	$ 2.92
Diluted (in dollars per share)	$ 3.69	$ 2.25	$ 9.31	$ 2.89
Weighted-average shares and equivalent shares outstanding:
Basic (in shares)	24,622	24,357	24,582	24,354
Diluted (in shares)	24,926	24,573	24,904	24,535