CONDENSED CONSOLIDATED STATEMENTS OF NET INCOME (LOSS) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 26, 2021	Jun. 27, 2020	Jun. 26, 2021	Jun. 27, 2020
Income Statement [Abstract]
Net sales	$ 523,488	$ 307,337	$ 987,282	$ 653,433
Cost of sales	326,092	207,435	629,420	429,175
Gross profit	197,396	99,902	357,862	224,258
Selling, general, and administrative expenses	73,315	53,199	131,603	104,399
Research and development expenses	16,394	13,161	31,133	27,624
Amortization of intangibles	10,641	9,827	21,162	19,808
Restructuring, impairment, and other charges	789	35,665	1,226	39,627
Total operating expenses	101,139	111,852	185,124	191,458
Operating income (loss)	96,257	(11,950)	172,738	32,800
Interest expense	4,626	5,855	9,299	11,273
Foreign exchange (gain) loss	(1,676)	(6,010)	5,161	(3,426)
Other (income) expense, net	(1,890)	(1,210)	(9,627)	39
Income (loss) before income taxes	95,197	(10,585)	167,905	24,914
Income taxes	13,102	(1,594)	28,097	9,261
Net income (loss)	$ 82,095	$ (8,991)	$ 139,808	$ 15,653
Earnings (loss) per share:
Basic (in dollars per share)	$ 3.34	$ (0.37)	$ 5.69	$ 0.64
Diluted (in dollars per share)	$ 3.30	$ (0.37)	$ 5.62	$ 0.64
Weighted-average shares and equivalent shares outstanding:
Basic (in shares)	24,592	24,312	24,562	24,353
Diluted (in shares)	24,900	24,312	24,894	24,520