CONDENSED CONSOLIDATED STATEMENTS OF NET INCOME - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 27, 2021	Mar. 28, 2020
Income Statement [Abstract]
Net sales	$ 463,794	$ 346,096
Cost of sales	303,328	221,740
Gross profit	160,466	124,356
Selling, general, and administrative expenses	58,288	51,200
Research and development expenses	14,739	14,463
Amortization of intangibles	10,521	9,981
Restructuring, impairment, and other charges	437	3,962
Total operating expenses	83,985	79,606
Operating income	76,481	44,750
Interest expense	4,673	5,418
Foreign exchange loss	6,837	2,584
Other (income) expense, net	(7,737)	1,249
Income before income taxes	72,708	35,499
Income taxes	14,995	10,855
Net income	$ 57,713	$ 24,644
Earnings per share:
Basic (in dollars per share)	$ 2.35	$ 1.01
Diluted (in dollars per share)	$ 2.32	$ 1.00
Weighted-average shares and equivalent shares outstanding:
Basic (in shares)	24,532	24,393
Diluted (in shares)	24,892	24,578