Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Jan. 01, 2022	Jan. 02, 2021	Dec. 28, 2019
Income Statement [Abstract]
Net sales	$ 869,185	$ 523,040	$ 554,665
Cost of sales	556,380	326,812	342,383
Gross profit	312,805	196,228	212,282
Selling, engineering and administrative expenses	130,685	106,831	99,665
Restructuring charges	0	0	1,724
Amortization of intangible assets	32,811	22,114	18,065
Goodwill impairment	0	31,871	0
Loss on disposal of intangible asset	0	0	2,713
Operating income	149,309	35,412	90,115
Interest expense, net	16,871	13,286	15,387
Foreign currency transaction loss (gain), net	970	(1,555)	(846)
Other non-operating expense (income), net	289	(366)	267
Income before income taxes	131,179	24,047	75,307
Income tax provision	26,583	9,829	15,039
Net income	$ 104,596	$ 14,218	$ 60,268
Net income per share:
Basic	$ 3.24	$ 0.44	$ 1.88
Diluted	$ 3.22	$ 0.44	$ 1.88
Weighted average shares outstanding:
Basic	32,304	32,088	32,015
Diluted	32,475	32,210	32,109
Dividends declared per share	$ 0.36	$ 0.36	$ 0.36