Segment Information - Operating Segments (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 04, 2021	Jul. 05, 2020	Jul. 04, 2021	Jul. 05, 2020
Segment Reporting Information [Line Items]
Net sales	$ 294,785	$ 259,504	$ 548,045	$ 547,673
Depreciation and amortization	11,736	10,808	23,670	21,748
Operating Segments | AMS
Segment Reporting Information [Line Items]
Net sales	156,665	151,222	283,632	309,313
AOI	21,098	23,942	33,011	47,492
Depreciation and amortization	4,504	3,966	9,227	7,873
Operating Segments | EAAA
Segment Reporting Information [Line Items]
Net sales	138,120	108,282	264,413	238,360
AOI	9,960	3,530	17,971	9,330
Depreciation and amortization	$ 7,232	$ 6,842	$ 14,443	$ 13,875