Segment Information - Operating Segments (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 05, 2020	Jun. 30, 2019	Jul. 05, 2020	Jun. 30, 2019	Dec. 29, 2019
Segment Reporting Information [Line Items]
Net Sales	$ 259,504	$ 357,507	$ 547,673	$ 655,195
Depreciation and amortization	10,808	11,354	21,748	22,698
Total assets	1,300,968		1,300,968		$ 1,423,049
Operating Segments
Segment Reporting Information [Line Items]
Net Sales	259,504	357,507	547,673	655,195
Depreciation and amortization	9,345	10,059	18,864	20,122
Total assets	1,394,599		1,394,599
AMERICAS | Operating Segments
Segment Reporting Information [Line Items]
Net Sales	151,222	207,250	309,313	367,876
Depreciation and amortization	3,009	3,300	6,069	6,551
Total assets	685,080		685,080
EUROPE | Operating Segments
Segment Reporting Information [Line Items]
Net Sales	71,874	95,665	166,564	188,715
Depreciation and amortization	4,417	4,651	8,858	9,331
Total assets	536,782		536,782
ASIA- PACIFIC | Operating Segments
Segment Reporting Information [Line Items]
Net Sales	36,408	54,592	71,796	98,604
Depreciation and amortization	1,919	$ 2,108	3,937	$ 4,240
Total assets	$ 172,737		$ 172,737