Segment Information - Revenues and Long-lived Assets by Geographical Area (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 28, 2020	Mar. 30, 2019	Dec. 28, 2019
Segment Reporting Information [Line Items]
Net sales	$ 346,096	$ 405,500
Long-lived assets	334,829		$ 344,617
Additions to long-lived assets	11,308	14,076
United States
Segment Reporting Information [Line Items]
Net sales	102,910	119,528
Long-lived assets	54,870		58,081
Additions to long-lived assets	580	905
China
Segment Reporting Information [Line Items]
Net sales	86,015	106,866
Long-lived assets	83,830		88,306
Additions to long-lived assets	1,657	1,225
Mexico
Segment Reporting Information [Line Items]
Long-lived assets	69,664		73,096
Additions to long-lived assets	2,592	5,484
Germany
Segment Reporting Information [Line Items]
Long-lived assets	35,483		36,025
Additions to long-lived assets	753	598
Philippines
Segment Reporting Information [Line Items]
Long-lived assets	55,347		51,738
Additions to long-lived assets	3,218	5,229
Other countries
Segment Reporting Information [Line Items]
Net sales	157,171	179,106
Long-lived assets	35,635		$ 37,371
Additions to long-lived assets	$ 2,508	$ 635