Segment Information - Revenues and Long-lived Assets by Geographical Area (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 27, 2021	Mar. 28, 2020	Dec. 26, 2020
Segment Reporting Information
Net sales	$ 463,794	$ 346,096
Long-lived assets	344,914		$ 344,178
Additions to long-lived assets	12,736	11,308
United States
Segment Reporting Information
Net sales	130,931	102,910
Long-lived assets	48,908		46,132
Additions to long-lived assets	683	580
China
Segment Reporting Information
Net sales	139,158	86,015
Long-lived assets	85,280		85,876
Additions to long-lived assets	2,142	1,657
Mexico
Segment Reporting Information
Long-lived assets	72,499		70,125
Additions to long-lived assets	6,121	2,592
Germany
Segment Reporting Information
Long-lived assets	36,227		37,976
Additions to long-lived assets	593	753
Philippines
Segment Reporting Information
Long-lived assets	66,956		66,994
Additions to long-lived assets	2,443	3,218
Other countries
Segment Reporting Information
Net sales	193,705	157,171
Long-lived assets	35,044		$ 37,075
Additions to long-lived assets	$ 754	$ 2,508