Segment Information - Revenues and Long-lived Assets by Geographical Area (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 26, 2020	Sep. 26, 2020	Jun. 27, 2020	Mar. 28, 2020	Dec. 28, 2019	Sep. 28, 2019	Jun. 29, 2019	Mar. 30, 2019	Dec. 26, 2020	Dec. 28, 2019	Dec. 29, 2018
Segment Reporting Information
Net sales	$ 400,696	$ 391,566	$ 307,337	$ 346,096	$ 338,523	$ 361,971	$ 397,879	$ 405,500	$ 1,445,695	$ 1,503,873	$ 1,718,468
Long-lived assets	344,178				344,617				344,178	344,617	339,894
Additions to long-lived assets									51,208	66,366	74,753
United States
Segment Reporting Information
Net sales									392,544	440,461	511,544
Long-lived assets	46,132				58,081				46,132	58,081	58,691
Additions to long-lived assets									4,170	5,864	5,567
China
Segment Reporting Information
Net sales									438,000	416,385	468,174
Long-lived assets	85,876				88,306				85,876	88,306	95,806
Additions to long-lived assets									10,074	10,400	29,286
Mexico
Segment Reporting Information
Long-lived assets	70,125				73,096				70,125	73,096	70,495
Additions to long-lived assets									9,977	13,827	18,723
Germany
Segment Reporting Information
Long-lived assets	37,976				36,025				37,976	36,025	36,548
Additions to long-lived assets									5,600	4,017	5,208
Philippines
Segment Reporting Information
Long-lived assets	66,994				51,738				66,994	51,738	32,459
Additions to long-lived assets									19,612	22,944	7,605
Other countries
Segment Reporting Information
Net sales									615,151	647,027	738,750
Long-lived assets	$ 37,075				$ 37,371				37,075	37,371	45,895
Additions to long-lived assets									$ 1,775	$ 9,314	$ 8,364