Summary of Significant Accounting Policies and Other Information - Revenue Disaggregation (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
Disaggregation of Revenue
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
Electronics – Semiconductor
Disaggregation of Revenue
Net sales									522,352	539,820
Electronics – Passive Products and Sensors
Disaggregation of Revenue
Net sales									415,410	421,260
Passenger Car Products
Disaggregation of Revenue
Net sales									200,455	218,560
Commercial Vehicle Products
Disaggregation of Revenue
Net sales									101,324	111,972
Automotive Sensors
Disaggregation of Revenue
Net sales									93,985	98,001
Industrial Products
Disaggregation of Revenue
Net sales									112,169	114,260
Electronics Segment
Disaggregation of Revenue
Net sales									937,762	961,080	1,124,296
Electronics Segment | Electronics – Semiconductor
Disaggregation of Revenue
Net sales									522,352	539,820
Electronics Segment | Electronics – Passive Products and Sensors
Disaggregation of Revenue
Net sales									415,410	421,260
Electronics Segment | Passenger Car Products
Disaggregation of Revenue
Net sales									0	0
Electronics Segment | Commercial Vehicle Products
Disaggregation of Revenue
Net sales									0	0
Electronics Segment | Automotive Sensors
Disaggregation of Revenue
Net sales									0	0
Electronics Segment | Industrial Products
Disaggregation of Revenue
Net sales									0	0
Automotive Segment
Disaggregation of Revenue
Net sales									395,764	428,533	479,791
Automotive Segment | Electronics – Semiconductor
Disaggregation of Revenue
Net sales									0	0
Automotive Segment | Electronics – Passive Products and Sensors
Disaggregation of Revenue
Net sales									0	0
Automotive Segment | Passenger Car Products
Disaggregation of Revenue
Net sales									200,455	218,560
Automotive Segment | Commercial Vehicle Products
Disaggregation of Revenue
Net sales									101,324	111,972
Automotive Segment | Automotive Sensors
Disaggregation of Revenue
Net sales									93,985	98,001
Automotive Segment | Industrial Products
Disaggregation of Revenue
Net sales									0	0
Industrial Segment
Disaggregation of Revenue
Net sales									112,169	114,260	$ 114,381
Industrial Segment | Electronics – Semiconductor
Disaggregation of Revenue
Net sales									0	0
Industrial Segment | Electronics – Passive Products and Sensors
Disaggregation of Revenue
Net sales									0	0
Industrial Segment | Passenger Car Products
Disaggregation of Revenue
Net sales									0	0
Industrial Segment | Commercial Vehicle Products
Disaggregation of Revenue
Net sales									0	0
Industrial Segment | Automotive Sensors
Disaggregation of Revenue
Net sales									0	0
Industrial Segment | Industrial Products
Disaggregation of Revenue
Net sales									$ 112,169	$ 114,260