Restructuring, Impairment and Other Charges (Details) - USD ($) $ in Thousands	1 Months Ended	3 Months Ended		9 Months Ended
	Apr. 30, 2019	Sep. 28, 2019	Sep. 29, 2018	Sep. 28, 2019	Sep. 29, 2018	Dec. 29, 2018
Restructuring Cost and Reserve [Line Items]
Total restructuring charges		$ 2,215	$ 4,982	$ 10,633	$ 8,895
Impairment charges		322	0	322	1,125
Restructuring costs		2,537	4,982	10,955	10,020
Restructuring reserves		2,300		2,300		$ 3,900
Employee terminations
Restructuring Cost and Reserve [Line Items]
Total restructuring charges	$ 1,700	813	4,816	8,878	8,059
Other restructuring charges
Restructuring Cost and Reserve [Line Items]
Total restructuring charges	$ 1,100	1,402	166	1,755	836
Electronics
Restructuring Cost and Reserve [Line Items]
Total restructuring charges		783	4,614	4,294	8,363
Impairment charges		0	0	0	0
Restructuring costs		783	4,614	4,294	8,363
Electronics | Employee terminations
Restructuring Cost and Reserve [Line Items]
Total restructuring charges		655	4,614	4,153	7,693
Electronics | Other restructuring charges
Restructuring Cost and Reserve [Line Items]
Total restructuring charges		128	0	141	670
Automotive
Restructuring Cost and Reserve [Line Items]
Total restructuring charges		1,259	368	5,195	467
Impairment charges		322	0	322	88
Restructuring costs		1,581	368	5,517	555
Automotive | Employee terminations
Restructuring Cost and Reserve [Line Items]
Total restructuring charges		109	202	3,955	301
Automotive | Other restructuring charges
Restructuring Cost and Reserve [Line Items]
Total restructuring charges		1,150	166	1,240	166
Industrial
Restructuring Cost and Reserve [Line Items]
Total restructuring charges		173	0	1,144	65
Impairment charges		0	0	0	1,037
Restructuring costs		173	0	1,144	1,102
Industrial | Employee terminations
Restructuring Cost and Reserve [Line Items]
Total restructuring charges		49	0	770	65
Industrial | Other restructuring charges
Restructuring Cost and Reserve [Line Items]
Total restructuring charges		$ 124	$ 0	$ 374	$ 0