Segment Information - Segment Information (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 29, 2018	Sep. 30, 2017	Sep. 29, 2018	Sep. 30, 2017
Segment Reporting Information [Line Items]
Net sales	$ 439,191	$ 317,889	$ 1,316,187	$ 916,685
Depreciation and amortization	26,258	15,946	76,060	46,634
Operating income (loss)	76,228	58,609	173,421	167,731
Interest expense	5,775	3,467	16,980	9,868
Foreign exchange loss (gain)	982	632	(6,372)	(1,483)
Other expense (income), net	1,259	(1,013)	(2,362)	(962)
Income before income taxes	68,212	55,523	165,175	160,308
Electronics
Segment Reporting Information [Line Items]
Net sales	296,472	175,899	860,240	499,052
Depreciation and amortization	15,898	8,986	45,227	26,080
Operating income (loss)	72,464	44,345	193,739	122,518
Automotive
Segment Reporting Information [Line Items]
Net sales	114,416	113,797	367,718	338,094
Depreciation and amortization	5,891	5,622	17,830	16,572
Operating income (loss)	10,863	16,821	44,965	47,599
Industrial
Segment Reporting Information [Line Items]
Net sales	28,303	28,193	88,229	79,539
Depreciation and amortization	1,364	1,338	4,291	3,982
Operating income (loss)	4,134	3,757	14,123	5,769
Other
Segment Reporting Information [Line Items]
Depreciation and amortization	3,105	0	8,712	0
Operating income (loss)	$ (11,233)	$ (6,314)	$ (79,406)	$ (8,155)