Note 10 - Segment Information - Segment Information (Details) - USD ($) $ in Thousands	3 Months Ended
	Apr. 01, 2017	Apr. 02, 2016
Net sales	$ 285,441	$ 219,398
Depreciation and amortization	15,072	11,026
Operating income	48,852	32,428
Interest expense	3,120	2,045
Foreign exchange loss (gain)	(1,557)	3,823
Other expense (income), net	(139)	(517)
Income before income taxes	47,428	27,077
Electronics [Member]
Net sales	153,767	98,796
Depreciation and amortization	8,387	5,372
Operating income	35,206	22,416
Automotive [Member]
Net sales	107,839	91,933
Depreciation and amortization	5,371	3,266
Operating income	15,065	17,491
Industrial [Member]
Net sales	23,835	28,669
Depreciation and amortization	1,314	1,451
Operating income	106	1,673
Other Segments [Member]
Depreciation and amortization		937
Operating income	$ (1,525)	$ (9,152)