Note 10 - Business Unit Segment Information - Business Unit Segment Information (Details) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 27, 2015	Jun. 28, 2014	Jun. 27, 2015	Jun. 28, 2014
Electronics [Member]
Net sales
Net Sales		$ 105,553	$ 109,947	$ 204,933	$ 205,972
Depreciation and amortization
Depreciation and amortization		5,775	5,530	11,573	10,900
Operating income (loss)
Operating income		22,167	25,634	40,832	45,005
Automotive [Member]
Net sales
Net Sales		85,918	82,042	169,989	164,444
Depreciation and amortization
Depreciation and amortization		3,303	3,646	6,639	7,174
Operating income (loss)
Operating income		12,699	11,049	23,870	22,931
Electrical [Member]
Net sales
Net Sales		30,550	28,919	57,412	57,351
Depreciation and amortization
Depreciation and amortization		1,295	1,414	2,579	2,682
Operating income (loss)
Operating income		4,709	571	7,439	4,317
Other Segments [Member]
Operating income (loss)
Operating income	[1]	(3,404)	(3,535)	(6,422)	(4,944)
Net Sales	[2]	222,021	220,908	432,334	427,767
Depreciation and amortization		10,373	10,590	20,791	20,756
Operating income		36,171	33,719	65,719	67,309
Interest expense		948	1,228	2,099	2,444
Foreign exchange (gain) loss		(1,292)	2,375	1,825	2,123
Other (income) expense, net		(1,202)	(1,446)	(2,328)	(2,632)
Income before income taxes		$ 37,717	$ 31,562	$ 64,123	$ 65,374

[1] For the three months ended June 27, 2015, “Other” consists of restructuring costs ($2.5 million), acquisition expenses ($0.2 million) and pension wind-up costs ($0.7 million). For the six months ended June 27, 2015, “Other” consist of restructuring costs ($4.8 million), acquisition expenses ($0.3 million) and pension wind-up costs ($1.3 million).

[2] Sales by country represent sales to customer or distributor locations.