Note 10 - Business Unit Segment Information (Details) - Business Unit Segment Information (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 28, 2015		Mar. 29, 2014
Net sales
Net sales	$ 210,313	[1]	$ 206,859	[1]
Depreciation and amortization
Depreciation and amortization	10,418		10,166
Operating income
Operating income	29,548		33,590
Interest expense	1,151		1,216
Foreign exchange loss (gain)	3,117		(252)
Other (income) expense, net	(1,126)		(1,186)
Income before income taxes	26,406		33,812
Electronics [Member]
Net sales
Net sales	99,380		95,722
Depreciation and amortization
Depreciation and amortization	5,798		5,370
Operating income
Operating income	18,665		19,068
Automotive [Member]
Net sales
Net sales	84,071		82,419
Depreciation and amortization
Depreciation and amortization	3,336		3,528
Operating income
Operating income	11,171		11,899
Electrical [Member]
Net sales
Net sales	26,862		28,718
Depreciation and amortization
Depreciation and amortization	1,284		1,268
Operating income
Operating income	2,730		4,032
Other Segments [Member]
Operating income
Operating income	$ (3,018)	[2]	$ (1,409)	[2]

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

[2] "Other" consists of restructuring costs ($2.2 million), acquisition expenses ($0.2 million) and pension wind-up costs ($0.7 million).