Note 15 - Business Unit Segment Information - Business Unit Segment Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Jan. 02, 2016	Dec. 27, 2014	Dec. 28, 2013
Electronics [Member]
Net sales	$ 405,497	$ 410,065	$ 367,052
Depreciation and amortization	22,936	22,177	20,735
Operating income	78,194	86,981	69,559
Automotive [Member]
Net sales	339,957	325,415	267,207
Depreciation and amortization	13,437	14,204	9,928
Operating income	53,086	45,086	39,170
Industrial [Member]
Net sales	122,410	116,515	123,594
Depreciation and amortization	5,268	5,494	3,817
Operating income	18,094	10,674	24,363
Other Segments [Member]
Operating income	(45,217)	(8,911)	(3,211)
Net sales	867,864	851,995	757,853
Depreciation and amortization	41,641	41,875	34,480
Operating income	104,157	133,830	129,881
Interest expense	$ 4,091	$ 4,903	2,917
Impairment and equity in net loss of unconsolidated affiliate (2)			10,678
Foreign exchange loss (gain)	$ 1,465	$ (3,925)	3,303
Other expense (income), net	5,417	6,644	4,646
Income before income taxes	$ 106,948	$ 131,646	$ 124,236