Note 4 - Goodwill and Other Intangible Assets (Details Textual) - USD ($) $ in Thousands		12 Months Ended
		Dec. 30, 2017	Dec. 31, 2016	Jan. 02, 2016
Goodwill, Impairment Loss	[1]		$ 8,794
Impairment of Intangible Assets, Finite-lived			6,000
Finite-lived Intangible Assets Acquired		$ 11,030	144,368
Amortization of Intangible Assets		24,700	19,337	$ 11,898
Industrial [Member]
Goodwill, Impairment Loss			8,794
Goodwill Error Correction Adjustments		(4,800)
Industrial [Member] | Customer Relationships [Member]
Impairment of Intangible Assets, Finite-lived			2,200
Industrial [Member] | Trade Names [Member]
Impairment of Intangible Assets, Finite-lived			3,800
Electronics [Member]
Goodwill, Impairment Loss	[1]
Goodwill Error Correction Adjustments		21,600
Automotive [Member]
Goodwill, Impairment Loss	[1]
Goodwill Error Correction Adjustments		$ (16,800)

[1] The 2016 impairments in the Industrial segment was due to the $8.8 million impairment of Custom Products reporting unit goodwill.