Note 7 - Fair Value of Assets and Liabilities - Impairment of Assets (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 30, 2017	Dec. 31, 2016	Jan. 02, 2016
Goodwill, impairment charge	[1]		$ 8,794
Goodwill		$ 453,414	403,544	$ 189,767
Other intangible assets		203,850	213,026
Impairment of goodwill and intangible assets			14,809
Industrial [Member]
Goodwill, impairment charge			8,794
Goodwill		$ 38,626	43,194	$ 51,259
Industrial [Member] | Custom Products Reporting Unit [Member]
Goodwill, impairment charge			8,794
Goodwill			0
Other intangible assets, impairment charge			6,015
Other intangible assets			660
Impairment of goodwill and intangible assets			14,809
Total			660
Industrial [Member] | Custom Products Reporting Unit [Member] | Fair Value, Inputs, Level 3 [Member]
Goodwill
Other intangible assets			680
Total			$ 680

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