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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.

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- Definition Amount after amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 + Details
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- Definition Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6388280&loc=d3e13770-109266 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 45 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=77989000&loc=SL49117168-202975 + Details
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