Note 14 - Restructuring and Asset Impairment Charges (Details Textual) $ in Thousands	3 Months Ended	27 Months Ended
Apr. 02, 2017 USD ($)	Jan. 01, 2017 USD ($)	Apr. 01, 2018 USD ($)
Restructuring and Related Cost, Number of Positions Eliminated		70
Restructuring Charges, Total	$ 7,300	$ 19,800
Other Restructuring [Member]
Restructuring Charges, Total	3,400		$ 5,116
Fixed Asset Impairment [Member]
Restructuring Charges, Total	3,300		11,319
Employee Severance [Member]
Restructuring Charges, Total	$ 600		$ 10,652

Amount of expenses associated with exit or disposal activities pursuant to an authorized plan. Excludes expenses related to a discontinued operation or an asset retirement obligation.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
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Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
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Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
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Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
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-Section S99
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Data Type:	xbrli:monetaryItemType
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