Note 14 - Fair Value Measurements (Details Textual) - USD ($) $ in Thousands	1 Months Ended	6 Months Ended
Jun. 29, 2017	Jun. 03, 2017	May 28, 2016	Dec. 03, 2016
Long-term Debt, Fair Value		$ 791,936		$ 693,283
Business Combination, Contingent Consideration Arrangements, Change in Amount of Contingent Consideration, Liability		$ (3,603)	$ (891)
Subsequent Event [Member]
Business Combination, Contingent Consideration Arrangements, Change in Amount of Contingent Consideration, Liability	$ 1,100

Amount of increase (decrease) in the value of a contingent consideration liability, including, but not limited to, differences arising upon settlement.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 30
-Section 50
-Paragraph 4
-Subparagraph (a)(1)
-URI http://asc.fasb.org/extlink&oid=35744584&loc=d3e7008-128479

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration