Note 4 - Goodwill and Other Intangible Assets (Details) - Details of Other Intangible Assets and Related Future Amortization Expense (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 27, 2014		Dec. 28, 2013
Finite-Lived Intangible Assets [Line Items]
Weighted Average Useful Life	12 years 6 months		11 years 292 days
Gross Carrying Value	$ 194,505		$ 179,611
Accumulated Amortization	90,832		81,254
Trade Names [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	5,030	[1]	5,489	[1]
Accumulated Amortization		[1]		[1]
Patents Licenses And Software [Member]
Finite-Lived Intangible Assets [Line Items]
Weighted Average Useful Life	11 years 255 days	[2]	11 years	[2]
Gross Carrying Value	62,378	[2]	63,026	[2]
Accumulated Amortization	38,738	[2]	37,860	[2]
Distribution Rights [Member]
Finite-Lived Intangible Assets [Line Items]
Weighted Average Useful Life	12 years 146 days	[2]	12 years 109 days	[2]
Gross Carrying Value	46,850	[2]	47,637	[2]
Accumulated Amortization	27,422	[2]	24,867	[2]
Customer Lists Trademarks And Tradenames [Member]
Finite-Lived Intangible Assets [Line Items]
Weighted Average Useful Life	13 years 73 days	[2]	12 years 109 days	[2]
Gross Carrying Value	80,247	[2]	63,459	[2]
Accumulated Amortization	$ 24,672	[2]	$ 18,527	[2]

[1] Tradenames with indefinite lives.

[2] Increase to gross carrying value in 2014 is primarily related to the preliminary SymCom acquisition purchase price allocation discussed in Note 2. Other changes are primarily due to the impact of foreign currency translation adjustments.