Goodwill And Other Intangible Assets (Components Of Intangible Assets) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 25, 2012 Y	Dec. 25, 2011
Finite-Lived Intangible Assets [Line Items]
Total amortized finite-lived intangible assets, Gross Amount	$ 180,535	$ 178,764
Total identifiable intangible assets, Gross Amount	202,045	200,273
Amortized finite-lived intangible assets, Gross Accumulated Amortization	119,750	115,716
Total identifiable assets accumulated amortization	119,750	115,716
Customer Lists [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, Amortizable Life Minimum (years)	6
Finite-lived intangible assets, Amortizable Life Maximum (years)	20
Finite-lived customer lists, Gross Amount	82,023	81,348
Amortized finite-lived intangible assets, Gross Accumulated Amortization	45,936	43,945
Trade Name [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, Amortizable Life Minimum (years)	1
Finite-lived intangible assets, Amortizable Life Maximum (years)	30
Finite-lived trade name, Gross Amount	30,518	30,007
Indefinite-lived trade names, Gross Amount	21,510	21,509
Amortized finite-lived intangible assets, Gross Accumulated Amortization	18,701	18,237
Patents, License Agreements [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, Amortizable Life Minimum (years)	3
Finite-lived intangible assets, Amortizable Life Maximum (years)	14
Finite-lived patents, license agreements, Gross Amount	60,821	60,249
Amortized finite-lived intangible assets, Gross Accumulated Amortization	48,928	47,704
Other Intangibles [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, Amortizable Life Minimum (years)	2
Finite-lived intangible assets, Amortizable Life Maximum (years)	6
Finite-lived other intangibles, Gross Amount	7,173	7,160
Amortized finite-lived intangible assets, Gross Accumulated Amortization	$ 6,185	$ 5,830