Goodwill And Other Intangible Assets (Components Of Intangible Assets) (Details) (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 24, 2012 Y	Dec. 25, 2011
Finite-Lived Intangible Assets [Line Items]
Total amortized finite-lived intangible assets, Gross Amount	$ 175,629	$ 178,764
Total identifiable intangible assets, Gross Amount	197,135	200,273
Amortized finite-lived intangible assets, Gross Accumulated Amortization	118,293	115,716
Total identifiable assets accumulated amortization	118,293	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	80,250	81,348
Amortized finite-lived intangible assets, Gross Accumulated Amortization	45,978	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	29,095	30,007
Indefinite-lived trade names, Gross Amount	21,506	21,509
Amortized finite-lived intangible assets, Gross Accumulated Amortization	18,029	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	59,134	60,249
Amortized finite-lived intangible assets, Gross Accumulated Amortization	47,782	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	7,150	7,160
Amortized finite-lived intangible assets, Gross Accumulated Amortization	$ 6,504	$ 5,830