Goodwill And Intangible Assets (Schedule Of Intangible Assets Subject To Amortization) (Details) (USD $) In Thousands, unless otherwise specified	9 Months Ended	12 Months Ended
	Sep. 30, 2013	Dec. 31, 2012
Historical Cost	$ 247,350	$ 194,100
Accumulated Amortization	(83,350)	(61,596)
Net	164,000	132,504
Trade Names [Member]
Historical Cost	66,852	50,257
Accumulated Amortization	(9,812)	(6,227)
Net	57,040	44,030
Weighted-Average Amortization Period, years	17 years 1 month 6 days	17 years 8 months 12 days
Patents And Patent Licenses [Member]
Historical Cost	47,173	44,048
Accumulated Amortization	(28,470)	(24,719)
Net	18,703	19,329
Weighted-Average Amortization Period, years	7 years 9 months 18 days	8 years 2 months 12 days
Customer Relationships [Member]
Historical Cost	117,231	86,473
Accumulated Amortization	(33,208)	(21,750)
Net	84,023	64,723
Weighted-Average Amortization Period, years	7 years 1 month 6 days	7 years
Other Purchased Intangibles [Member]
Historical Cost	16,094	13,322
Accumulated Amortization	(11,860)	(8,900)
Net	$ 4,234	$ 4,422
Weighted-Average Amortization Period, years	4 years	4 years 4 months 24 days