Acquisitions (Schedule Of Acquired Intangible Assets) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2011 years
Business Acquisition [Line Items]
Fair Value	$ 35,401
Unpatented Technology And Patents [Member]
Business Acquisition [Line Items]
Fair Value	16,560
Estimated Useful Life, years	15
Trademarks [Member]
Business Acquisition [Line Items]
Fair Value	11,470
Customer Relationships [Member]
Business Acquisition [Line Items]
Fair Value	5,970
Estimated Useful Life, years	16
Backlog [Member]
Business Acquisition [Line Items]
Fair Value	1,200
Estimated Useful Life, years	1.5
Non-Compete Agreements [Member]
Business Acquisition [Line Items]
Fair Value	$ 201
Estimated Useful Life, years	4