Goodwill And Related Intangible Assets (Schedule Of Acquired Intangible Assets) (Details) (USD $) In Thousands, unless otherwise specified													12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2013 Trademarks [Member]	Dec. 31, 2012 Trademarks [Member]	Dec. 31, 2013 Unpatented Technology And Patents [Member]	Dec. 31, 2012 Unpatented Technology And Patents [Member]	Dec. 31, 2013 Customer Relationships [Member]	Dec. 31, 2012 Customer Relationships [Member]	Dec. 31, 2013 Non-Compete Agreements [Member]	Dec. 31, 2012 Non-Compete Agreements [Member]	Dec. 31, 2013 Backlog [Member]	Dec. 31, 2012 Backlog [Member]	Dec. 31, 2013 Maximum [Member] Trademarks [Member]	Dec. 31, 2013 Maximum [Member] Unpatented Technology And Patents [Member]	Dec. 31, 2013 Maximum [Member] Customer Relationships [Member]	Dec. 31, 2013 Maximum [Member] Non-Compete Agreements [Member]	Dec. 31, 2013 Maximum [Member] Backlog [Member]	Dec. 31, 2013 Minimum [Member] Trademarks [Member]	Dec. 31, 2013 Minimum [Member] Unpatented Technology And Patents [Member]	Dec. 31, 2013 Minimum [Member] Customer Relationships [Member]	Dec. 31, 2013 Minimum [Member] Non-Compete Agreements [Member]	Dec. 31, 2013 Minimum [Member] Backlog [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount, Indefinite-lived intangible assets			$ 45,724	$ 48,774
Gross Carrying Amount, Finite-lived intangible assets	86,117	84,778	3,989	2,771	24,690	24,427	54,171	53,043	1,937	3,207	1,330	1,330
Total acquired intangible assets, Gross Carrying Amount	131,841	133,552
Accumulated Amortization, Indefinite-lived intangible assets
Accumulated Amortization, Finite-lived intangible assets	40,064	34,793	1,420	1,085	6,980	5,204	28,926	24,687	1,408	2,598	1,330	1,219
Total acquired intangible assets, Accumulated Amortization	$ 40,064	$ 34,793
Estimated Useful Life													15 years	20 years	16 years	10 years	2 years	2 years	5 years	5 years	4 years	1 year