Fair Value Measurements (Schedule Of Change In Estimated Fair Value Of Contingent Consideration) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Fair Value Measurements [Abstract]
Balance at beginning of period	$ 13,325	$ 19,663	$ 15,400
Fair value at acquisition date		18,870		18,870
Foreign currency translation	10	1	22	(14)
Change in the estimated fair value of contingent consideration liability	(12,773)	(2,231)	(14,860)	(1,423)
Balance at end of period	$ 562	$ 17,433	$ 562	$ 17,433