Goodwill And Intangible Assets (Changes To Intangible Assets) (Details) (USD $) In Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2011	Dec. 31, 2010
Goodwill And Intangible Assets [Abstract]
Balance at beginning of period, net of accumulated amortization	$ 162,636	$ 118,731
Purchase price allocations	5,980	62,617
Amortization expense	(16,200)	(17,126)
Currency translation	137	(1,586)
Balance at end of period, net of accumulated amortization	$ 152,553	$ 162,636