Comprehensive Income (Loss) (Components Of Comprehensive Income (Loss)) (Details) (USD $) In Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010
Comprehensive Income (Loss) [Abstract]
Net income (loss)	$ 5,361	$ 1,182	$ 32,255	$ (1,386)
Foreign currency translation adjustments	(4,030)	1,412	(2,449)	753
Unrealized gain (loss) on securities	(160)	(10)	5	(7)
Reversal of unrealized gain on securities sold			(178)	(589)
Total comprehensive income (loss)	$ 1,171	$ 2,584	$ 29,633	$ (1,229)