Accumulated Other Comprehensive Income (Loss) (Schedule Of Changes In The Composition Of Accumulated Other Comprehensive Income (Loss)) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Accumulated Other Comprehensive Income (Loss) [Abstract]
Foreign Currency Translation, Beginning balance	$ 4,176	$ 3,055	$ 2,430
Foreign Currency Translation, Other comprehensive income (loss) before reclassifications		1,121
Foreign Currency Translation, Amounts reclassified out of accumulated other comprehensive income to other income (expense), net
Foreign Currency Translation, Other comprehensive income (loss)	(912)	1,121	625
Foreign Currency Translation, Ending balance	3,264	4,176	3,055
Available-for-Sale Investments, Beginning balance		(67)	(86)
Available-for-Sale Investments, Other comprehensive income (loss) before reclassifications		(4)
Available-for-Sale Investments, Amounts reclassified out of accumulated other comprehensive income (loss) to other income (expense), net		71
Available-for-Sale Investments, Other comprehensive income		67	19
Available-for-Sale Investments, Ending balance			(67)
Beginning balance	4,176	2,988	2,344
Other comprehensive income (loss) before reclassifications		1,117
Amounts reclassified out of accumulated other comprehensive income to other income, net		71
Other comprehensive income (loss)	(912)	1,188	644
Ending balance	$ 3,264	$ 4,176	$ 2,988