Accumulated Other Comprehensive Income (Loss) (Schedule Of Changes In The Composition Of Accumulated Other Comprehensive Income (Loss)) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Accumulated Other Comprehensive Income (Loss) [Abstract]
Foreign Currency Translation, Beginning balance	$ 3,264	$ 4,176	$ 3,055
Foreign Currency Translation, Other comprehensive income (loss) before reclassifications			$ 1,121
Foreign Currency Translation, Amounts reclassified out of accumulated other comprehensive income (loss) to other income (expense), net
Foreign Currency Translation, Net other comprehensive income	(1,194)	(912)	$ 1,121
Foreign Currency Translation, Ending balance	2,070	$ 3,264	4,176
Available-for-Sale Investments, Beginning balance			(67)
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
Net change			$ 67
Available-for-Sale Investments, Ending balance
Beginning balance	3,264	$ 4,176	$ 2,988
Other comprehensive income (loss) before reclassifications			1,117
Amounts reclassified out of accumulated other comprehensive income to other income, net			71
Total other comprehensive income (loss)	(1,194)	(912)	1,188
Ending balance	$ 2,070	$ 3,264	$ 4,176