Accumulated Other Comprehensive Income (Components Of Accumulated Other Comprehensive Income) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance as of December 31, 2014	$ (2,412)
Other comprehensive income (loss) before reclassifications	(3,274)
Amounts reclassified from other comprehensive income (loss)	(1,085)
Net current period other comprehensive income (loss)	(4,359)	(287)
Balance as of March 31, 2015	(6,771)
Unrealized losses on Marketable Securities [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance as of December 31, 2014	(59)
Other comprehensive income (loss) before reclassifications	27
Net current period other comprehensive income (loss)	27
Balance as of March 31, 2015	(32)
Foreign Currency Translation Adjustments [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance as of December 31, 2014	(4,244)
Other comprehensive income (loss) before reclassifications	(5,639)
Net current period other comprehensive income (loss)	(5,639)
Balance as of March 31, 2015	(9,883)
Unrealized Gains (Losses) on Cash Flow Hedges [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance as of December 31, 2014	1,891
Other comprehensive income (loss) before reclassifications	2,338
Amounts reclassified from other comprehensive income (loss)	(1,085)
Net current period other comprehensive income (loss)	1,253
Balance as of March 31, 2015	$ 3,144