Fair Value Of Financial Instruments, Derivative And Marketable Securities (Notional Amount Of Foreign Exchange Contracts) (Details)			12 Months Ended
	Dec. 31, 2014 USD ($)	Dec. 31, 2013 JPY (¥)	Dec. 31, 2014 Foreign Exchange Contract 1 [Member] USD ($)	Dec. 31, 2014 Foreign Exchange Contract 2 [Member] USD ($)	Dec. 31, 2014 Foreign Exchange Contract 3 [Member] USD ($)	Dec. 31, 2014 Foreign Exchange Contract 4 [Member] USD ($)	Dec. 31, 2014 Foreign Exchange Contract 5 [Member] USD ($)
Derivative [Line Items]
Transaction Date			2014-09	2014-10	2014-12	2014-05	2014-05
Amount Available in Dollars	$ 31,451,000	¥ 3,300,000,000	$ 900,000	$ 900,000	$ 600,000	$ 832,000	$ 28,219,000
Effective Date			2015-01	2015-01	2015-01	2014-05	2015-01
Expiration Date			2015-12	2015-12	2015-12	2015-03	2015-12