Fair Value Measurement (Financial Assets And Liabilities Measured At Fair Value On A Recurring Basis) (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Assets, Fair Value Disclosure [Abstract]
Cash equivalents	$ 107,494	$ 191,214
Marketable securities	62,442	4,448
Foreign currency derivatives	667	1,884
Interest Rate Swap [Member]
Liabilities, Fair Value Disclosure [Abstract]
Derivative liabilities	2,403	1,966
Foreign Exchange Forward [Member]
Liabilities, Fair Value Disclosure [Abstract]
Derivative liabilities	3,515	1,888
Level I [Member]
Assets, Fair Value Disclosure [Abstract]
Cash equivalents	107,494	191,214
Marketable securities	62,442	4,448
Foreign currency derivatives	0	0
Level I [Member] | Interest Rate Swap [Member]
Liabilities, Fair Value Disclosure [Abstract]
Derivative liabilities	0	0
Level I [Member] | Foreign Exchange Forward [Member]
Liabilities, Fair Value Disclosure [Abstract]
Derivative liabilities	0	0
Level II [Member]
Assets, Fair Value Disclosure [Abstract]
Cash equivalents	0	0
Marketable securities	0	0
Foreign currency derivatives	667	1,884
Level II [Member] | Interest Rate Swap [Member]
Liabilities, Fair Value Disclosure [Abstract]
Derivative liabilities	2,403	1,966
Level II [Member] | Foreign Exchange Forward [Member]
Liabilities, Fair Value Disclosure [Abstract]
Derivative liabilities	3,515	1,888
Level III [Member]
Assets, Fair Value Disclosure [Abstract]
Cash equivalents	0	0
Marketable securities	0	0
Foreign currency derivatives	0	0
Level III [Member] | Interest Rate Swap [Member]
Liabilities, Fair Value Disclosure [Abstract]
Derivative liabilities	0	0
Level III [Member] | Foreign Exchange Forward [Member]
Liabilities, Fair Value Disclosure [Abstract]
Derivative liabilities	$ 0	$ 0