Fair Value Measurement (Financial Assets And Liabilities Measured At Fair Value On A Recurring Basis) (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Assets, Fair Value Disclosure [Abstract]
Cash equivalents	$ 115,341	$ 68,498
Marketable securities	1,484	1,173
Interest Rate Swap
Liabilities, Fair Value Disclosure [Abstract]
Interest rate swap contracts	2,246	356
Foreign Exchange Forward
Assets, Fair Value Disclosure [Abstract]
Foreign currency derivatives	2,857	3,509
Liabilities, Fair Value Disclosure [Abstract]
Interest rate swap contracts	2,757	3,121
Level I
Assets, Fair Value Disclosure [Abstract]
Cash equivalents	115,341	68,498
Marketable securities	1,484	1,173
Level II | Interest Rate Swap
Liabilities, Fair Value Disclosure [Abstract]
Interest rate swap contracts	2,246	356
Level II | Foreign Exchange Forward
Assets, Fair Value Disclosure [Abstract]
Foreign currency derivatives	2,857	3,509
Liabilities, Fair Value Disclosure [Abstract]
Interest rate swap contracts	$ 2,757	$ 3,121