Fair Value Measurement (Financial Assets And Liabilities Measured At Fair Value On A Recurring Basis) (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Assets, Fair Value Disclosure [Abstract]
Cash equivalents	$ 176,115	$ 68,498
Marketable securities	970	1,173
Derivatives	2,859	3,509
Interest Rate Swap
Liabilities, Fair Value Disclosure [Abstract]
Derivatives	2,433	356
Foreign Exchange Forward
Liabilities, Fair Value Disclosure [Abstract]
Derivatives	2,472	3,121
Level I
Assets, Fair Value Disclosure [Abstract]
Cash equivalents	176,115	68,498
Marketable securities	970	1,173
Derivatives	0	0
Level I | Interest Rate Swap
Liabilities, Fair Value Disclosure [Abstract]
Derivatives	0	0
Level I | Foreign Exchange Forward
Liabilities, Fair Value Disclosure [Abstract]
Derivatives	0	0
Level II
Assets, Fair Value Disclosure [Abstract]
Cash equivalents	0	0
Marketable securities	0	0
Derivatives	2,859	3,509
Level II | Interest Rate Swap
Liabilities, Fair Value Disclosure [Abstract]
Derivatives	2,433	356
Level II | Foreign Exchange Forward
Liabilities, Fair Value Disclosure [Abstract]
Derivatives	2,472	3,121
Level III
Assets, Fair Value Disclosure [Abstract]
Cash equivalents	0	0
Marketable securities	0	0
Derivatives	0	0
Level III | Interest Rate Swap
Liabilities, Fair Value Disclosure [Abstract]
Derivatives	0	0
Level III | Foreign Exchange Forward
Liabilities, Fair Value Disclosure [Abstract]
Derivatives	$ 0	$ 0