Derivative Financial Instruments (Summary Of Derivative Financial Instruments Notional Amounts On Outstanding Positions) (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Derivatives, Fair Value [Line Items]
Notional	$ 134,287	$ 194,582
Fair Value	111	(1,313)
Euro
Derivatives, Fair Value [Line Items]
Notional	46,757	34,959
Fair Value	36	(92)
Singapore Dollar
Derivatives, Fair Value [Line Items]
Notional	31,255	34,584
Fair Value	344	254
Japanese Yen
Derivatives, Fair Value [Line Items]
Notional	11,823	25,561
Fair Value	63	(178)
South Korean Won
Derivatives, Fair Value [Line Items]
Notional	10,328	9,408
Fair Value	(82)	63
British Pound Sterling
Derivatives, Fair Value [Line Items]
Notional	9,155	22,185
Fair Value	(104)	183
Other currencies
Derivatives, Fair Value [Line Items]
Notional	24,969	67,885
Fair Value	$ (146)	$ (1,543)