DERIVATIVE FINANCIAL INSTRUMENTS (Summary Of Derivative Financial Instruments Notional Amounts On Outstanding Positions) (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Derivatives, Fair Value [Line Items]
Total notional value	$ 165,882	$ 194,582
Derivative fair value	(933)	(1,313)
Euro
Derivatives, Fair Value [Line Items]
Total notional value	45,086	34,959
Derivative fair value	(532)	(92)
Singapore Dollar
Derivatives, Fair Value [Line Items]
Total notional value	36,023	34,584
Derivative fair value	(489)	254
Japanese Yen
Derivatives, Fair Value [Line Items]
Total notional value	22,337	25,561
Derivative fair value	75	(178)
British Pound Sterling
Derivatives, Fair Value [Line Items]
Total notional value	10,377	22,185
Derivative fair value	(54)	183
South Korean Won
Derivatives, Fair Value [Line Items]
Total notional value	13,297	9,408
Derivative fair value	128	63
Other currencies
Derivatives, Fair Value [Line Items]
Total notional value	38,762	67,885
Derivative fair value	$ (61)	$ (1,543)