Hedge Accounting (Schedule Of Derivative Instruments On The Balance Sheet At Fair Value) (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Derivatives, Fair Value [Line Items]
Derivative financial instruments - current portion	$ 218	$ 218
Derivative financial instruments - non-current portion	152	212
Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Total derivatives designated as hedging instruments	370	430
Total derivatives	370	430
Designated as Hedging Instrument [Member] \| Other Noncurrent Liabilities [Member]
Derivatives, Fair Value [Line Items]
Derivative financial instruments - non-current portion	152	212
Interest Rate Contracts [Member] \| Designated as Hedging Instrument [Member] \| Other Current Liabilities [Member]
Derivatives, Fair Value [Line Items]
Derivative financial instruments - current portion	$ 218	$ 218

Fair values as of the balance sheet date of the net amount of all assets and liabilities resulting from contracts that meet the criteria of being accounted for as derivative instruments.

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Fair value, after the effects of master netting arrangements, of a financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset, expected to be settled within one year or normal operating cycle, if longer. Includes assets not subject to a master netting arrangement and not elected to be offset.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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