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Hedge Accounting (Summary Of Hedged Transactions That Affect Earnings) (Details) - USD ($) $ in Thousands | 3 Months Ended
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Mar. 31, 2021 | Mar. 31, 2020
Derivative Instruments, Gain (Loss) [Line Items] |  |
Amount of Loss Recognized in Income on Derivatives (Effective Portion) | $ 1 |
Loss Reclassified from OCI into Income (Effective Portion) | 60 |
Designated as Hedging Instrument [Member] |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |
Amount of Loss Recognized in Income on Derivatives (Effective Portion) | (1) | $ 243
Loss Reclassified from OCI into Income (Effective Portion) | 60 | 29
Designated as Hedging Instrument [Member] | Interest Expense [Member] |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |
Loss Reclassified from OCI into Income (Effective Portion) | 60 | 29
Designated as Hedging Instrument [Member] | Interest Rate Contracts [Member] |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |
Amount of Loss Recognized in Income on Derivatives (Effective Portion) | $ (1) | $ 243

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