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Fair Value of Assets & Liabilities (Summary Of Differences Between The Fair Value Carrying Amount Of Mortgages Held-For-Sale And Aggregate Unpaid Principal Amount) (Details) - USD ($) $ in Thousands | Dec. 31, 2017 | Dec. 31, 2016
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Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |
Loans held-for-sale | $ 20,881 | $ 24,269
Fair value carrying amount less aggregate unpaid principal - Total loans | (8,874) | (10,993)
Nonaccrual loans | 5,783 | 6,775
Fair value carrying amount less aggregate unpaid principal - Nonaccrual loans | (5,098) | (6,135)
Loans 90 days or more past due and still accruing | 0 | 211
Fair value carrying amount less aggregate unpaid principal - Loans 90 days or more past due and still accruing | 0 | (120)
Aggregate unpaid principal |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] |  |
Loans held-for-sale | 29,755 | 35,262
Nonaccrual loans | 10,881 | 12,910
Loans 90 days or more past due and still accruing | $ 0 | $ 331

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