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Derivative Instruments (Fair Value Of Derivative Instruments) (Details) - Non-hedging interest rate derivatives: - USD ($) $ in Thousands | Mar. 31, 2021 | Dec. 31, 2020
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Customer Counterparties Loan Interest Rate Swap Assets | Other Assets |  |
Derivatives, Fair Value [Line Items] |  |
Notional Amount | $ 519,841 | $ 647,613
Fair Value | 23,299 | 52,364
Customer Counterparties Loan Interest Rate Swap Liabilities | Other Liabilities |  |
Derivatives, Fair Value [Line Items] |  |
Notional Amount | 167,663 | 37,721
Fair Value | 6,250 | 562
Financial Institution Counterparties Loan Interest Rate Swap Asset | Other Assets |  |
Derivatives, Fair Value [Line Items] |  |
Notional Amount | 177,540 | 37,721
Fair Value | 6,677 | 562
Financial Institution Counterparties Loan Interest Rate Swap Liabilities | Other Liabilities |  |
Derivatives, Fair Value [Line Items] |  |
Notional Amount | 523,894 | 661,866
Fair Value | $ 23,433 | $ 52,607

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- Definition Fair value of the assets less the liabilities of a derivative or group of derivatives. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=121572278&loc=d3e13433-108611 + Details
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- Definition Nominal or face amount used to calculate payment on derivative. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 1B -URI http://asc.fasb.org/extlink&oid=121590274&loc=SL5580258-113959 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 1A -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=121590274&loc=SL5579245-113959 + Details
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