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Investment Securities (Schedule Of Unrealized Loss On Securities) (Details) - USD ($) $ in Thousands | Sep. 30, 2021 | Dec. 31, 2020
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Schedule of Investments [Line Items] |  |
Securities Available-for-Sale, Less than 12 months, Fair value | $ 536,390 | $ 86,393
Securities Available-for-Sale, Less than 12 months, Unrealized losses | 5,512 | 695
Securities Available-for-Sale, 12 months or longer, Fair value |  | 4,727
Securities Available-for-Sale, 12 months or longer, Unrealized losses |  | 33
Securities Available-for-Sale, Fair value, Total | 536,390 | 91,120
Securities Available-for-Sale, Unrealized losses, Total | 5,512 | 728
U.S. Government Sponsored Entities Asset-Backed Securities [Member] |  |
Schedule of Investments [Line Items] |  |
Securities Available-for-Sale, Less than 12 months, Fair value | 296,586 | 86,393
Securities Available-for-Sale, Less than 12 months, Unrealized losses | 4,855 | 695
Securities Available-for-Sale, 12 months or longer, Fair value |  | 4,727
Securities Available-for-Sale, 12 months or longer, Unrealized losses |  | 33
Securities Available-for-Sale, Fair value, Total | 296,586 | 91,120
Securities Available-for-Sale, Unrealized losses, Total | 4,855 | $ 728
Collateralized Loan Obligations |  |
Schedule of Investments [Line Items] |  |
Securities Available-for-Sale, Less than 12 months, Fair value | 239,804 |
Securities Available-for-Sale, Less than 12 months, Unrealized losses | 657 |
Securities Available-for-Sale, Fair value, Total | 239,804 |
Securities Available-for-Sale, Unrealized losses, Total | $ 657 |

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- Definition Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in continuous unrealized loss position for more than 12 months, without allowance for credit loss. Includes beneficial interest in securitized financial asset. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 30 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=124269663&loc=SL82922890-210455 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=123581744&loc=d3e27337-111563 Reference 3: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 30 -Section 55 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=121590138&loc=SL82922954-210456 + Details
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- Definition Amount of accumulated unrealized loss on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in continuous unrealized loss position for 12 months or longer, without allowance for credit loss. Includes beneficial interest in securitized financial asset. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=123581744&loc=d3e27337-111563 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 30 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=124269663&loc=SL82922890-210455 + Details
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