Investment Securities (Schedule Of Unrealized Loss On Securities) (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Schedule of Investments [Line Items]
Securities Available-for-Sale, Less than 12 months, Fair value		$ 237,613
Securities Available-for-Sale, Less than 12 months, Unrealized losses		1,106
Securities Available-for-Sale, 12 months or longer, Fair value	$ 5,665	171,805
Securities Available-for-Sale, 12 months or longer, Unrealized losses	70	5,117
Securities Available-for-Sale, Fair value, Total	5,665	409,418
Securities Available-for-Sale, Unrealized losses, Total	70	6,223
U.S. Government Sponsored Entities Asset-Backed Securities [Member]
Schedule of Investments [Line Items]
Securities Available-for-Sale, Less than 12 months, Fair value		237,613
Securities Available-for-Sale, Less than 12 months, Unrealized losses		1,106
Securities Available-for-Sale, 12 months or longer, Fair value	5,665	171,805
Securities Available-for-Sale, 12 months or longer, Unrealized losses	70	5,117
Securities Available-for-Sale, Fair value, Total	5,665	409,418
Securities Available-for-Sale, Unrealized losses, Total	$ 70	$ 6,223

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.

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