Investment Securities (Schedule Of Unrealized Loss On Securities) (Details) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Schedule of Investments [Line Items]
Securities Available-for-Sale, Less than 12 months, Fair value	$ 1,327,939	$ 767,401
Securities Available-for-Sale, Less than 12 months, Unrealized losses	98,010	6,422
Securities Available-for-Sale, 12 months or longer, Fair value	383,147	73,431
Securities Available-for-Sale, 12 months or longer, Unrealized losses	53,420	3,092
Securities Available-for-Sale, Fair value, Total	1,711,086	840,832
Securities Available-for-Sale, Unrealized losses, Total	151,430	9,514
US States and Political Subdivisions Debt Securities [Member]
Schedule of Investments [Line Items]
Securities Available-for-Sale, Less than 12 months, Fair value	369,881	1,834
Securities Available-for-Sale, Less than 12 months, Unrealized losses	30,375	24
Securities Available-for-Sale, Fair value, Total	369,881	1,834
Securities Available-for-Sale, Unrealized losses, Total	30,375	24
U.S. Government Sponsored Entities Asset-Backed Securities [Member]
Schedule of Investments [Line Items]
Securities Available-for-Sale, Less than 12 months, Fair value	548,839	333,653
Securities Available-for-Sale, Less than 12 months, Unrealized losses	46,623	4,996
Securities Available-for-Sale, 12 months or longer, Fair value	236,024	73,431
Securities Available-for-Sale, 12 months or longer, Unrealized losses	45,949	3,092
Securities Available-for-Sale, Fair value, Total	784,863	407,084
Securities Available-for-Sale, Unrealized losses, Total	92,572	8,088
Collateralized Loan Obligations
Schedule of Investments [Line Items]
Securities Available-for-Sale, Less than 12 months, Fair value	361,935	429,671
Securities Available-for-Sale, Less than 12 months, Unrealized losses	19,046	1,395
Securities Available-for-Sale, 12 months or longer, Fair value	147,123
Securities Available-for-Sale, 12 months or longer, Unrealized losses	7,471
Securities Available-for-Sale, Fair value, Total	509,058	429,671
Securities Available-for-Sale, Unrealized losses, Total	26,517	1,395
US Government Corporations and Agencies Securities
Schedule of Investments [Line Items]
Securities Available-for-Sale, Less than 12 months, Fair value	38,122
Securities Available-for-Sale, Less than 12 months, Unrealized losses	878
Securities Available-for-Sale, Fair value, Total	38,122
Securities Available-for-Sale, Unrealized losses, Total	878
Corporate Debt Securities
Schedule of Investments [Line Items]
Securities Available-for-Sale, Less than 12 months, Fair value	9,162	2,243
Securities Available-for-Sale, Less than 12 months, Unrealized losses	1,088	7
Securities Available-for-Sale, Fair value, Total	9,162	2,243
Securities Available-for-Sale, Unrealized losses, Total	$ 1,088	$ 7

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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