Investment Securities (Schedule Of Investment Securities) (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Schedule of Investments [Line Items]
Debt Securities, Available-for-sale, Amortized Cost	$ 1,334,973	$ 1,418,770
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	726	1,227
Securities Available-for-Sale, Gross Unrealized Holding Losses	86,912	87,155
Debt Securities, Available-for-sale	1,248,787	1,332,842
US States and Political Subdivisions Debt Securities [Member]
Schedule of Investments [Line Items]
Debt Securities, Available-for-sale, Amortized Cost	219,886	251,531
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	392	1,173
Securities Available-for-Sale, Gross Unrealized Holding Losses	13,752	11,520
Debt Securities, Available-for-sale	206,526	241,184
U.S. Government Sponsored Entities Asset-Backed Securities [Member]
Schedule of Investments [Line Items]
Debt Securities, Available-for-sale, Amortized Cost	672,462	703,645
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	13	23
Securities Available-for-Sale, Gross Unrealized Holding Losses	69,466	68,193
Debt Securities, Available-for-sale	603,009	635,475
Collateralized Loan Obligations
Schedule of Investments [Line Items]
Debt Securities, Available-for-sale, Amortized Cost	420,041	443,112
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	320	31
Securities Available-for-Sale, Gross Unrealized Holding Losses	1,364	4,857
Debt Securities, Available-for-sale	418,997	438,286
Corporate Debt Securities
Schedule of Investments [Line Items]
Debt Securities, Available-for-sale, Amortized Cost	22,584	20,482
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	1
Securities Available-for-Sale, Gross Unrealized Holding Losses	2,330	2,585
Debt Securities, Available-for-sale	$ 20,255	$ 17,897