Investment Securities (Schedule Of Investment Securities Classified As Available-for-sale And Held-to-maturity) (Details) - USD ($) $ in Thousands	Jun. 30, 2026	Dec. 31, 2025
Debt Securities, Available-for-Sale [Abstract]
Amortized cost	$ 1,619,713	$ 1,657,326
Gross unrealized gains	13,413	27,764
Gross unrealized losses	(18,236)	(13,340)
Fair value	1,614,890	1,671,750
U.S. Government agency securities
Debt Securities, Available-for-Sale [Abstract]
Amortized cost	23,151	25,503
Gross unrealized gains	8	63
Gross unrealized losses	(635)	(457)
Fair value	22,524	25,109
Asset-backed securities
Debt Securities, Available-for-Sale [Abstract]
Amortized cost	226,817	234,029
Gross unrealized gains	145	205
Gross unrealized losses	(393)	(133)
Fair value	226,569	234,101
Tax-exempt obligations of states and political subdivisions
Debt Securities, Available-for-Sale [Abstract]
Amortized cost	14,612	9,614
Gross unrealized gains	72	62
Gross unrealized losses	(48)	(40)
Fair value	14,636	9,636
Taxable obligations of states and political subdivisions
Debt Securities, Available-for-Sale [Abstract]
Amortized cost	16,677	18,941
Gross unrealized gains	49	45
Gross unrealized losses	(55)	(59)
Fair value	16,671	18,927
Residential mortgage-backed securities
Debt Securities, Available-for-Sale [Abstract]
Amortized cost	433,475	454,837
Gross unrealized gains	5,800	13,039
Gross unrealized losses	(4,362)	(3,553)
Fair value	434,913	464,323
Collateralized mortgage obligation securities
Debt Securities, Available-for-Sale [Abstract]
Amortized cost	52,889	58,129
Gross unrealized gains	0	44
Gross unrealized losses	(1,377)	(593)
Fair value	51,512	57,580
Commercial mortgage-backed securities
Debt Securities, Available-for-Sale [Abstract]
Amortized cost	852,092	856,273
Gross unrealized gains	7,339	14,306
Gross unrealized losses	(11,366)	(8,505)
Fair value	$ 848,065	$ 862,074

Amount, before tax, of unrealized gain in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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