Investment Securities (Schedule Of Investment Securities Classified As Available-for-sale And Held-to-maturity) (Details) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Available-for-sale [Abstract]
Total	$ 836,072	$ 945,212
Gross unrealized gains	188	14,081
Gross unrealized losses	(45,666)	(5,584)
Investment securities available-for-sale	790,594	953,709
U.S. Government Agency Securities [Member]
Available-for-sale [Abstract]
Total	25,872	36,182
Gross unrealized gains	14	1,167
Gross unrealized losses	(1,604)	(47)
Investment securities available-for-sale	24,282	37,302
Asset-backed Securities [Member]
Available-for-sale [Abstract]
Total	354,690	360,332
Gross unrealized gains		327
Gross unrealized losses	(13,709)	(241)
Investment securities available-for-sale	340,981	360,418
Federally insured student loan securities [Member]
Available-for-sale [Abstract]
Total	18,692	22,518
Gross unrealized gains		13
Gross unrealized losses	(244)	(73)
Investment securities available-for-sale	18,448	22,458
Collateralized Loan Obligations Securities [Member]
Available-for-sale [Abstract]
Total	335,998	337,814
Gross unrealized gains		314
Gross unrealized losses	(13,465)	(168)
Investment securities available-for-sale	322,533	337,960
Tax-exempt Obligations Of States And Political Subdivisions [Member]
Available-for-sale [Abstract]
Total	3,559	3,559
Gross unrealized gains		172
Gross unrealized losses	(102)
Investment securities available-for-sale	3,457	3,731
Taxable Obligations Of States And Political Subdivisions [Member]
Available-for-sale [Abstract]
Total	45,696	45,984
Gross unrealized gains	54	2,422
Gross unrealized losses	(1,718)
Investment securities available-for-sale	44,032	48,406
Residential Mortgage-backed Securities [Member]
Available-for-sale [Abstract]
Total	154,920	179,778
Gross unrealized gains	120	4,804
Gross unrealized losses	(10,726)	(281)
Investment securities available-for-sale	144,314	184,301
Collateralized Mortgage Obligation Securities [Member]
Available-for-sale [Abstract]
Total	46,479	60,778
Gross unrealized gains		1,083
Gross unrealized losses	(1,717)
Investment securities available-for-sale	44,762	61,861
Commercial Mortgage-backed Securities [Member]
Available-for-sale [Abstract]
Total	194,856	248,599
Gross unrealized gains		4,106
Gross unrealized losses	(12,890)	(1,629)
Investment securities available-for-sale	181,966	251,076
Corporate Debt Securities [Member]
Available-for-sale [Abstract]
Total	10,000	10,000
Gross unrealized losses	(3,200)	(3,386)
Investment securities available-for-sale	$ 6,800	$ 6,614

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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