Accumulated Other Comprehensive Loss (Schedule of Changes In Each Component of Accumulated Other Comprehensive Income) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning Balance	$ 686,740	$ 636,192	$ 677,066	$ 577,852
Other comprehensive (loss) before classifications	35,444	(36,700)
Amounts reclassified from other comprehensive income	10	555	11	(33)
Other comprehensive income (loss), net of tax	35,454	(36,145)	23,675	(35,105)
Ending balance	741,299	610,134	741,299	610,134
Defined Benefit Pension Plans
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning Balance	(2,581)	(3,422)	(2,581)	(3,422)
Other comprehensive (loss) before classifications	0	0	0	0
Amounts reclassified from other comprehensive income	0	0	0	0
Other comprehensive income (loss), net of tax	0	0	0	0
Ending balance	(2,581)	(3,422)	(2,581)	(3,422)
Securities available-for-sale:
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning Balance	(119,737)	(127,026)	(107,958)	(128,066)
Other comprehensive (loss) before classifications	35,444	(36,700)	23,664	(35,072)
Amounts reclassified from other comprehensive income	10	555	11	(33)
Other comprehensive income (loss), net of tax	35,454	(36,145)	23,675	(35,105)
Ending balance	(84,283)	(163,171)	(84,283)	(163,171)
Total
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning Balance	(122,318)	(130,448)	(110,539)	(131,488)
Other comprehensive (loss) before classifications			23,664	(35,072)
Other comprehensive income (loss), net of tax	35,454	(36,145)	23,675	(35,105)
Ending balance	$ (86,864)	$ (166,593)	$ (86,864)	$ (166,593)