Accumulated Other Comprehensive Loss (Schedule of Changes In Each Component of Accumulated Other Comprehensive Income) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning Balance	$ 682,231	$ 651,050	$ 677,066	$ 577,852
Other comprehensive (loss) income before classifications	(714)	(14,059)
Amounts reclassified from other comprehensive income	0	0	1	(588)
Other comprehensive (loss) income, net of tax	(714)	(14,059)	(11,779)	1,040
Ending balance	686,740	636,192	686,740	636,192
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) income before classifications	0	0	0	0
Amounts reclassified from other comprehensive income	0	0	0	0
Other comprehensive (loss) income, 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	(119,023)	(112,967)	(107,958)	(128,066)
Other comprehensive (loss) income before classifications	(714)	(14,059)	(11,780)	1,628
Amounts reclassified from other comprehensive income	0	0	1	(588)
Other comprehensive (loss) income, net of tax	(714)	(14,059)	(11,779)	1,040
Ending balance	(119,737)	(127,026)	(119,737)	(127,026)
Total
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning Balance	(121,604)	(116,389)	(110,539)	(131,488)
Other comprehensive (loss) income before classifications			(11,780)	1,628
Other comprehensive (loss) income, net of tax	(714)	(14,059)	(11,779)	1,040
Ending balance	$ (122,318)	$ (130,448)	$ (122,318)	$ (130,448)