Accumulated Other Comprehensive (Loss) Income (Schedule of Changes In Each Component of Accumulated Other Comprehensive Income) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning Balance	$ 677,066	$ 577,852
Other comprehensive income before classifications	(11,066)	15,687
Amounts reclassified from other comprehensive income	1	(588)
Other comprehensive (loss) income, net of tax	(11,065)	15,099
Ending balance	682,231	651,050
Defined Benefit Pension Plans
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning Balance	(2,581)	(3,422)
Other comprehensive income before classifications	0	0
Amounts reclassified from other comprehensive income	0	0
Other comprehensive (loss) income, net of tax	0	0
Ending balance	(2,581)	(3,422)
Securities available-for-sale:
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning Balance	(107,958)	(128,066)
Other comprehensive income before classifications	(11,066)	15,687
Amounts reclassified from other comprehensive income	1	(588)
Other comprehensive (loss) income, net of tax	(11,065)	15,099
Ending balance	(119,023)	(112,967)
Total
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning Balance	(110,539)	(131,488)
Other comprehensive (loss) income, net of tax	(11,065)	15,099
Ending balance	$ (121,604)	$ (116,389)