Accumulated Other Comprehensive (Loss) Income (Schedule of Changes In Each Component of Accumulated Other Comprehensive Income) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning Balance	$ 651,050	$ 632,430	$ 578,027	$ 681,105
Other comprehensive loss	(14,059)	(39,269)
Amounts reclassified from other comprehensive income	0		(588)
Other comprehensive (loss) income, net of tax	(14,059)	(39,269)	1,040	(98,243)
Ending balance	636,192	591,993	636,192	591,993
Defined Benefit Pension Plans
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning Balance	(3,422)	(3,485)	(3,422)	(3,485)
Other comprehensive loss	0	0	0	0
Amounts reclassified from other comprehensive income	0		0
Other comprehensive (loss) income, net of tax	0	0		0
Ending balance	(3,422)	(3,485)	(3,422)	(3,485)
Securities available-for-sale:
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning Balance	(112,967)	(41,229)	(128,066)	17,745
Other comprehensive loss	(14,059)	(39,269)	1,628	(98,243)
Amounts reclassified from other comprehensive income	0		(588)
Other comprehensive (loss) income, net of tax	(14,059)	(39,269)	1,040	(98,243)
Ending balance	(127,026)	(80,498)	(127,026)	(80,498)
Total
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning Balance	(116,389)	(44,714)	(131,488)	14,260
Other comprehensive loss			1,628	(98,243)
Other comprehensive (loss) income, net of tax	(14,059)	(39,269)	1,040	(98,243)
Ending balance	$ (130,448)	$ (83,983)	$ (130,448)	$ (83,983)