Accumulated Other Comprehensive Loss (Schedule of Changes In Each Component of Accumulated Other Comprehensive Income) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning Balance	$ 730,664	$ 677,066
Other comprehensive (loss) before classifications	15,768	(11,066)
Amounts reclassified from other comprehensive income	0	1
Other comprehensive income (loss), net of tax	15,768	(11,065)
Ending balance	756,336	682,231
Defined Benefit Pension Plans
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning Balance	(1,442)	(2,581)
Other comprehensive (loss) before classifications	0	0
Amounts reclassified from other comprehensive income	0	0
Other comprehensive income (loss), net of tax	0	0
Ending balance	(1,442)	(2,581)
Securities available-for-sale:
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning Balance	(114,277)	(107,958)
Other comprehensive (loss) before classifications	15,768	(11,066)
Amounts reclassified from other comprehensive income	0	1
Other comprehensive income (loss), net of tax	15,768	(11,065)
Ending balance	(98,509)	(119,023)
Total
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning Balance	(115,719)	(110,539)
Other comprehensive income (loss), net of tax	15,768	(11,065)
Ending balance	$ (99,951)	$ (121,604)