Employee Benefit Plans (Schedule Of Amounts Not Yet Reflected In Net Periodic Benefit Cost And Included In Accumulated Other Comprehensive Income (Loss), Pre-Tax Basis) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Retirement Benefits [Abstract]
Prior service (credit) cost	$ 452	$ 723
Accumulated loss	(23,363)	(28,277)
Accumulated other comprehensive loss	(22,911)	(27,554)
Cumulative employer contributions in excess of net periodic benefit cost	15,465	15,623
Net amount recognized as an accrued benefit liability on the December 31 balance sheet	(7,446)	(11,931)
Net loss arising during period	3,197	3,627
Amortization of net loss	1,717	2,578	$ 2,138
Amortization of prior service cost	(271)	(271)	$ (271)
Total recognized in other comprehensive income	4,643	5,934
Total expense recognized in net periodic pension cost and other comprehensive income	$ 4,471	$ 5,602