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, 2023	Dec. 31, 2022	Dec. 31, 2021
Retirement Benefits [Abstract]
Prior service credit (cost)	$ 181	$ 452
Accumulated gain (loss)	(18,304)	(23,363)
Accumulated other comprehensive income (loss)	(18,123)	(22,911)
Cumulative employer contributions in excess of net periodic benefit cost	14,016	15,465
Net amount recognized as an accrued benefit liability on the December 31 balance sheet	(4,107)	(7,446)
Net gain (loss) arising during period	3,594	3,197
Amortization of net (gain) loss	1,464	1,717	$ 2,578
Amortization of prior service cost	(271)	(271)	$ (271)
Total recognized in other comprehensive income (loss)	4,787	4,643
Total income (expense) recognized in net periodic pension cost and other comprehensive income	$ 2,531	$ 4,471