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, 2021	Dec. 31, 2020	Dec. 31, 2019
Retirement Benefits [Abstract]
Prior service (credit) cost	$ 723	$ 994
Accumulated loss	(28,277)	(34,482)
Accumulated other comprehensive loss	(27,554)	(33,488)
Cumulative employer contributions in excess of net periodic benefit cost	15,623	15,940
Net amount recognized as an accrued benefit liability on the December 31 balance sheet	(11,931)	(17,548)
Net loss arising during period	3,627	(6,104)
Amortization of net loss	2,578	2,138	$ 2,288
Amortization of prior service cost	(271)	(271)	$ (271)
Total recognized in other comprehensive income	5,934	(4,237)
Total expense recognized in net periodic pension cost and other comprehensive income	$ 5,602	$ (4,582)