Senior Notes (Tables)

9 Months Ended

Sep. 30, 2021

Senior Notes [Abstract]

Schedule Of Outstanding Senior Notes

				September 30, 2021				December 31, 2020
				Consolidated				Consolidated
			Principal	Balance Sheet		Market		Balance Sheet		Market
(Dollars in thousands)	Date Issued	Date Due	Amounts	Amount		Value		Amount		Value
4.868% Senior notes	06/05/2014	06/01/2044	400,000	$	397,284	$	506,828	$	397,194	$	528,000
3.5% Senior notes	10/07/2020	10/15/2050	1,000,000	$	979,915	$	1,065,400	$	979,524	$	1,138,100

Schedule Of Interest Expense Incurred In Connection With Senior Notes

	Three Months Ended				Nine Months Ended
	September 30,				September 30,
(Dollars in thousands)	2021		2020		2021		2020
Interest expense incurred 4.868% Senior notes	$	4,868	$	4,868	$	14,604	$	14,604
Interest expense incurred 3.5% Senior notes	$	8,805	$	-	$	26,415	$	-