Senior Notes (Tables)

3 Months Ended

Mar. 31, 2021

Senior Notes [Abstract]

Schedule Of Outstanding Senior Notes

				March 31, 2021				December 31, 2020
				Consolidated Balance				Consolidated Balance
(Dollars in thousands)	Date Issued	Date Due	Principal Amounts	Sheet Amount		Market Value		Sheet Amount		Market Value
4.868% Senior notes	6/5/2014	6/1/2044	400,000	$	397,224	$	479,616	$	397,194	$	528,000
3.5% Senior notes	10/07/2020	10/15/2050	1,000,000		979,654		976,480		979,524		1,138,100

Schedule Of Interest Expense Incurred In Connection With Senior Notes

	Three Months Ended
	March 31,
(Dollars In thousands	2021		2020
Interest expense incurred 4.868% Senior notes	$	4,868	$	4,868
Interest expense incurred 3.5% Senior notes		8,805		-