Senior Notes (Tables)

12 Months Ended

Dec. 31, 2015

Senior Notes [Abstract]

Schedule Of Outstanding Senior Notes

					December 31, 2015				December 31, 2014
					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	06/05/2014	06/01/2044		400,000	$	400,000	$	381,204	$	400,000	$	404,892
5.40% Senior notes	10/12/2004	10/15/2014		250,000		-		-		-		-

Schedule Of Interest Expense Incurred In Connection With Senior Notes

	Years Ended December 31,
(Dollars in thousands)	2015		2014		2013
Interest expense incurred	$	19,472	$	21,818	$	13,551