Senior Notes (Tables)

12 Months Ended

Dec. 31, 2011

Senior Notes [Abstract]

Outstanding Senior Notes

					December 31, 2011				December 31, 2010
					Consolidated Balance				Consolidated Balance
(Dollars in thousands)	Date Issued	Date Due	Principal Amounts		Sheet Amount		Market Value		Sheet Amount		Market Value
5.40% Senior notes	10/12/2004	10/15/2014	$	250,000	$	249,858	$	251,370	$	249,812	$	267,500
8.75% Senior notes (matured and paid on March 15, 2010)	03/14/2000	03/15/2010	$	200,000	$	-	$	-	$	-	$	-

Interest Expense Incurred

	Years Ended December 31,
(Dollars in thousands)	2011		2010		2009
Interest expense incurred	$	13,546	$	17,219	$	31,190