Debt (Tables)

6 Months Ended

Jun. 30, 2011

Debt

Schedule of long-term and short-term debt

(in thousands)	JUNE 30, 2011			DECEMBER 31, 2010
Senior notes
6.9 percent senior notes due June 2013	$	186,192		$	186,192
5.4 percent senior notes due January 2015	131,481			158,981
8.4 percent senior notes due May 2017	230,000			230,000
6.6 percent senior notes due May 2020	300,000			300,000
Total senior notes	847,673			875,173
Debt discount	(3,961		)	(4,305		)
Senior notes, net	843,712			870,868
Secured notes payable	8,789			9,010
Total debt	$	852,501		$	879,878