Debt and Credit Facilities (Tables)

6 Months Ended

Jun. 30, 2013

Debt and Credit Facilities

Schedule of long-term and short-term debt and credit facilities

(in thousands)	JUNE 30, 2013			DECEMBER 31, 2012
Senior notes
5.4 percent senior notes due January 2015	$	126,481		$	126,481
8.4 percent senior notes due May 2017	230,000			230,000
6.6 percent senior notes due May 2020	300,000			300,000
5.4 percent senior notes due October 2022	250,000			250,000
Convertible senior notes
1.6 percent convertible senior notes due May 2018	225,000			225,000
0.25 percent convertible senior notes due June 2019	267,500			-
Total senior and convertible senior notes	1,398,981			1,131,481
Debt discount	(2,688		)	(3,000		)
Senior and convertible senior notes, net	1,396,293			1,128,481
Secured notes payable	3,792			5,987
Total debt	$	1,400,085		$	1,134,468