Long-Term Debt (Tables)

12 Months Ended

Dec. 31, 2012

Long-Term Debt.

Long-Term Debt

	December 31,
	2012	2011
	(Thousands)
7.76% notes, due 2012 thru 2016	$      32,973	$       53,742
5.15% notes, due November 15, 2012	–	200,000
5.00% notes, due October 1, 2015	150,000	150,000
5.15% notes, due March 1, 2018	200,000	200,000
6.50% notes, due April 1, 2018	500,000	500,000
8.13% notes, due June 1, 2019	700,000	700,000
4.88% notes, due November 15, 2021	750,000	750,000
7.75% debentures, due July 15, 2026	115,000	115,000
Medium-term notes:
8.7% to 9.0% Series A, due 2014 thru 2021	40,200	40,200
7.3% to 7.6% Series B, due 2013 thru 2023	30,000	30,000
7.6% Series C, due 2018	8,000	8,000
	2,526,173	2,746,942
Less debt payable within one year	23,204	219,315
Total long-term debt	$  2,502,969	$  2,527,627