Credit Risk and Fair Value of Financial Instruments Level 3 (Tables)

12 Months Ended

Dec. 31, 2013

Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]

Fair Value, Measurement Inputs, Disclosure [Table Text Block]

The fair value of our debt instruments at December 31 was as follows:

	2013		2012
	(In thousands)
7.875% Debentures due February 2013	$	—	$	4,786
3.125% Senior Convertible Notes due July 2014	106,939		—
6.75% Senior Notes due April 2015	144,653		150,112
6.75% Senior Notes due April 2016	214,904		222,049
3.125% Senior Convertible Notes due July 2016	60,487		—
7.0% Senior Notes due June 2017	333,259		341,094
7.625% Senior Notes due October 2018	288,875		298,750
6.5% Senior Notes due April 2019	210,000		—
7.0% Senior Notes due May 2019	270,000		276,250
4.5% Senior Notes due November 2020	192,610		204,500
8.0% Senior Notes due November 2021	173,625		186,000
5.375% Senior Notes due January 2022	431,588		—
7.5% Senior Notes due April 2027	215,750		215,500
Term Loan due July 2018	600,000		—
Bank credit facility due March 2016	—		86,600
Bank credit facility due July 2018	30,000		—
Mortgage notes and other debt, maturities through 2047	4,752		5,698
Total fair value of debt instruments	$	3,277,442	$	1,991,339