| Schedule of Debt [Table Text Block] | Debt as of September 30, 2011 and December 31, 2010 was as follows: | | | | | | | | | | September 30, 2011 | | December 31, 2010 | | (In thousands) | 7.875% Debentures due February 2013 | 4,857 |
| | 8,557 |
| 7.375% Senior Notes due October 2014 | 180,692 |
| | 180,692 |
| 6.75% Senior Notes due April 2015 | 136,465 |
| | 157,250 |
| 6.75% Senior Notes due April 2016 | 197,377 |
| | 212,927 |
| 7.0% Senior Notes due June 2017 | 295,000 |
| | 295,000 |
| 7.625% Senior Notes due October 2018 | 250,000 |
| | 250,000 |
| 7.0% Senior Notes due May 2019 | 250,000 |
| | 250,000 |
| 8.0% Senior Notes due November 2021 | 150,000 |
| | 150,000 |
| 7.5% Senior Notes due April 2027 | 200,000 |
| | 200,000 |
| Bank credit facility due March 2016 | 65,000 |
| | — |
| Obligations under capital leases | 126,658 |
| | 118,339 |
| Mortgage notes and other debt, maturities through 2047 | 36,565 |
| | 38,223 |
| Unamortized pricing discounts and other | (5,030 | ) | | (6,106 | ) | Total debt | 1,887,584 |
| | 1,854,882 |
| Less current maturities | (23,685 | ) | | (22,502 | ) | Total long-term debt | $ | 1,863,899 |
| | $ | 1,832,380 |
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