|
Debt Fair Value of Financial Instruments (Details) (USD $)
In Thousands, unless otherwise specified |
Sep. 30, 2014
|
Dec. 31, 2013
|
|---|---|---|
| Long-term Debt, Gross | $ 2,426,257 | $ 2,500,434 |
| Debt Instrument, Unamortized Discount | 537,115 | 573,082 |
|
7.75% Senior Subordinated Notes, Due 2020 [Member]
|
||
| Long-term Debt, Gross | 400,000 | 400,000 |
| Long-term Debt, Fair Value | 421,000 | 435,800 |
|
3.75% Convertible Senior Subordinated Notes, due 2025 [Member]
|
||
| Long-term Debt, Gross | 79,979 | 132,408 |
| Long-term Debt, Fair Value | 180,800 | 306,500 |
| Long-term Debt | 53,801 | 87,310 |
| Debt Instrument, Unamortized Discount | 26,178 | 45,098 |
|
4.00% Junior Subordinated Convertible Debentures, due 2033 [Member]
|
||
| Long-term Debt, Gross | 307,122 | 307,153 |
| Long-term Debt, Fair Value | 468,300 | 455,900 |
| Long-term Debt | 188,124 | 186,136 |
| Debt Instrument, Unamortized Discount | 118,998 | 121,017 |
|
3.25% Convertible Senior Debentures, Due 2035 [Member]
|
||
| Long-term Debt, Gross | 427,500 | 427,500 |
| Long-term Debt, Fair Value | 450,000 | 457,400 |
| Long-term Debt | 405,419 | 393,126 |
| Debt Instrument, Unamortized Discount | 22,081 | 34,374 |
|
3.75% Convertible Senior Subordinated Notes Due 2042 [Member]
|
||
| Long-term Debt, Gross | 390,000 | 390,000 |
| Long-term Debt, Fair Value | 608,000 | 592,800 |
| Long-term Debt | 226,389 | 225,014 |
| Debt Instrument, Unamortized Discount | 163,611 | 164,986 |
|
3.50% Convertible Senior Subordianted Notes, Due 2044 [Member]
|
||
| Long-term Debt, Gross | 424,250 | 424,250 |
| Long-term Debt, Fair Value | 469,600 | 428,500 |
| Long-term Debt | 218,003 | 216,643 |
| Debt Instrument, Unamortized Discount | $ 206,247 | $ 207,607 |