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Debt (Tables)
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9 Months Ended |
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Sep. 30, 2014
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| Debt Disclosure [Abstract] |
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| Contingent Interest on Debt [Table Text Block] |
The contingent interest is accrued at the respective rate applied to the average trading price of the Trust PIERS for the five trading days ending on the respective date as outlined in the table below: | | | | | | | | | | | | | | Accrual Period | | Contingent Interest Rate | | Trading price period end date | | Cash interest paid per $50 stated liquidation amount of Trust PIERS | | Payment Date | Start Date | | End Date | | | | | December 15, 2013 | | March 14, 2014 | | 0.125% | | December 12, 2013 | | $ | 0.09 |
| | March 17, 2014 | March 15, 2014 | | June 14, 2014 | | 0.125% | | March 13, 2014 | | $ | 0.09 |
| | June 16, 2014 | June 15, 2014 | | September 15, 2014 | | 0.125% | | June 12, 2014 | | $ | 0.09 |
| | September 15, 2014 | September 15, 2014 | | December 14, 2014 | | 0.125% | | September 12, 2014 | | $ | 0.10 |
| | December 15, 2014 |
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| Fair Value, by Balance Sheet Grouping [Table Text Block] |
The fair value of the Company’s fixed-rate debt facilities, excluding the Interest Rate Swap Agreements, is based on quoted market prices (Level II) and is summarized as follows (in thousands): | | | | | | | | | | | | | | | | | | Fair Value of Financial Instruments | | | September 30, 2014 | | December 31, 2013 | Financial Instrument | | Book Value | | Market Value | | Book Value | | Market Value | 7.75% senior subordinated notes, due 2020 | | $ | 400,000 |
| | $ | 421,000 |
| | $ | 400,000 |
| | $ | 435,800 |
| 3.75% convertible senior subordinated notes, due 2025 | | |
| | |
| | |
| | |
| Carrying value | | 53,801 |
| | — |
| | 87,310 |
| | — |
| Unamortized debt discount | | 26,178 |
| | — |
| | 45,098 |
| | — |
| Principal amount | | 79,979 |
| | 180,800 |
| | 132,408 |
| | 306,500 |
| 4.00% junior subordinated convertible debentures, due 2033 | | |
| | |
| | |
| | |
| Carrying value | | 188,124 |
| | — |
| | 186,136 |
| | — |
| Unamortized debt discount | | 118,998 |
| | — |
| | 121,017 |
| | — |
| Principal amount | | 307,122 |
| | 468,300 |
| | 307,153 |
| | 455,900 |
| 3.25% convertible senior debentures, due 2035 | | |
| | |
| | |
| | |
| Carrying value | | 405,419 |
| | — |
| | 393,126 |
| | — |
| Unamortized debt discount | | 22,081 |
| | — |
| | 34,374 |
| | — |
| Principal amount | | 427,500 |
| | 450,000 |
| | 427,500 |
| | 457,400 |
| 3.75% convertible senior subordinated notes, due 2042 | | |
| | |
| | |
| | |
| Carrying value | | 226,389 |
| | — |
| | 225,014 |
| | — |
| Unamortized debt discount | | 163,611 |
| | — |
| | 164,986 |
| | — |
| Principal amount | | 390,000 |
| | 608,000 |
| | 390,000 |
| | 592,800 |
| 3.50% convertible senior subordinated notes, due 2044 | | | | | | | | | Carrying value | | 218,003 |
| | — |
| | 216,643 |
| | — |
| Unamortized debt discount | | 206,247 |
| | — |
| | 207,607 |
| | — |
| Principal amount | | 424,250 |
| | 469,600 |
| | 424,250 |
| | 428,500 |
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| Summary of Debt |
(in thousands): | | | | | | | | | | | | September 30,
2014 | | December 31,
2013 | Revolving credit facility, due 2017 | | $ | — |
| | $ | — |
| Senior term loan, due 2017 | | 382,500 |
| | 398,438 |
| 7.75% senior subordinated notes, due 2020 | | 400,000 |
| | 400,000 |
| 3.75% convertible senior subordinated notes, due 2025 | | 79,979 |
| | 132,408 |
| 4.00% junior subordinated convertible debentures, due 2033 | | 307,122 |
| | 307,153 |
| 3.25% convertible senior debentures, due 2035 | | 427,500 |
| | 427,500 |
| 3.75% convertible senior subordinated notes, due 2042 | | 390,000 |
| | 390,000 |
| 3.50% convertible senior subordinated notes, due 2044 | | 424,250 |
| | 424,250 |
| Capitalized lease and other debt obligations | | 14,906 |
| | 20,685 |
| Subtotal | | 2,426,257 |
| | 2,500,434 |
| Add interest rate swap agreements | | 18,041 |
| | 18,671 |
| (Subtract) unamortized debt discount | | (537,115 | ) | | (573,082 | ) | (Subtract) current portion of debt | | (495,713 | ) | | (527,204 | ) | Total long-term debt, net | | $ | 1,411,470 |
| | $ | 1,418,819 |
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| Convertible debt and related equity |
Information relating to the Company’s convertible securities at September 30, 2014 is in the following table: | | | | | | | | | | | Convertible Debt | | Carrying Value of Equity Component (in thousands) | | Remaining Amortization Period | | Effective Interest Rate | 3.75% convertible senior subordinated notes, due 2025 | | $ | 6,913 |
| | 11.25 | | 8.25 | % | 4.00% junior subordinated convertible debentures, due 2033 | | $ | 118,348 |
| | 18.75 | | 8.01 | % | 3.25% convertible senior debentures, due 2035 | | $ | 245,433 |
| | 1.25 | | 7.63 | % | 3.75% convertible senior subordinated notes, due 2042 | | $ | 167,941 |
| | 27.50 | | 7.30 | % | 3.50% convertible senior subordinated notes, due 2044 | | $ | 208,200 |
| | 29.40 | | 7.70 | % |
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