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Note 11 - Long-Term Debt (Tables) | 9 Months Ended
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Sep. 30, 2016
Long-term Debt, Unclassified [Abstract] |
Schedule of Long-term Debt Instruments [Table Text Block] | The carrying value of our long-term debt at September 30, 2016 and December 31, 2015 was as follows:
(In thousands) |  | September 30, 2016 |  | December 31, 2015
9.000% | Senior Notes due 2017 | $ | — |  |  | $ | 192,261 |
3.000% | Convertible Senior Notes due 2017 | 20,600 |  |  | 46,115 |
2.250% | Convertible Senior Notes due 2019 | 61,374 |  |  | 341,214 |
5.500% | Senior Notes due 2019 | 296,611 |  |  | 295,751 |
5.250% | Senior Notes due 2020 | 345,003 |  |  | 344,113 |
7.000% | Senior Notes due 2021 | 344,078 |  |  | — |
| Total long-term debt | $ | 1,067,666 |  |  | $ | 1,219,454 |
Convertible Debt | The convertible notes are reflected on our condensed consolidated balance sheets as follows:
| Convertible Senior Notes due 2017 |  | Convertible Senior Notes due 2019
(In thousands) | September 30, 2016 |  | December 31, 2015 |  | September 30, 2016 |  | December 31, 2015
Liability component: |  |  |  |  |  |  |
Principal | $ | 22,233 |  |  | $ | 52,370 |  |  | $ | 68,024 |  |  | $ | 389,992 |
Debt discount, net (1) | (1,551 | ) |  | (5,941 | ) |  | (6,041 | ) |  | (44,313 | )
Debt issuance costs (1) | (82 | ) |  | (314 | ) |  | (609 | ) |  | (4,465 | )
Net carrying amount | $ | 20,600 |  |  | $ | 46,115 |  |  | $ | 61,374 |  |  | $ | 341,214 |
______________________
(1) | Included within long-term debt and is being amortized over the life of the convertible notes.
The following tables set forth total interest expense recognized related to the convertible notes for the periods indicated:
| Convertible Senior Notes due 2017
| Three Months Ended September 30, |  | Nine Months Ended September 30,
($ in thousands) | 2016 |  | 2015 |  | 2016 |  | 2015
Contractual interest expense | $ | 166 |  |  | $ | 456 |  |  | $ | 705 |  |  | $ | 6,953 |
Amortization of debt issuance costs | 17 |  |  | 43 |  |  | 71 |  |  | 659 |
Amortization of debt discount | 322 |  |  | 808 |  |  | 1,344 |  |  | 11,910 |
Total interest expense | $ | 505 |  |  | $ | 1,307 |  |  | $ | 2,120 |  |  | $ | 19,522 |
| Convertible Senior Notes due 2019
| Three Months Ended September 30, |  | Nine Months Ended September 30,
($ in thousands) | 2016 |  | 2015 |  | 2016 |  | 2015
Contractual interest expense | $ | 493 |  |  | $ | 2,250 |  |  | $ | 3,043 |  |  | $ | 6,750 |
Amortization of debt issuance costs | 74 |  |  | 317 |  |  | 447 |  |  | 975 |
Amortization of debt discount | 737 |  |  | 3,146 |  |  | 4,434 |  |  | 9,342 |
Total interest expense | $ | 1,304 |  |  | $ | 5,713 |  |  | $ | 7,924 |  |  | $ | 17,067 |

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- Definition Tabular disclosure of borrowings which can be exchanged for a specified number of another security at the option of the issuer or the holder. Disclosures include, but are not limited to, principal amount, amortized premium or discount, and amount of liability and equity components. + References No definition available. + Details
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- Definition Tabular disclosure of long-debt instruments or arrangements, including identification, terms, features, collateral requirements and other information necessary to a fair presentation. These are debt arrangements that originally required repayment more than twelve months after issuance or greater than the normal operating cycle of the entity, if longer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21475-112644 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 470 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6479336&loc=d3e64711-112823 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(e),(f)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 55 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=64930739&loc=d3e28878-108400 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21538-112644 Reference 7: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21506-112644 Reference 8: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 1A -URI http://asc.fasb.org/extlink&oid=64930785&loc=d3e28541-108399 Reference 9: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=64930785&loc=d3e28551-108399 Reference 10: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21521-112644 + Details
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