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Note 10 - Long-Term Debt (Tables) | 3 Months Ended
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Mar. 31, 2015
Long-term Debt, Unclassified [Abstract] |
Schedule of Long-term Debt Instruments [Table Text Block] | The carrying value of our long-term debt at March 31, 2015 and December 31, 2014 was as follows:
(In thousands) |  | March 31, 2015 |  | December 31, 2014
9.000% | Senior Notes due 2017 | $ | 192,870 |  |  | $ | 192,605 |
3.000% | Convertible Senior Notes due 2017 (1) | 381,018 |  |  | 375,310 |
2.250% | Convertible Senior Notes due 2019 (2) | 345,084 |  |  | 342,011 |
5.500% | Senior Notes due 2019 | 300,000 |  |  | 300,000 |
| Total long-term debt | $ | 1,218,972 |  |  | $ | 1,209,926 |
_______________________
(1) | The principal amount of these notes is $450 million.
(2) | The principal amount of these notes is $400 million.
Schedule of Liability and Equity Components of Convertible Debt [Table Text Block] | 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) | March 31, 2015 |  | December 31, 2014 |  | March 31, 2015 |  | December 31, 2014 |
Liability component: |  |  |  |  |  |  |  |
Principal | $ | 450,000 |  |  | $ | 450,000 |  |  | $ | 400,000 |  |  | $ | 400,000 |  |
Less: Debt discount, net (1) | (68,982 | ) |  | (74,690 | ) |  | (54,916 | ) |  | (57,989 | ) |
Net carrying amount | $ | 381,018 |  |  | $ | 375,310 |  |  | $ | 345,084 |  |  | $ | 342,011 |  |
Equity component of currently redeemable convertible senior notes | $ | 68,982 |  |  | $ | 74,690 |  |  | $ | — |  |  | $ | — |  |
__________________
(1) | Included within long-term debt and is being amortized over the life of the convertible notes.
Schedule of Interest Expense Recognized Related to Convertible Debt [Table Text Block] | 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 March 31,
($ in thousands) | 2015 |  | 2014
Contractual interest expense | $ | 3,375 |  |  | $ | 3,375 |
Amortization of debt issuance costs | 318 |  |  | 300 |
Amortization of debt discount | 5,708 |  |  | 5,186 |
Total interest expense | $ | 9,401 |  |  | $ | 8,861 |
Effective interest rate of the liability component | 9.75 | % |  | 9.75 | %
| Convertible Senior Notes due 2019
| Three Months Ended March 31,
($ in thousands) | 2015 |  | 2014
Contractual interest expense | $ | 2,250 |  |  | $ | 2,250 |
Amortization of debt issuance costs | 328 |  |  | 316 |
Amortization of debt discount | 3,073 |  |  | 2,889 |
Total interest expense | $ | 5,651 |  |  | $ | 5,455 |
Effective interest rate of the liability component | 6.25 | % |  | 6.25 | %

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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 835 -SubTopic 30 -Section 55 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=34725769&loc=d3e28878-108400 Reference 2: 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 3: 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=6451184&loc=d3e28551-108399 Reference 4: 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=6451184&loc=d3e28541-108399 Reference 5: 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 6: 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 7: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 22 -Article 5 Reference 8: 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 9: 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 Reference 10: 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 11: 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 + Details
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