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Note 10 - Long-Term Debt Schedule of Long Term Debt (Details) - USD ($) $ / shares in Units, $ in Thousands, shares in Millions | 1 Months Ended | 3 Months Ended |
--- | --- | --- | ---
Mar. 31, 2016 | Mar. 31, 2016 | Mar. 31, 2015 | Dec. 31, 2015
Debt Instrument [Line Items] |  |  |  |
Long-term debt | $ 1,286,466 | $ 1,286,466 |  | $ 1,219,454
Loss on induced conversion and debt extinguishment |  | $ (55,570) | $ 0 |
Senior Notes Due 2017 |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Debt Instrument, Interest Rate, Stated Percentage | 9.00% | 9.00% |  |
Long-term debt | $ 192,783 | $ 192,783 |  | 192,261
Convertible Senior Notes Due 2017 |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Debt Instrument, Interest Rate, Stated Percentage | 3.00% | 3.00% |  |
Long-term debt | $ 19,931 | $ 19,931 |  | 46,115
Debt Instrument, Repurchase Amount | $ 30,100 | $ 30,100 |  |
Convertible Debt, Termination of Capped Call Transaction, Number of Shares Received | 0.2 |  |  |
Convertible Debt, Termination of Capped Call Transaction, Total Consideration | $ 2,600 |  |  |
Convertible Debt, Termination of Capped Call Transaction, Closing Stock Price | $ 11.86 | $ 11.86 |  |
Convertible Debt [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Loss on induced conversion and debt extinguishment |  | $ (55,600) |  |
Loss on induced conversion and debt extinguishment (Note 10) |  | $ 39,700 |  |
Losses on Extinguishment of Debt | $ (14,800) |  |  |
Write off of Deferred Debt Issuance Cost | $ 1,100 |  |  |
Convertible Senior Notes Due 2019 |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Debt Instrument, Interest Rate, Stated Percentage | 2.25% | 2.25% |  |
Long-term debt | $ 89,785 | $ 89,785 |  | 341,214
Debt Instrument, Repurchase Amount | $ 288,400 | $ 288,400 |  |
Senior Notes Due 2019 |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Debt Instrument, Interest Rate, Stated Percentage | 5.50% | 5.50% |  |
Long-term debt | $ 296,033 | $ 296,033 |  | 295,751
Senior Notes Due 2020 |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Debt Instrument, Interest Rate, Stated Percentage | 5.25% | 5.25% |  |
Long-term debt | $ 344,406 | $ 344,406 |  | 344,113
Senior Notes Due 2021 |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Debt Instrument, Interest Rate, Stated Percentage | 7.00% | 7.00% |  |
Long-term debt | $ 343,528 | $ 343,528 |  | 0
Long-term debt, Gross | $ 350,000 | 350,000 |  |
Proceeds from Issuance of Long-term Debt |  | $ 343,500 |  |
Debt Instrument, Redemption Price, Percentage |  | 100.00% |  |
Debt Instrument, Basis Spread on Variable Rate |  | 0.50% |  |
Percent of Stock With Ordinary Voting Rights That Company Must Retain In Order To Make Any Capital Stock Transactions Under Debt Covenant Agreement | 80.00% | 80.00% |  |
Convertible Debt [Member] |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Payments of Debt Extinguishment Costs | $ 191,500 |  |  |
Debt Conversion, Converted Instrument, Shares Issued | 17.0 |  |  |
Convertible Debt [Member] | Convertible Senior Notes Due 2017 |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Long-term debt | $ 19,931 | $ 19,931 |  | 46,115
Long-term debt, Gross | 22,233 | 22,233 |  | 52,370
Debt Instrument, Repurchase Amount | 30,100 | 30,100 |  |
Convertible Debt [Member] | Convertible Senior Notes Due 2019 |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Long-term debt | 89,785 | 89,785 |  | 341,214
Long-term debt, Gross | 101,581 | 101,581 |  | $ 389,992
Debt Instrument, Repurchase Amount | $ 288,400 | $ 288,400 |  |

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- Definition The number of shares issued in exchange for the original debt being converted in a noncash (or part noncash) transaction. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or payments in the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4332-108586 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4304-108586 + Details
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