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Note 11 - Long-Term Debt Schedule of Long Term Debt (Details) - USD ($) $ / shares in Units, $ in Thousands |  | 1 Months Ended | 3 Months Ended | 9 Months Ended |  |
--- | --- | --- | --- | --- | --- | ---
Jan. 27, 2017 | Sep. 30, 2017 | Sep. 30, 2017 | Jun. 30, 2017 | Sep. 30, 2016 | Sep. 30, 2017 | Sep. 30, 2016 | Dec. 31, 2016 | Nov. 30, 2016
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Long-term debt |  | $ 1,026,806 | $ 1,026,806 |  |  | $ 1,026,806 |  | $ 1,069,537 |
Loss on induced conversion and debt extinguishment |  |  | $ (45,766) |  | $ (17,397) | (51,469) | $ (75,075) |  |
Proceeds from termination of capped calls |  |  |  |  |  | $ 4,109 | $ 0 |  |
Convertible Senior Notes Due 2017 |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Debt Instrument, Interest Rate, Stated Percentage |  | 3.00% | 3.00% |  |  | 3.00% |  |  |
Long-term debt |  | $ 521 | $ 521 |  |  | $ 521 |  | 20,947 |
Repayments of Convertible Debt |  |  |  | $ 31,600 |  |  |  |  |
Debt Instrument, Convertible, Carrying Amount of Equity Component |  | $ 100 | $ 100 |  |  | $ 100 |  | 5,000 |
Convertible Senior Notes Due 2019 |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Debt Instrument, Repurchase Amount | $ 68,000 |  |  |  |  |  |  |  |
Debt Instrument, Interest Rate, Stated Percentage |  | 2.25% | 2.25% |  |  | 2.25% |  |  |
Long-term debt |  | $ 0 | $ 0 |  |  | $ 0 |  | 62,013 |
Debt Instrument, Convertible, Conversion Price |  |  |  |  |  |  |  |  | $ 10.60
Repayments of Convertible Debt | 110,100 |  |  |  |  |  |  |  |
Loss on induced conversion and debt extinguishment | $ (4,500) |  |  |  |  |  |  |  |
Debt Instrument, Convertible, Carrying Amount of Equity Component |  |  |  |  |  |  |  | 13,100 |
Senior Notes Due 2019 [Member] |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Debt Instrument, Interest Rate, Stated Percentage |  | 5.50% | 5.50% |  |  | 5.50% |  |  |
Long-term debt |  | $ 157,470 | $ 157,470 |  |  | $ 157,470 |  | 296,907 |
Senior Notes Due 2020 |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Debt Instrument, Interest Rate, Stated Percentage |  | 5.25% | 5.25% |  |  | 5.25% |  |  |
Long-term debt |  | $ 231,618 | $ 231,618 |  |  | $ 231,618 |  | 345,308 |
Senior Notes Due 2021 |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Debt Instrument, Interest Rate, Stated Percentage |  | 7.00% | 7.00% |  |  | 7.00% |  |  |
Long-term debt |  | $ 194,974 | $ 194,974 |  |  | $ 194,974 |  | 344,362 |
Senior Notes due 2019, 2020, and 2021 [Member] |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Repayments of Senior Debt |  |  | $ 450,000 |  |  |  |  |  |
Senior Notes Due 2024 [Member] |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Debt Instrument, Interest Rate, Stated Percentage |  | 4.50% | 4.50% |  |  | 4.50% |  |  |
Long-term debt |  | $ 442,223 | $ 442,223 |  |  | $ 442,223 |  |  |
Senior Notes [Member] | Senior Notes Due 2019 [Member] |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Debt Instrument, Repurchase Amount |  | 141,400 | 141,400 |  |  | 141,400 |  |  |
Debt Instrument, Face Amount |  | 300,000 | 300,000 |  |  | 300,000 |  |  |
Long-term Debt, Gross |  | 158,600 | 158,600 |  |  | 158,600 |  |  |
Senior Notes [Member] | Senior Notes Due 2020 |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Debt Instrument, Repurchase Amount |  | 115,900 | 115,900 |  |  | 115,900 |  |  |
Long-term Debt, Gross |  | 234,100 | 234,100 |  |  | 234,100 |  |  |
Senior Notes [Member] | Senior Notes Due 2021 |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Debt Instrument, Repurchase Amount |  | 152,300 | 152,300 |  |  | 152,300 |  |  |
Long-term Debt, Gross |  | 197,700 | 197,700 |  |  | $ 197,700 |  |  |
Senior Notes [Member] | Senior Notes due 2019, 2020, and 2021 [Member] |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Loss on induced conversion and debt extinguishment |  |  | (45,800) |  |  |  |  |  |
Senior Notes [Member] | Senior Notes Due 2024 [Member] |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Debt Instrument, Basis Spread on Variable Rate |  |  |  |  |  | 0.50% |  |  |
Debt Instrument, Face Amount |  | 450,000 | $ 450,000 |  |  | $ 450,000 |  |  |
Proceeds from Issuance of Long-term Debt |  | $ 443,300 |  |  |  |  |  |  |
Debt Instrument, Redemption Price, Percentage |  |  |  |  |  | 100.00% |  |  |
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% |  |  | 80.00% |  |  |
Convertible Debt | Convertible Senior Notes Due 2017 |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Debt Instrument, Repurchase Amount |  |  |  | 21,600 |  |  |  |  |
Long-term debt |  | $ 521 | $ 521 |  |  | $ 521 |  | 20,947 |
Loss on induced conversion and debt extinguishment |  |  |  | $ (1,200) |  |  |  |  |
Long-term Debt, Gross |  | 526 | 526 |  |  | 526 |  | 22,233 |
Convertible Debt | Convertible Senior Notes Due 2019 |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Long-term debt |  | 0 | 0 |  |  | 0 |  | 62,013 |
Long-term Debt, Gross |  | $ 0 | $ 0 |  |  | $ 0 |  | $ 68,024 |

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- Definition This concept represents the percent of stock with ordinary voting rights that the company must retain in order to make any capital stock transactions under debt covenant agreement. + References No definition available. + Details
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- Definition Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt. + 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 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(16)) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(16)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 + Details
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