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Note 3 - Long-term Debt (Tables) | 12 Months Ended
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Dec. 31, 2016
Notes Tables |
Schedule of Long-term Debt Instruments [Table Text Block] |
|  | December 31, |
|  | 2016 |  |  | 2015 |
Long-term debt including current portion: |  |  |  |  |  |  |  |
2014 Senior Credit Facility |  | $ | 556,438 |  |  | $ | 556,438 |
2020 Notes |  |  | - |  |  |  | 675,000 |
2024 Notes |  |  | 525,000 |  |  |  | - |
2026 Notes |  |  | 700,000 |  |  |  | - |
Total outstanding principal |  |  | 1,781,438 |  |  |  | 1,231,438 |
Unamortized deferred loan costs - 2014 Senior Credit Facility |  |  | (12,158 | ) |  |  | (6,136 | )
Unamortized deferred loan costs - 2020 Notes |  |  | - |  |  |  | (9,317 | )
Unamortized deferred loan costs - 2024 Notes |  |  | (7,742 | ) |  |  | - |
Unamortized deferred loan costs - 2026 Notes |  |  | (10,588 | ) |  |  | - |
Unamortized premium - 2020 Notes |  |  | - |  |  |  | 4,099 |
Unamortized premium - 2026 Notes |  |  | 5,797 |  |  |  | - |
Net carrying value |  | $ | 1,756,747 |  |  | $ | 1,220,084 |
Borrowing availability under the Revolving Credit Facility |  | $ | 60,000 |  |  | $ | 50,000 |
Schedule of Maturities of Long-term Debt [Table Text Block] |
|  | Minimum Principal Maturities |
|  | 2014 Senior |  |  | 2024 |  |  | 2026 |  |  |  |  |
Year |  | Credit Facility (1) |  |  | Notes |  |  | Notes |  |  | Total |
2017 |  | $ | - |  |  | $ | - |  |  | $ | - |  |  | $ | - |
2018 |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |
2019 |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |
2020 |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |
2021 |  |  | 556,438 |  |  |  | - |  |  |  | - |  |  |  | 556,438 |
Thereafter |  |  | - |  |  |  | 525,000 |  |  |  | 700,000 |  |  |  | 1,225,000 |
Total |  | $ | 556,438 |  |  | $ | 525,000 |  |  | $ | 700,000 |  |  | $ | 1,781,438 |

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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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- Definition Tabular disclosure of the combined aggregate amount of maturities and sinking fund requirements for all long-term borrowings for each of the five years following the date of the latest balance sheet date presented. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6802200&loc=d3e1835-112601 + Details
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