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Note 12 - Long-Term Debt and Convertible Debentures (Tables) | 12 Months Ended
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Dec. 31, 2013
Disclosure Text Block [Abstract] |
Schedule of Debt [Table Text Block] |
|  | December 31, 2013 |  |  | December 31, 2012 |
Revolving credit facility |  | $ | 148,647 |  |  | $ | 230,740 |
3.84% Notes |  |  | 150,000 |  |  |  | - |
6.40% Notes |  |  | 25,000 |  |  |  | 37,500 |
5.44% Notes |  |  | 40,000 |  |  |  | 60,000 |
Unamortized gain on settlement of interest rate swaps |  |  | 107 |  |  |  | 229 |
Adjustments to long term debt resulting from interest rate swaps |  |  | (5,196 | ) |  |  | 358 |
Capital leases maturing at various dates through 2017 |  |  | 2,555 |  |  |  | 2,815 |
Other long-term debt maturing at various dates up to 2017 |  |  | 11,681 |  |  |  | 5,563 |
|  |  | 372,794 |  |  |  | 337,205 |
Less: current portion |  |  | 44,785 |  |  |  | 39,038 |
Long-term debt - non-current |  | $ | 328,009 |  |  | $ | 298,167 |
Convertible Debentures |  |  | - |  |  |  | 77,000 |
|  | $ | 328,009 |  |  | $ | 375,167 |
Schedule of Maturities of Long-term Debt [Table Text Block] |
| 2014 |  | $ | 44,785 |  |
| 2015 |  |  | 34,230 |  |
| 2016 |  |  | 346 |  |
| 2017 |  |  | 148,736 |  |
| 2018 and thereafter | 144,697 |  |

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- Definition Tabular disclosure of information pertaining to short-term and long-debt instruments or arrangements, including but not limited to identification of terms, features, collateral requirements and other information necessary to a fair presentation. + References No definition available. + 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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