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Note 11 - Long-term Debt (Tables) | 12 Months Ended
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Dec. 31, 2017
Notes Tables |
Schedule of Debt [Table Text Block] |
|  |  | December 31, 2017 |  |  |  | December 31, 2016 |
Revolving credit facility |  | $ | 246,411 |  |  | $ | 259,081 |
Capital leases maturing at various dates through 2021 |  |  | 1,991 |  |  |  | 1,868 |
Other long-term debt maturing at various dates up to 2020 |  |  | 1,491 |  |  |  | 1,549 |
|  |  | 249,893 |  |  |  | 262,498 |
Less: current portion |  |  | 2,426 |  |  |  | 1,961 |
Long-term debt - non-current |  | $ | 247,467 |  |  | $ | 260,537 |
Schedule of Maturities of Long-term Debt [Table Text Block] |
2018 |  | $ | 2,426 |
2019 |  |  | 900 |
2020 |  |  | 142 |
2021 |  |  | 14 |
2022 and thereafter |  |  | 246,411 |

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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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