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Note 13 - Long-term Debt and Credit Arrangements - Schedule of Long-term Debt (Details) - USD ($) $ in Thousands | Sep. 30, 2021 | Dec. 31, 2020 | Sep. 30, 2020
--- | --- | --- | ---
Total debt | $ 339,910 | $ 338,800 | $ 413,897
Debt issuance costs and other | 8,742 | 7,247 | 7,166
Long-term Debt, Current Maturities, Total | 8,718 | 8,278 | 8,253
Long-term Debt, Excluding Current Maturities, Total | 331,192 | 330,522 | 405,644
Convertible Debt [Member] | The 2.75% Convertible Notes [Member] |  |  |
Total debt | 205,543 | 200,303 | 198,606
Term Loan [Member] | The Credit Agreement [Member] |  |  |
Total debt | 125,625 | 131,250 | 133,125
Long-term Debt, Current Maturities, Total | 7,500 | 7,500 | 7,500
Long-term Debt, Excluding Current Maturities, Total | 118,100 | 123,800 | 125,600
Line of Credit [Member] | The Credit Agreement [Member] | Revolving Credit Facility [Member] |  |  |
Total debt | $ 0 | $ 0 | $ 75,000

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