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Note 14 - Long-term Debt and Credit Arrangements - Schedule of Long-term Debt (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019	Sep. 30, 2019
Total debt	$ 413,897	$ 364,352	$ 403,104
Debt issuance costs and other	7,166	6,906	12,479
Long-term Debt, Current Maturities, Total	8,253	8,244	8,263
Long-term Debt, Excluding Current Maturities, Total	405,644	356,108	394,841
Convertible Debt [Member] | The 2.75% Convertible Notes [Member]
Total debt	198,606	193,696	0
Term Loan [Member] | The Credit Agreement [Member]
Total debt	133,125	138,750	140,625
Long-term Debt, Current Maturities, Total	7,500	7,500	7,500
Long-term Debt, Excluding Current Maturities, Total	125,600	131,300	133,100
Line of Credit [Member] | The Credit Agreement [Member] | Revolving Credit Facility [Member]
Total debt	$ 75,000	$ 25,000	$ 250,000

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- Definition

The amount or adjustment of other long-term debt.

+ References

No definition available.

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+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 20
-Section 50
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