Note 15 - Long-term Debt and Credit Arrangements - Schedule of Long-term Debt (Details) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021	Jun. 30, 2021
Total debt	$ 288,230	$ 339,918	$ 339,931
Debt issuance costs and other	8,230	8,814	8,660
Less current maturities	1,429	8,727	8,709
Total long-term debt	286,801	331,191	331,222
Convertible Debt [Member] \| The 2.75% Convertible Notes [Member]
Total debt	230,000	207,354	203,771
Term Loan [Member] \| The Credit Agreement [Member]
Total debt	0	123,750	127,500
Line of Credit [Member] \| The Credit Agreement [Member] \| Revolving Credit Facility [Member]
Total debt	$ 50,000	$ 0	$ 0

The amount or adjustment of other long-term debt.

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Amount, excluding unamortized premium (discount) and debt issuance cost, of long-term debt. Excludes lease obligation.

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Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt, classified as current. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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Amount, excluding unamortized premium (discount) and debt issuance cost, of long-term debt classified as noncurrent. Excludes lease obligation.

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