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Note 4 - Financing Arrangements - Outstanding Borrowings (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Less current portion of long-term debt	$ (247,609)
Long-term debt	752,423	1,085,649
Line of Credit [Member]
Long-term Debt, Total	167,200	241,400
Senior Notes [Member]
Long-term Debt, Total	$ 832,800	$ 844,200

X

- Definition

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

+ References

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X

- Definition

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.

+ References

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