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Financial Instruments (Tables) | 3 Months Ended
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Mar. 31, 2019
Debt Disclosure [Abstract] |
Schedule of Long-Term Debt | Long-term debt, principally to banks and noteholders, consists of:
(in thousands, except interest rates) |  | March 31, 2019 | December 31, 2018
Revolving credit agreement with borrowings outstanding at an end of period interest rate of 3.61% in 2019 and 3.69% in 2018 (including the effect of interest rate hedging transactions, as described below), due in 2022 | $491,000 | $499,000
Finance obligation |  | - | 25,886
Other debt, at an average end of period rate of 5.50% in both 2019 and 2018, due in varying amounts through 2021 | 41 | 45
Long-term debt |  | 491,041 | 524,931
Less: current portion |  | (19) | (1,224)
Long-term debt, net of current portion |  | $491,022 | $523,707

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