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Financial Instruments | 12 Months Ended
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Dec. 31, 2020
Long-term Debt and Lease Obligation [Abstract] |
Financial Instruments | 17. Financial Instruments Long-term debt, principally to banks and noteholders, consists of:
(in thousands, except interest rates) |  | 2020 |  | 2019
Revolving credit agreement with borrowings outstanding at an end of period interest rate of 3.50% in 2020 and 3.43% in 2019 (including the effect of interest rate hedging transactions, as described below), due in 2024 |  | $ | 398,000 |  |  | $ | 424,000 |
Other debt, at an average end of period rate of 5.50% in both 2020 and 2019, due in varying amounts through 2021 |  | 9 |  |  | 29 |
Long-term debt |  | 398,009 |  |  | 424,029 |
Less: current portion |  | (9) |  |  | (20) |
Long-term debt, net of current portion |  | $ | 398,000 |  |  | $ | 424,009 |
Principal payments of $398 million are due on long-term debt in 2024. Cash payments of interest amounted to $15.1 million in 2020, $17.4 million in 2019 and $18.8 million in 2018. On October 27, 2020, we entered into a $700 million unsecured Four-Year Revolving Credit Facility Agreement (the “Credit Agreement”) which amended and restated the prior amended and restated $685 million Five-Year Revolving Credit Facility Agreement, which we had entered into on November 7, 2017 (the “Prior Agreement”). Under the Credit Agreement, $398 million of borrowings were outstanding as of December 31, 2020. The applicable interest rate for borrowings was LIBOR plus a spread, based on our leverage ratio at the time of borrowing. At the time of the last borrowing on December 30, 2020, the spread was 1.625%. The spread was based on a pricing grid, which ranged from 1.500% to 2.000%, based on our leverage ratio. Based on our maximum leverage ratio and our Consolidated EBITDA, and without modification to any other credit agreements, as of December 31, 2020, we would have been able to borrow an additional $302 million under the Agreement. The Credit Agreement contains customary terms, as well as affirmative covenants, negative covenants and events of default that are comparable to those in the Prior Agreement. The Borrowings are guaranteed by certain of the Company’s subsidiaries. Our ability to borrow additional amounts under the Credit Agreement is conditional upon the absence of any defaults, as well as the absence of any material adverse change (as defined in the Credit Agreement). On November 27, 2017, we terminated our interest rate swap agreements, originally entered into on May 9, 2016, that had effectively fixed the interest rate on $300 million of revolving credit borrowings, in order to enter into a new interest rate swap with a greater notional amount, and the same maturity as the Credit Agreement. We received $6.3 million when the swap agreements were terminated and that payment will be amortized into interest expense through March 2021. On May 6, 2016, we terminated other interest rate swap agreements that had effectively fixed the interest rate on $120 million of revolving credit borrowings, in order to enter into a new interest rate swap with a greater notional amount, and the same maturity as the Credit Agreement. We paid $5.2 million to terminate the swap agreements, which were fully amortized into interest expense through June 2020. On November 28, 2017, we entered into interest rate swap agreements for the period December 18, 2017 through October 17, 2022. These transactions have the effect of fixing the LIBOR portion of the effective interest rate (before addition of the spread) on $350 million of indebtedness drawn under the Credit Agreement at the rate of 2.11% during the period. Under the terms of these transactions, we pay the fixed rate of 2.11% and the counterparties pay a floating rate based on the one-month LIBOR rate at each monthly calculation date, which on December 16, 2020 was 0.16%, during the swap period. On December 16, 2020, the all-in-rate on the $350 million of debt was 3.735%. These interest rate swaps are accounted for as a hedge of future cash flows, as further described in Note 18. No cash collateral was received or pledged in relation to the swap agreements. Under the Credit Agreement, we are currently required to maintain a leverage ratio (as defined in the agreement) of not greater than 3.50 to 1.00 and minimum interest coverage (as defined) of 3.00 to 1.00. As of December 31, 2020, our leverage ratio was 1.34 to 1.00 and our interest coverage ratio was 14.39 to 1.00. We may purchase our Common Stock or pay dividends to the extent our leverage ratio remains at or below 3.50 to 1.00, and may make acquisitions with cash provided our leverage ratio does not exceed the limits noted above. Indebtedness under the Credit Agreement is ranked equally in right of payment to all unsecured senior debt. We were in compliance with all debt covenants as of December 31, 2020.

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- Definition The entire disclosure for long-term debt. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -URI http://asc.fasb.org/topic&trid=2208564 + Details
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