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DEBT (Tables) | 12 Months Ended
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Dec. 31, 2019
Debt Instrument [Line Items] |
Schedule of debt | At December 31, 2019 and 2018, debt consisted of the following:
|  | December 31,
|  | 2019 |  | 2018
Long-term debt |  |  |  |
Senior Unsecured Notes due through 2045, interest at 2.8% to 4.0% (net of debt issuance costs of $1,282 and $1,392 at December 31, 2019 and 2018, respectively), swapped $50,000 to variable interest rates of 2.4% to 2.6% |  | $ | 701,681 |  |  | $ | 691,877 |
Other borrowings due through 2023, interest up to 2.0% |  | 10,733 |  |  | 10,783 |
|  | 712,414 |  |  | 702,660 |
Less current portion |  | 112 |  |  | 111 |
Long-term debt, less current portion |  | 712,302 |  |  | 702,549 |
Short-term debt |  |  |  |
Amounts due banks, weighted average interest at 4.9% in 2019 |  | 34,857 |  |  | — |
Current portion long-term debt |  | 112 |  |  | 111 |
Total short-term debt |  | 34,969 |  |  | 111 |
Total debt |  | $ | 747,271 |  |  | $ | 702,660 |
Senior Notes [Member] |
Debt Instrument [Line Items] |
Schedule of debt | The maturity and interest rates of the 2015 Notes and 2016 Notes are as follows:
| Amount |  | Maturity Date |  | Interest Rate
2015 Notes |  |  |  |  |
Series A | $ | 100,000 |  |  | August 20, 2025 |  | 3.15 | %
Series B | 100,000 |  |  | August 20, 2030 |  | 3.35 | %
Series C | 50,000 |  |  | April 1, 2035 |  | 3.61 | %
Series D | 100,000 |  |  | April 1, 2035 |  | 4.02 | %
2016 Notes |  |  |  |  |
Series A | $ | 100,000 |  |  | October 20, 2028 |  | 2.75 | %
Series B | 100,000 |  |  | October 20, 2033 |  | 3.03 | %
Series C | 100,000 |  |  | October 20, 2037 |  | 3.27 | %
Series D | 50,000 |  |  | October 20, 2041 |  | 3.52 | %

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