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DEBT (Tables) | 12 Months Ended
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Dec. 31, 2016
Debt Instrument [Line Items] |
Schedule of debt | At December 31, 2016 and 2015, debt consisted of the following:
|  | December 31,
|  | 2016 |  | 2015
Long-term debt |  |  |  |
Senior Unsecured Notes due through 2045, interest at 2.8% to 4.0% (net of debt issuance costs of $1,586 and $853 at December 31, 2016 and 2015, respectively), swapped $100,000 to variable interest rates of 1.5% to 2.7% |  | $ | 692,975 |  |  | $ | 349,147 |
Other borrowings due through 2023, interest up to 8.0% |  | 10,860 |  |  | 2,656 |
|  | 703,835 |  |  | 351,803 |
Less current portion |  | 131 |  |  | 1,456 |
Long-term debt, less current portion |  | 703,704 |  |  | 350,347 |
Short-term debt |  |  |  |
Amounts due banks, interest at 29.0% (24.1% in 2015) |  | 1,758 |  |  | 2,822 |
Current portion long-term debt |  | 131 |  |  | 1,456 |
Total short-term debt |  | 1,889 |  |  | 4,278 |
Total debt |  | $ | 705,593 |  |  | $ | 354,625 |
Senior Notes 2015 [Member] |
Debt Instrument [Line Items] |
Schedule of debt | The maturity and interest rates of the 2015 Notes are as follows:
| Amount |  | Maturity Date |  | Interest Rate
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, 2045 |  | 4.02 | %
Senior Notes 2016 [Member] |
Debt Instrument [Line Items] |
Schedule of debt | The maturity and interest rates of the 2016 Notes are as follows:
| Amount |  | Maturity Date |  | Interest Rate
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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