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SHORT-TERM DEBT (Tables) | 12 Months Ended
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Dec. 31, 2017
Short-term Debt [Abstract] |
Schedule of Short-term Debt | Short-term debt consisted of the following (in thousands of dollars):
| As of December 31,
| 2017 |  | 2016
Lines of Credit |  |  |
Outstanding at December 31 | $ | 55,603 |  |  | $ | 16,392 |
Maximum month-end balance during the year | $ | 55,621 |  |  | $ | 24,722 |
Weighted average interest rate during the year | 2.41 | % |  | 4.04 | %
Weighted average interest rate at December 31 | 2.01 | % |  | 5.13 | %
Commercial Paper |  |  |
Outstanding at December 31 | $ | — |  |  | $ | 369,748 |
Maximum month-end balance during the year | $ | 454,696 |  |  | $ | 629,712 |
Weighted average interest rate during the year | 0.83 | % |  | 0.50 | %
Weighted average interest rate at December 31 | — | % |  | 0.69 | %

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- Definition Tabular disclosure of short-term debt arrangements (having initial terms of repayment within one year or the normal operating cycle, if longer) including: (1) description of the short-term debt arrangement; (2) identification of the lender or type of lender; (3) repayment terms; (4) weighted average interest rate; (5) carrying amount of funds borrowed under the specified short-term debt arrangement as of the balance sheet date; (6) description of the refinancing of a short-term obligation when that obligation is excluded from current liabilities in the balance sheet; and (7) amount of a short-term obligation that has been excluded from current liabilities in the balance sheet because of a refinancing of the obligation. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- References No definition available. + Details
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