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DEBT (Tables) | 12 Months Ended
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Dec. 31, 2016
Schedule Of Debt Outstanding | Debt outstanding consists of the following (in thousands):
|  | December 31, |
|  | 2016 |  |  | 2015 |
$900.0 Million Revolving Credit Facility, principal due at maturity in July 2020; interest payable periodically at variable interest rates. The weighted average rate at December 31, 2016 and 2015 was 2.2% and 1.9%, respectively. |  | $ | 435,000 |  |  | $ | 439,000 |
Term Loan, scheduled principal payments through maturity in July 2020; interest payable periodically at variable interest rates. The rate at December 31, 2016 and 2015 was 2.3% and 2.0%, respectively. Unamortized debt issuance costs amounted to $0.4 million and $0.6 million at December 31, 2016 and 2015, respectively. |  |  | 95,000 |  |  |  | 100,000 |
4.625% Senior Notes, principal due at maturity in May 2023; interest payable semi-annually in May and November at 4.625%. Unamortized debt issuance costs amounted to $3.9 million and $4.5 million at December 31, 2016 and 2015, respectively. |  |  | 350,000 |  |  |  | 350,000 |
4.125% Senior Notes, principal due at maturity in April 2020; interest payable semi-annually in April and October at 4.125%. Unamortized debt issuance costs amounted to $2.7 million and $3.5 million at December 31, 2016 and 2015, respectively. |  |  | 325,000 |  |  |  | 325,000 |
5.0% Senior Notes, principal due at maturity in October 2022; interest payable semi-annually in April and October at 5.0%. Unamortized debt issuance costs amounted to $2.8 million and $3.3 million at December 31, 2016 and 2015, respectively. |  |  | 250,000 |  |  |  | 250,000 |
Total debt |  |  | 1,455,000 |  |  |  | 1,464,000 |
Unamortized debt issuance costs |  |  | (9,831 | ) |  |  | (11,923 | )
Current portion of long-term debt |  |  | (10,000 | ) |  |  | (5,000 | )
Long-term debt, net |  | $ | 1,435,169 |  |  | $ | 1,447,077 |
Schedule of Principal Payments | Scheduled principal payments as of December 31, 2016 for the next five years and thereafter were as follows (in thousands):
2017 |  | $ | 10,000 |
2018 |  |  | 10,000 |
2019 |  |  | 15,000 |
2020 |  |  | 820,000 |
2021 |  |  | — |
Thereafter |  |  | 600,000 |
Total debt |  | $ | 1,455,000 |

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- Definition Tabular disclosure of information pertaining to short-term and long-debt instruments or arrangements, including but not limited to identification of terms, features, collateral requirements and other information necessary to a fair presentation. + References No definition available. + Details
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- Definition Tabular disclosure of the combined aggregate amount of maturities and sinking fund requirements for all long-term borrowings for each of the five years following the date of the latest balance sheet date presented. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6802200&loc=d3e1835-112601 + Details
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