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DEBT AND FINANCING ARRANGEMENTS (Tables) | 12 Months Ended
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Dec. 31, 2017
Debt Disclosure [Abstract] |
Scheduled debt maturity | The scheduled maturity of the Company's aggregate amount of its debt obligation on its consolidated balance sheet at December 31, 2017 is shown in the following table :
| Year ended December 31, |  |
| 2018 | $ | — |  |
| 2019 | 250,000 |  |
| 2020 | 500,000 |  |
| 2021 | — |  |
| 2022 | — |  |
| After 2022 | 636,060 |  |
| Unamortized discount and debt issuance expenses | (9,531 | ) |
| Total senior notes and notes payable | $ | 1,376,529 |  |

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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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