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DEBT (Table) | 12 Months Ended
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Dec. 31, 2017
Debt Instruments [Abstract] |
Summary of Debt | Debt consists of the following as of December 31:
(In thousands) |  | 2017 |  | 2017 |  | 2016 |  | 2016
|  | Carrying Value |  | Estimated Fair Value |  | Carrying Value |  | Estimated Fair Value
5.51% Senior notes due 2017 |  | — |  | — |  | 150,000 |  | 154,509
3.84% Senior notes due 2021 |  | 100,000 |  | 102,472 |  | 100,000 |  | 102,463
3.70% Senior notes due 2023 |  | 225,000 |  | 228,783 |  | 225,000 |  | 226,946
3.85% Senior notes due 2025 |  | 100,000 |  | 102,164 |  | 100,000 |  | 100,338
4.24% Senior notes due 2026 |  | 200,000 |  | 208,873 |  | 200,000 |  | 203,592
4.05% Senior notes due 2028 |  | 75,000 |  | 76,997 |  | 75,000 |  | 74,630
4.11% Senior notes due 2028 |  | 100,000 |  | 103,226 |  | 100,000 |  | 99,876
Other debt |  | 150 |  | 150 |  | 668 |  | 668
Total debt |  | 800,150 |  | 822,665 |  | 950,668 |  | 963,022
Debt issuance costs, net |  | (831) |  | (831) |  | (984) |  | (984)
Unamortized interest rate swap proceeds |  | 14,820 |  | 14,820 |  | 16,614 |  | 16,614
Total debt, net |  | 814,139 |  | 836,654 |  | 966,298 |  | 978,652
Less: current portion of long-term debt and short-term debt |  | 150 |  | 150 |  | 150,668 |  | 150,668
Total long-term debt |  | $813,989 |  | $836,504 |  | $815,630 |  | $827,984
Aggregate Maturities of Debt | Aggregate maturities of debt are as follows:
(In thousands) |
2018 | $ | 150 |
2019 | — |
2020 | — |
2021 | 100,000 |
2022 | — |
Thereafter | 700,000 |
Total | $ | 800,150 |

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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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