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Long-Term Debt (Tables) | 12 Months Ended
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Dec. 31, 2016
Long-Term Debt [Abstract] |
Schedule of Long-Term Debt | Long-term debt at December 31, 2016 and 2015 consisted of the following (in thousands):
|  | 2016 |  |  | 2015 |
Long-term debt, including current portion: |  |  |  |  |  |
$550,000,000 revolving credit facility due April 30, 2020 |  | $ | 225,986 |  |  | $ | 278,834 |
$150,000,000 senior notes Series A due February 27, 2020 |  |  | 150,000 |  |  |  | 150,000 |
$350,000,000 senior notes Series B due February 27, 2023 |  |  | 350,000 |  |  |  | 350,000 |
$10,000,000 credit line due June 30, 2017 |  |  | — |  |  |  | — |
|  | $ | 725,986 |  |  | $ | 778,834 |
Unamortized debt issuance costs |  |  | (3,184 | ) |  |  | (3,985 | )
|  | $ | 722,802 |  |  | $ | 774,849 |
Schedule of Aggregate Payments due on the Long-Term Debt | The aggregate payments due on the long-term debt in each of the next five years were as follows (in thousands):
2017 |  | $ | — |
2018 |  |  | — |
2019 |  |  | — |
2020 |  |  | 375,986 |
2021 |  |  | — |
Thereafter |  |  | 350,000 |
|  | $ | 725,986 |

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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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