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Long-Term Debt (Tables) | 6 Months Ended
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Jun. 30, 2017
Debt Disclosure [Abstract] |
Schedule of Debt |
(In thousands) | June 30, 2017 |  | December 31, 2016
2006 Senior Notes payable through 2021, 5.41%, net of debt issuance costs | $ | 33,333 |  |  | $ | 33,333 |
2010 Senior Notes payable through 2021, 4.00%, net of debt issuance costs | 100,000 |  |  | 100,000 |
2016 Senior Notes payable through 2031, 3.40%, net of debt issuance costs | 71,448 |  |  | 67,713 |
Senior revolving credit facility maturing in 2020, net of debt issuance costs | 64,564 |  |  | 189,456 |
Total | 269,345 |  |  | 390,502 |
Amounts due within one year, net of debt issuance costs | 26,666 |  |  | 26,666 |
Long-term debt, net of debt issuance costs | $ | 242,679 |  |  | $ | 363,836 |

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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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