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Debt and Credit Agreements | 6 Months Ended
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Jun. 30, 2017
Debt Disclosure [Abstract] |
Debt and Credit Agreements | Debt and Credit Agreements The Company’s debt and credit agreements consisted of the following:
(In thousands) |  | June 30, 2017 |  | December 31, 2016
6.51% weighted-average senior notes |  | $ | 361,000 |  |  | $ | 361,000 |
9.78% senior notes |  | 67,000 |  |  | 67,000 |
5.58% weighted-average senior notes |  | 175,000 |  |  | 175,000 |
3.65% weighted-average senior notes |  | 925,000 |  |  | 925,000 |
|  | 1,528,000 |  |  | 1,528,000 |
Unamortized debt issuance costs |  | (6,789 | ) |  | (7,470 | )
|  | $ | 1,521,211 |  |  | $ | 1,520,530 |
The borrowing base under the terms of the Company's revolving credit facility is redetermined annually in April. In addition, either the Company or the banks may request an interim redetermination twice a year or in connection with certain acquisitions or divestitures of oil and gas properties. Effective April 11, 2017, the borrowing base and available commitments were reaffirmed at $3.2 billion and $1.7 billion, respectively. At June 30, 2017, the Company was in compliance with all restrictive financial covenants for both its revolving credit facility and senior notes. As of June 30, 2017, based on the Company's asset coverage and leverage ratios, there were no interest rate adjustments required for the Company's senior notes. At June 30, 2017, the Company had no borrowings outstanding under its revolving credit facility and had unused commitments of $1.7 billion. The Company’s weighted-average effective interest rate for the revolving credit facility for the six months ended June 30, 2016 was approximately 2.3%.

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- Definition The entire disclosure for long-term debt. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -URI http://asc.fasb.org/topic&trid=2208564 + Details
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