Debt and Credit Agreements

3 Months Ended

Mar. 31, 2017

The Company’s debt and credit agreements consisted of the following:



(In thousands)	March 31, 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	(7,130		)	(7,470		)
	$	1,520,870		$	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 March 31, 2017, the Company was in compliance with all restrictive financial covenants for both its revolving credit facility and senior notes. As of March 31, 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 March 31, 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 three months ended March 31, 2016 was approximately 2.3%.