Debt and Credit Agreements (Tables)

3 Months Ended

Mar. 31, 2017

Debt Disclosure [Abstract]

Debt and credit agreement components

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