Debt (Tables)

3 Months Ended

Mar. 31, 2014

Debt [Abstract]

Components Of Debt

	March 31,		December 31,
	2014		2013
	(in thousands)
Short-term debt:
7.15% Senior Notes due 2018	$	1,200	$	1,200
Total short-term debt		1,200		1,200
Long-term debt:
Variable rate (1.62% and 1.64% at March 31, 2014 and December 31, 2013, respectively) Credit Facility, expires December 2018		160,200		282,900
7.35% Senior Notes due 2017		15,000		15,000
7.125% Senior Notes due 2017		25,000		25,000
7.15% Senior Notes due 2018		28,200		28,200
7.5% Senior Notes due 2018		600,000		600,000
4.10% Senior Notes due 2022		1,000,000		1,000,000
Unamortized discount		(974)		(1,004)
Total long-term debt		1,827,426		1,950,096
Total debt	$	1,828,626	$	1,951,296