Fair Value Measurements (Tables)

12 Months Ended

Dec. 31, 2016

Fair Value Measurements

Fair value of financial instruments

	As of December 31,
	2016						2015
	Effective						Effective
	Interest		Carrying		Fair		Interest		Carrying		Fair
	Rate		Value		Value		Rate		Value		Value
	(In thousands, except rates)
2.35% senior notes due September 2016	—	%	$	—	$	—	2.54	%	$	347,955	$	347,708
6.15% senior notes due February 2018	6.40	%		827,539		865,300	6.35	%		921,162		935,962
9.25% senior notes due January 2019	9.33	%		303,489		337,443	9.33	%		339,607		342,575
5.00% senior notes due September 2020	5.21	%		669,540		689,211	5.24	%		683,839		617,409
4.625% senior notes due September 2021	4.75	%		694,868		708,765	4.74	%		698,628		581,630
5.50% senior notes due January 2023	5.85	%		600,000		627,000	—	%		—		—
5.10% senior notes due September 2023	5.26	%		346,448		348,613	5.24	%		349,021		280,907
Term loan facility	1.76	%		162,500		162,500	1.39	%		325,000		325,000
Revolving credit facility	1.86	%		—		—	1.48	%		—		—
Commercial paper	1.16	%		—		—	0.56	%		8,000		8,000
Other	—	%		297		297	—	%		6,508		6,508
				3,604,681	$	3,739,129				3,679,720	$	3,445,699
Less: Deferred financing costs				26,049						18,012
			$	3,578,632					$	3,661,708