Fair Value Measurements (Tables)

12 Months Ended

Dec. 31, 2015

Fair Value Measurements

Fair value of financial instruments

	December 31,
	2015					2014
	Effective Interest Rate	Carrying Value		Fair Value		Effective Interest Rate	Carrying Value		Fair Value
	(In thousands)
2.35% senior notes due September 2016	2.54%	$	347,955	$	347,708	2.56%	$	349,887	$	346,980
6.15% senior notes due February 2018	6.35%	921,162		935,962		6.42%	930,693		991,920
9.25% senior notes due January 2019	9.33%	339,607		342,575		9.33%	339,607		403,531
5.00% senior notes due September 2020	5.24%	683,839		617,409		5.20%	698,253		687,953
4.625% senior notes due September 2021	4.74%	698,628		581,630		4.75%	698,388		661,619
5.10% senior notes due September 2023	5.24%	349,021		280,907		5.26%	348,893		332,759
Term loan facility	1.39%	325,000		325,000		0.00%	—		—
Revolving credit facility	1.48%	—		—		3.47%	450,000		450,000
Commercial paper	0.56%	8,000		8,000		0.59%	533,119		533,119
Other	0.00%	6,508		6,508		0.00%	6,209		6,209
		3,679,720		$	3,445,699		4,355,049		$	4,414,090
Less: deferred financing costs		18,012					17,019
		$	3,661,708				$	4,338,030