Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2015

Accounting Policies [Abstract]

Schedule of earnings per share

The following table reconciles basic and diluted EPS amounts:

	Years Ended December 31,
(In thousands, except per share data)	2015		2014		2013
Basic earnings (loss) per share:
Net income (loss)	$	1,172,000	$	251,949	$	(49,848	)
Weighted average common shares outstanding	339,552		338,523		311,754
Basic income (loss) per share	$	3.45	$	0.74	$	(0.16	)
Diluted earnings (loss) per share:
Net income (loss)	$	1,172,000	$	251,949	$	(49,848	)
Interest expense, net of tax (1):
2% Convertible Senior Notes due 2020	7,928		12,197		—
5% Convertible Senior Notes due 2017	12,228		—		—
9% Convertible Junior Subordinated Debentures due 2063	22,786		—		—
Diluted income available to common shareholders	$	1,214,942	$	264,146	$	(49,848	)
Weighted-average shares - Basic	339,552		338,523		311,754
Effect of dilutive securities:
Unvested restricted stock units	2,113		3,082		—
2% Convertible Senior Notes due 2020	71,917		71,917		—
5% Convertible Senior Notes due 2017	25,603		—		—
9% Convertible Junior Subordinated Debentures due 2063	28,854		—		—
Weighted-average shares - Diluted	468,039		413,522		311,754
Diluted income (loss) per share	$	2.60	$	0.64	$	(0.16	)
Anti-dilutive securities (in millions)	—		54.5		130.1

(1) The year ended December 31, 2015 has been tax effected at a rate of 35%. Due to the valuation allowance recorded against deferred tax assets the year ended December 31, 2014 was not tax effected.