Fair Value Measurements (Tables)

12 Months Ended

Dec. 31, 2014

Fair Value Measurements

Schedule of recurring fair value measures

	Recurring Fair Value Measurements
	(in millions)
	Level 1		Level 2		Level 3		Total
As of December 31, 2014
Derivative Assets	$	—	$	191.8	$	—	$	191.8
Derivative Liabilities		—		(38.5)		—		(38.5)
Total	$	—	$	153.3	$	—	$	153.3

	Recurring Fair Value Measurements
	(in millions)
	Level 1		Level 2		Level 3		Total
As of December 31, 2013
Derivative Assets	$	—	$	25.4	$	—	$	25.4
Derivative Liabilities		—		(36.2)		—		(36.2)
Total	$	—	$	(10.8)	$	—	$	(10.8)

Schedule of carrying value and fair value of 2017 Senior Notes

	December 31,		December 31,
	2014		2013
	(in thousands)
2017 Senior Notes
Carrying Value, net of discount	$	348,669	$	348,040
Fair Value	$	190,400	$	327,698
2019 Senior Notes
Carrying Value, net of discount	$	293,064	$	—
Fair Value	$	184,932	$	—
2020 Senior Notes
Carrying Value, net of discount	$	105,234	$	—
Fair Value	$	73,311	$	—