Fair Value of Financial Instruments (Tables)

12 Months Ended

Dec. 31, 2015

Fair Value Disclosures [Abstract]

Summary of Carrying Values and Estimated Fair Values of Long-Term Debt and Commodity Purchase Contracts

The following is a summary of the carrying values and estimated fair values of our long-term debt and commodity purchase contracts as of December 31, 2015 and 2014:

	December 31, 2015						December 31, 2014
(In millions)	Carrying Value			Fair Value			Carrying Value			Fair Value
Level 1:
Long-term debt:
4.625 Notes (net of debt issuance costs totaling $9.6 million and $11.3 million at December 31, 2015 and 2014, respectively)	$	678.4		$	635.1		$	676.7		$	651.9
4.875 Notes (net of debt issuance costs totaling $5.8 million and $6.5 million at December 31, 2015 and 2014, respectively)	$	444.2		$	408.4		$	443.5		$	426.7
Level 2:
Long-term debt:
Term Loan Facility (net of debt issuance costs totaling $2.4 million at December 31, 2014)	$	—		$	—		$	192.1		$	194.4
New Term Loan Facility (net of deferred financing fees totaling $3.1 million at December 31, 2015)	$	244.4		$	247.8		$	—		$	—
Derivative instruments:
Commodity purchase contracts	$	(0.4	)	$	(0.4	)	$	(12.9	)	$	(12.9	)