Derivatives, Hedges, Financial Instruments and Carbon Credits (Tables)

3 Months Ended

Mar. 31, 2014

Derivative Instruments And Hedging Activities Disclosure [Abstract]

Assets and Liabilities Measured at Fair Value on Recurring Basis

The following details our assets and liabilities that are measured at fair value on a recurring basis at March 31, 2014 and December 31, 2013:


	Fair Value Measurements at
	March 31, 2014 Using
Description	Total Fair Value At March 31, 2014		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)		Total Fair Value at December 31, 2013
	(In Thousands)
Assets—Supplies, prepaid items and other:
Commodities contracts	$	730	$	—	$	730	$	—	$	31
Carbon credits		1,673		—		—		1,673		1,284

Total	$	2,403	$	—	$	730	$	1,673	$	1,315

Liabilities—Current and noncurrent accrued and other liabilities:
Contractual obligations—carbon credits	$	1,673		—		—		1,673		1,284
Interest rate contracts		1,100		—		1,100		—		1,240

Total	$	2,773	$	—	$	1,100	$	1,673	$	2,524

Reconciliation of Beginning and Ending Balances for Assets and Liabilities Measured at Fair Value on Recurring Basis

the following is a reconciliation of the beginning and ending balances for assets and liabilities measured at fair value on a recurring basis using significant unobservable inputs (Level 3):


	Assets						Liabilities
	Three Months Ended						Three Months Ended
	March 31,						March 31,
	2014			2013			2014			2013
	(In Thousands)
Beginning balance	$	1,284		$	91		$	(1,284	)	$	(91	)
Transfers into Level 3		—			—			—			—
Transfers out of Level 3		—			—			—			—
Total realized and unrealized gain (loss) included in operating results		1,925			233			(1,634	)		(233	)
Purchases		—			—			—			—
Issuances		—			—			—			—
Sales		(1,536	)		(12	)		—			—
Settlements		—			—			1,245			12

Ending balance	$	1,673		$	312		$	(1,673	)	$	(312	)

Total gains (losses) for the period included in operating results attributed to the change in unrealized gains or losses on assets and liabilities still held at the reporting date	$	1,004		$	221		$	(1,004	)	$	(221	)

Net Gains (Losses) Included in Operating Results and Classifications Within Statement of Operations

Net gains (losses) included in operating results and the classifications within the statement of operations are as follows:


	Three Months Ended
	March 31,
	2014			2013
	(In Thousands)
Total net gains (losses) included in operating results:
Cost of sales—Undesignated commodities contracts	$	2,216		$	(162	)
Other income—Carbon credits		1,925			233
Other expenses—Contractual obligations relating to carbon credits		(1,634	)		(233	)
Interest expense—Undesignated interest rate contract		(20	)		1

	$	2,487		$	(161	)