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

12 Months Ended

Dec. 31, 2016

Derivative Instruments And Hedging Activities Disclosure [Abstract]

Assets and Liabilities Measured at Fair Value on Recurring Basis

The following details our assets and liabilities associated with continuing operations that are measured at fair value on a recurring basis at December 31, 2016 and 2015:

			Fair Value Measurements at December 31, 2016 Using
Description	Total Fair Value at December 31, 2016		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, 2015
	(In Thousands)
Assets - Supplies, prepaid items and other:
Commodities contracts (1)	$	—	$	—	$	—	$	—	$	195
Carbon credits		—		—		—		—		1,154
Total	$	—	$	—	$	—	$	—	$	1,349

Liabilities - Current and noncurrent accrued and other liabilities:
Commodities contracts (1)	$	—	$	—	$	—	$	—	$	202
Contractual obligations - carbon credits		—		—		—		—		1,154
Embedded derivative		2,557		—		—		2,557		3,308
Interest rate contracts		—		—		—		—		126
Foreign exchange contracts		1		—		1		—		6
Total	$	2,558	$	—	$	1	$	2,557	$	4,796

(1)	The $195,000 was subject to an agreement that allowed net settlement of contracts; however, we have chosen to present the fair values of our commodities contracts under master netting agreements using a gross fair value presentation.

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
	2016			2015			2014			2016			2015			2014
	(In Thousands)
Beginning balance	$	1,154		$	2,779		$	1,284		$	(1,154	)	$	(2,779	)	$	(1,284	)
Transfers into Level 3		—			—			—			(5,817	)		—			—
Transfers out of Level 3		—			—			—			—			—			—

Total realized and unrealized gains (losses) included in operating results		1,256			2,351			3,089			802			(1,447	)		(2,799	)
Purchases		—			—			—			—			—			—
Issuances		—			—			—			—			—			—
Sales		(2,410	)		(3,976	)		(1,594	)		—			—			—
Settlements		—			—			—			3,612			3,072			1,304
Ending balance	$	—		$	1,154		$	2,779		$	(2,557	)	$	(1,154	)	$	(2,779	)

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	$	—		$	1,143		$	2,110		$	(983	)	$	(1,143	)	$	(2,110	)

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

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

	2016			2015			2014
	(In Thousands)
Total net gains (losses) included in operating results:
Cost of sales - Undesignated commodities contracts	$	140		$	(3,376	)	$	(947	)
Cost of sales - Undesignated foreign exchange contracts		5			(72	)		(49	)
Other income - Carbon credits		1,514			3,663			3,089
Other expense - Contractual obligations relating to carbon credits		(982	)		(2,759	)		(2,799	)
Non-operating other expense - embedded derivative		(983	)		(520	)		—
Interest expense - Undesignated interest rate contracts		—			(47	)		(71	)
Total net losses included in operating results	$	(306	)	$	(3,111	)	$	(777	)

Schedule of Carrying Values and Estimated Fair Values of Financial Instruments

At December 31, 2016 and 2015, we did not have any financial instruments with fair values significantly different from their carrying amounts (which excludes issuance costs, if applicable), except for the Senior Secured Notes as shown below.

	2016				2015
	Carrying		Estimated		Carrying		Estimated
	Amount		Fair Value		Amount		Fair Value
	(In Millions)
Senior Secured Notes (1)	$	375	$	356	$	425	$	355

(1)	Based on a quoted price of 94.88 at December 31, 2016 and 83.65 at December 31, 2015.