Derivative instruments (Tables)

9 Months Ended

Sep. 30, 2015

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Schedule of derivative instruments, gain (losses)

The gains and losses on derivative instruments were as follows:

	Three Months Ended					Nine Months Ended
	September 30,					September 30,
	2015		2014			2015			2014
	(In thousands)
Commodity derivatives designated as cash flow hedges:
Amount of (gain) loss reclassified from accumulated other comprehensive loss into discontinued operations (effective portion), net of tax	$	—	$	(18	)	$	—		$	140
Interest rate derivatives designated as cash flow hedges:
Amount of loss reclassified from accumulated other comprehensive loss into interest expense (effective portion), net of tax	100		100			299			299
Commodity derivatives not designated as hedging instruments:
Amount of gain (loss) recognized in discontinued operations, before tax	9,607		28,755			(9,702		)	16,847

Derivative instruments

The location and fair value of the gross amount of the Company's derivative instruments on the Consolidated Balance Sheets were as follows:

Asset Derivatives	Location on Consolidated Balance Sheets	Fair Value at September 30, 2015		Fair Value at September 30, 2014		Fair Value at December 31, 2014
		(In thousands)
Not designated as hedges:
Commodity derivatives	Current assets held for sale	$	8,633	$	11,322	$	18,335
	Noncurrent assets held for sale	—		259		—
Total asset derivatives		$	8,633	$	11,581	$	18,335

Liability Derivatives	Location on Consolidated Balance Sheets	Fair Value at September 30, 2015		Fair Value at September 30, 2014		Fair Value at December 31, 2014
		(In thousands)
Not designated as hedges:
Commodity derivatives	Current liabilities held for sale	$	—	$	44	$	—
Total liability derivatives		$	—	$	44	$	—

Offsetting assets and liabilities master netting

The gross derivative assets and liabilities (excluding settlement receivables and payables that may be subject to the same master netting agreements) presented on the Consolidated Balance Sheets and the amount eligible for offset under the master netting agreements is presented in the following table:

September 30, 2015	Gross Amounts Recognized on the Consolidated Balance Sheets		Gross Amounts Not Offset on the Consolidated Balance Sheets		Net
	(In thousands)
Assets:
Commodity derivatives	$	8,633	$	—	$	8,633
Total assets	$	8,633	$	—	$	8,633

September 30, 2014	Gross Amounts Recognized on the Consolidated Balance Sheets		Gross Amounts Not Offset on the Consolidated Balance Sheets			Net
	(In thousands)
Assets:
Commodity derivatives	$	11,581	$	(44	)	$	11,537
Total assets	$	11,581	$	(44	)	$	11,537
Liabilities:
Commodity derivatives	$	44	$	(44	)	$	—
Total liabilities	$	44	$	(44	)	$	—

December 31, 2014	Gross Amounts Recognized on the Consolidated Balance Sheets		Gross Amounts Not Offset on the Consolidated Balance Sheets		Net
	(In thousands)
Assets:
Commodity derivatives	$	18,335	$	—	$	18,335
Total assets	$	18,335	$	—	$	18,335