Derivative instruments (Tables)

12 Months Ended

Dec. 31, 2013

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Schedule of derivative instruments, gain (losses)

The gains and losses on derivative instruments for the years ended December 31 were as follows:



	2013			2012			2011
	(In thousands)
Commodity derivatives designated as cash flow hedges:
Amount of gain (loss) recognized in accumulated other comprehensive loss (effective portion), net of tax	$	(6,153	)	$	10,209		$	10,806
Amount of gain reclassified from accumulated other comprehensive loss into operating revenues (effective portion), net of tax	(4,916		)	(8,788		)	—
Amount of gain (loss) recognized in operating revenues (ineffective portion), before tax	(1,422		)	(730		)	1,827

Interest rate derivatives designated as cash flow hedges:
Amount of gain (loss) recognized in accumulated other comprehensive loss (effective portion), net of tax	559			(1,712		)	(2,906		)
Amount of loss reclassified from accumulated other comprehensive loss into interest expense (effective portion), net of tax	727			34			—
Amount of loss recognized in interest expense (ineffective portion), before tax	(769		)	—			—

Commodity derivatives not designated as hedging instruments:
Amount of gain (loss) recognized in operating revenues, before tax	(4,845		)	106			—

Derivative instruments

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



Asset Derivatives	Location on Consolidated Balance Sheets	Fair Value at December 31, 2013		Fair Value at December 31, 2012
		(In thousands)
Designated as hedges:
Commodity derivatives	Commodity derivative instruments	$	—	$	18,084
		—		18,084
Not designated as hedges:
Commodity derivatives	Commodity derivative instruments	1,447		220
	Other assets - noncurrent	503		—
		1,950		220
Total asset derivatives		$	1,950	$	18,304



Liability Derivatives	Location on Consolidated Balance Sheets	Fair Value at December 31, 2013		Fair Value at December 31, 2012
		(In thousands)
Designated as hedges:
Interest rate derivatives	Other accrued liabilities	$	—	$	6,255
		—		6,255
Not designated as hedges:
Commodity derivatives	Commodity derivative instruments	7,483		—
		7,483		—
Total liability derivatives		$	7,483	$	6,255

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:



December 31, 2013	Gross Amounts Recognized on the Consolidated Balance Sheets		Gross Amounts Not Offset on the Consolidated Balance Sheets			Net
	(In thousands)
Assets:
Commodity derivatives	$	1,950	$	(1,950	)	$	—
Total assets	$	1,950	$	(1,950	)	$	—
Liabilities:
Commodity derivatives	$	7,483	$	(1,950	)	$	5,533
Total liabilities	$	7,483	$	(1,950	)	$	5,533



December 31, 2012	Gross Amounts Recognized on the Consolidated Balance Sheets		Gross Amounts Not Offset on the Consolidated Balance Sheets		Net
	(In thousands)
Assets:
Commodity derivatives	$	18,304	$	—	$	18,304
Total assets	$	18,304	$	—	$	18,304
Liabilities:
Interest rate derivatives	$	6,255	$	—	$	6,255
Total liabilities	$	6,255	$	—	$	6,255