Derivatives And Fair Value Measurements (Tables)

6 Months Ended

Jun. 30, 2014

Credit Risk Derivatives, at Fair Value, Net [Abstract]

Estimated Fair Value Of Derivative Instruments Under Input Levels

	Asset Derivatives				Liability Derivatives
	June 30, 2014		December 31, 2013		June 30, 2014		December 31, 2013
	(in thousands)				(in thousands)
Level 2 derivative instruments	$	74,307	$	107,395	$	5,969	$	3,448
Level 3 derivative instruments	2,184		23,485		7,717		—
Total	$	76,491	$	130,880	$	13,686	$	3,448

Changes In Level 3 Fair Values

	For the Three Months Ended June 30,
	2014			2013
	(In thousands)
Balance at beginning of period	$	7,201		$	(9,037	)
Total gains (losses) for the period:
Unrealized gain (loss) on derivatives	(13,434		)	556
Settlements in net derivative gains (losses)	700			(1,392		)
Balance at end of period	$	(5,533	)	$	(9,873	)
Total gains (losses) included in net derivative gains (losses) attributable to the change in unrealized gains (losses) related to assets still held at the reporting date	$	(11,385	)	$	2,854

	For the Six Months Ended June 30,
	2014			2013
	(In thousands)
Balance at beginning of period	$	23,485		$	(4,931	)
Total gains (losses) for the period:
Unrealized gain (loss) on derivatives	(31,317		)	538
Settlements in net derivative gains (losses)	2,299			(5,480		)
Balance at end of period	$	(5,533	)	$	(9,873	)
Total gains (losses) included in net derivative gains (losses) attributable to the change in unrealized gains (losses) related to assets still held at the reporting date	$	(26,961	)	$	2,762

Marketable Securities

	June 30, 2014
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Fair Value (net carrying amount)
	(In thousands)
Marketable securities (available-for-sale)
Commercial paper	9,987		—		—		9,987
Marketable securities	$	9,987	$	—	$	—	$	9,987

	December 31, 2013
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Market Value
	(In thousands)
Marketable securities (held-to-maturity)
Time deposits	$	29,419	$	—	$	(22	)	$	29,397
Commercial paper	136,924		27		(25		)	136,926
Marketable securities	$	166,343	$	27	$	(47	)	$	166,323

Price Collars And Swaps For Anticipated Natural Gas And NGL Production

Production Year	Daily Production Volume
	Natural Gas	NGL	Natural Gas Basis Swaps
	MMcfd	MBbld	MMcfd
Remaining 2014 (1)	170	4	40
2015	150	—	—
2016-2021	40	—	—

⁽¹⁾  Our 2014 NGL derivatives end in September. Our natural gas derivatives and AECO to NYMEX natural gas basis swaps are in place for the whole of 2014.

Estimated Fair Value Of Derivative Instruments

	Asset Derivatives				Liability Derivatives
	June 30, 2014		December 31, 2013		June 30, 2014		December 31, 2013
	(In thousands)				(In thousands)
Derivatives not designated as hedges:
Commodity contracts reported in:
Current derivative assets	$	51,361	$	60,063	$	2,907	$	2,540
Noncurrent derivative assets	69,847		105,315		41,810		31,958
Current derivative liabilities	—		—		5,965		3,125
Noncurrent derivative liabilities	25		—		7,746		323
Total derivatives not designated as hedges	$	121,233	$	165,378	$	58,428	$	37,946