Suspended Exploratory Well Costs (Tables)

9 Months Ended

Sep. 30, 2014

Extractive Industries [Abstract]

Suspended Exploratory Well Costs

The following table reflects the changes in capitalized exploratory well costs for the nine months ended September 30, 2014 and the year ended December 31, 2013 (in thousands except for number of projects):

	September 30, 2014			December 31, 2013
Balance at beginning of period	$	6,964		$	57,360
Additions to capitalized exploratory well costs pending the determination of proved reserves		90,767			39,832
Reclassifications to wells, facilities and equipment based on determination of proved reserves		(15,735	)		(84,840	)
Capitalized exploratory well costs charged to expense		—			—
Divested wells		—			(5,388	)
Balance at end of period		81,996			6,964
Less exploratory well costs that have been capitalized for a period of one year or less		(46,412	)		—
Capitalized exploratory well costs that have been capitalized for a period greater than one year	$	35,584		$	6,964
Number of projects that have exploratory well costs that have been capitalized for a period greater than one year		5			1

Aging of Capitalized Exploratory Well Costs Suspended More Than One Year

The following table provides an aging of capitalized exploratory well costs that have been suspended for more than one year as of September 30, 2014 (in thousands):

	Total		2014		2013		2012		2011
Capitalized exploratory well costs that have been capitalized for more than one year	$	35,584	$	24,484	$	4,246	$	6,801	$	53