Suspended Well Costs (Tables)

3 Months Ended

Mar. 31, 2015

Suspended Well Costs

Schedule of capitalized exploratory well costs

	Three Months Ended March 31, 2015
	(In thousands)
Beginning balance	$	226,714
Additions to capitalized exploratory well costs pending the determination of proved reserves	24,168
Reclassification due to determination of proved reserves	—
Capitalized exploratory well costs charged to expense	(23,375		)
Ending balance	$	227,507

Schedule of aging of capitalized exploratory well costs and number of projects for which exploratory well costs were capitalized for more than one year

	March 31, 2015		December 31, 2014
	(In thousands, except well counts)
Exploratory well costs capitalized for a period of one year or less	$	13,723	$	16,814
Exploratory well costs capitalized for a period of one to two years	44,655		40,865
Exploratory well costs capitalized for a period of three to six years	169,129		169,035
Ending balance	$	227,507	$	226,714
Number of projects that have exploratory well costs that have been capitalized for a period greater than one year	4		5