Disclosures About Oil and Gas Producing Activities (Unaudited) (Tables)

12 Months Ended

Dec. 31, 2014

Oil And Gas Exploration And Production Industries Disclosures [Abstract]

Analyses of changes in proven reserves

	United States
	Oil	Natural Gas	NGLs
	(MBbls)	(MMcf)	(MBbls)
Reserves, December 31, 2011	33,081	4,778,554	-
Extensions, discoveries and additions	5,435	819,896	-
Production	(1,282)	(249,310)	-
Revisions	(19,097)	(2,382,695)	-
Reserves, December 31, 2012	18,137	2,966,445	-
Extensions, discoveries and additions	11,329	1,409,528	-
Acquistions	10,114	-	-
Production	(1,196)	(224,912)	-
Revisions	(4,265)	(741,319)	-
Reserves, December 31, 2013	34,119	3,409,742	-
Extensions, discoveries and additions	34,275	866,513	210
Sales	-	(239,290)	-
Acquistions	9,381	1,345,964	21,740
Production	(3,409)	(228,517)	-
Revisions	(6,600)	(323,218)	43
Reserves, December 31, 2014	67,766	4,831,194	21,993
	United States
	Oil	Natural Gas	NGLs
	(MBbls)	(MMcf)	(MBbls)
Proved:
Developed	11,794	1,973,391	-
Undeveloped	21,287	2,805,163	-
Total Proved - 2011	33,081	4,778,554	-
Developed	10,531	1,820,994	-
Undeveloped	7,606	1,145,451	-
Total Proved - 2012	18,137	2,966,445	-
Developed	20,566	1,777,267	-
Undeveloped	13,553	1,632,475	-
Total Proved - 2013	34,119	3,409,742	-
Developed	28,481	2,245,004	9,118
Undeveloped	39,285	2,586,190	12,875
Total Proved - 2014	67,766	4,831,194	21,993

Standardized measure

		As of December 31,
		2014		2013		2012
Future cash inflows	$	27,331,391	$	14,861,131	$	9,380,970
Future production costs		(8,627,657)		(4,540,209)		(3,217,771)
Future development costs		(3,859,385)		(2,014,751)		(1,661,394)
Future income taxes		(3,898,355)		(1,897,340)		(733,855)
Future net cash flows		10,945,994		6,408,831		3,767,950
Discount at 10%		(5,712,511)		(3,220,862)		(1,873,633)
Standardized measure of discounted
future net cash flows	$	5,233,483	$	3,187,969	$	1,894,317

Summary of changes in the standardized measure of discounted future net cash flows

		December 31,
		2014		2013		2012
Standardized measure, beginning	$	3,187,969	$	1,894,317	$	3,796,056
Net revisions of previous quantity estimates		(603,795)		(1,089,316)		(2,516,159)
Extensions, discoveries and other changes		1,787,643		2,098,644		858,951
Sales of reserves in place		(398,506)		-		-
Acquisition of reserves		2,552,491		86,196		-
Changes in future development costs		(1,013,652)		(252,992)		952,067
Sales of oil and gas, net of production costs		(949,389)		(720,826)		(625,745)
Net change in prices and production costs		1,010,052		1,204,041		(2,912,698)
Development costs incurred during the
period that reduce future development costs		342,987		171,149		316,394
Accretion of discount		413,177		226,326		529,696
Net changes in production rates and other		(175,419)		145,289		363,788
Net change in income taxes		(920,075)		(574,859)		1,131,967
Aggregate changes		2,045,514		1,293,652		(1,901,739)
Standardized measure, ending	$	5,233,483	$	3,187,969	$	1,894,317

Costs incurred in oil and gas exploration and development activities

		Years Ended December 31,
		2014		2013		2012
United States
Property Acquisitions:
Unproved	$	26,106	$	424,540	$	47,979
Proved		895,179		224,410		-
Exploration*		197,664		184,007		199,569
Development		382,984		186,755		587,618
Total	$	1,501,933	$	1,019,712	$	835,166
* Exploration costs (as defined in Regulation S-X) includes costs spent on development of unproved reserves in the Pinedale Field.

Results of operations for oil and gas producing activities

F. RESULTS OF OPERATIONS FOR OIL AND GAS PRODUCING ACTIVITIES:
			Years Ended December 31,
			2014		2013		2012
	United States
	Oil and gas revenue	$	1,230,020	$	933,404	$	809,974
	Production expenses		(280,631)		(212,578)		(184,229)
	Depletion and depreciation		(292,951)		(243,390)		(388,985)
	Ceiling test and other impairments		-		-		(2,972,464)
	Income tax benefit (expense)		3,736		(2,821)		662,698
	Total	$	660,174	$	474,615	$	(2,073,006)

Capitalized Costs Relating to Oil and Gas Producing Activities

		December 31,		December 31,
		2014		2013
Proven Properties:
Acquisition, equipment, exploration, drilling and environmental costs(2), (3)	$	9,731,407	$	7,817,374
Less: Accumulated depletion, depreciation and amortization		(6,094,764)		(5,808,836)
		3,636,643		2,008,538
Unproven Properties:
Acquisition and exploration costs not being amortized (1), (2)		242,294		413,073
Net capitalized costs - oil and gas properties	$	3,878,937	$	2,421,611

G. CAPITALIZED COSTS RELATING TO OIL AND GAS PRODUCING ACTIVITIES:
			December 31,
			2014		2013
	Proven Properties:
	Acquisition, equipment, exploration, drilling and
	environmental costs	$	9,731,407	$	7,817,374
	Less: accumulated depletion, depreciation and amortization		(6,094,764)		(5,808,836)
			3,636,643		2,008,538
	Unproven Properties:
	Acquisition and exploration costs not being amortized		242,294		413,073
		$	3,878,937	$	2,421,611