Income Taxes (Tables)

12 Months Ended

Dec. 31, 2014

Income Taxes [Abstract]

Schedule Of Components Of Income Tax Expense (Benefit)

(Amounts in thousands)	U.K.		U.S.		Other		Total
Year Ended December 31, 2014:
Net loss before taxes	$	(741,005)	$	(137,440)	$	(16,499)	$	(894,944)
PRT tax current expense		9,172		—		—		9,172
PRT tax deferred benefit		(4,272)		—		—		(4,272)
PRT tax expense		4,900		—		—		4,900
Corporate current expense (benefit)		(127)		—		21		(106)
Corporate deferred benefit		(59,483)		—		—		(59,483)
Corporate tax expense (benefit)		(59,610)		—		21		(59,589)
Total tax expense (benefit)		(54,710)		—		21		(54,689)
Net loss after taxes	$	(686,295)	$	(137,440)	$	(16,520)	$	(840,255)
Year Ended December 31, 2013:
Net loss before taxes	$	(35,273)	$	(44,591)	$	(9,173)	$	(89,037)
PRT tax current expense		20,667		—		—		20,667
PRT tax deferred benefit		(13,978)		—		—		(13,978)
PRT tax expense		6,689		—		—		6,689
Corporate current expense		—		—		30		30
Corporate deferred benefit		(277)		—		—		(277)
Corporate tax expense (benefit)		(277)		—		30		(247)
Total tax expense		6,412		—		30		6,442
Net loss after taxes	$	(41,685)	$	(44,591)	$	(9,203)	$	(95,479)
Year Ended December 31, 2012:
Net income (loss) before taxes	$	(22,959)	$	(91,383)	$	2,344	$	(111,998)
PRT tax current expense		31,796		—		—		31,796
PRT tax deferred benefit		(14,823)		—		—		(14,823)
PRT tax expense		16,973		—		—		16,973
Corporate current expense		—		—		26		26
Corporate deferred benefit		(11,358)		—		—		(11,358)
Deferred tax expense related to U.K. tax law change		8,587		—		—		8,587
Corporate tax expense (benefit)		(2,771)		—		26		(2,745)
Total tax expense		14,202		—		26		14,228
Net income (loss) after taxes	$	(37,161)	$	(91,383)	$	2,318	$	(126,226)

Schedule Of Effective Income Tax Rate Reconciliation

	Year Ended December 31,
	2014		2013		2012
Federal income tax benefit at statutory rate	$	(313,230)	$	(31,163)	$	(39,199)
Taxation of foreign operations		(65,478)		21,998		5,859
Effect of out-of-period adjustment		—		—		6,997
Change in valuation allowance		232,513		15,343		30,329
U.K. tax increase from tax law and rate changes		—		—		8,587
Goodwill impairment		90,733		—		—
Disallowed executive compensation		88		247		1,655
Other		685		17		—
Total Income Tax Expense (Benefit)	$	(54,689)	$	6,442	$	14,228
Effective Income Tax Rate		6%		-7%		-13%

Schedule Of Deferred Tax Assets And Liabilities

	2014		2013
Net deferred tax asset:
Deferred compensation	$	1,861	$	2,401
Asset retirement obligation		53,140		84,941
Net operating loss and capital loss carryforward		422,828		423,374
Unrealized loss on embedded derivative instruments		—		1,265
Property, plant and equipment		19,633		14,086
Inventory / other		769		2,185
Total deferred tax assets		498,231		528,252
Less valuation allowance		(335,251)		(103,171)
Total deferred tax assets after valuation allowance		162,980		425,081
Deferred tax liability:
Property, plant and equipment		(192,847)		(526,274)
Petroleum revenue tax, net of tax benefit		(16,100)		(17,967)
Debt discount		—		(471)
Total deferred tax liabilities		(208,947)		(544,712)
Net deferred tax liability	$	(45,967)	$	(119,631)

Schedule Of Tax Attributes Available To Reduce Future Income Taxes

		As of December 31,
		2014			2013
	Types of Tax Attributes	Years of Expiration	Carry-forward Amount		Years of Expiration	Carry-forward Amount
U.K.
Corporate tax	NOL	Indefinite	$	610,743	Indefinite	$	638,466
Supplemental Corporate tax	NOL	Indefinite		346,828	Indefinite		455,318
U.S.
Corporate Income tax	NOL	2023 - 2034		354,171	2023 - 2033		232,745
State Income tax	NOL	2015 - 2034		84,069	2014 - 2033		83,613
Capital gains tax	Capital loss	2015		1,848	2015		1,848

Schedule Of Change In Unrecognized Tax Benefits

		December 31,
		2014		2013
Balance at the beginning of the year	$	6,820	$	6,820
Decrease in unrecognized tax benefits from lapse in statute of limitations		(6,820)		—
Balance at the end of the year	$	—	$	6,820

Schedule Of Tax Years Subject To Examination

Tax Jurisdiction
U.K.	2013 - 2014
All others	2012 - 2014