Summary Of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2011

Summary Of Significant Accounting Policies [Abstract]

Supplemental Cash Flow Information

		Year Ended December 31,
		2011		2010		2009
Interest paid, net of interest capitalized	$	81,000	$	68,534	$	48,313
Income taxes paid	$	11,216	$	10,071	$	106,480

Summary Of Gross Components Of Property And Equipment

	Estimated Useful Life		2011		2010
ROVs/Vessels	10to 30 years	$	1,616,772	$	1,573,471
Oil and gas leases and related equipment	Units-of-Production		2,574,693		2,747,895
Machinery, equipment, buildings and leasehold improvements	5to 30 years		199,599		164,711
Total property and equipment		$	4,391,064	$	4,486,077

Summary Of Changes In The Carrying Amount Of Goodwill

	Contracting Services
Balance at December 31, 2009 (1)	$	78,643
Impairments (2)		(16,743	)
Other adjustments(3)		594
Balance at December 31, 2010		62,494
Impairments		—
Other adjustments(3)		(279	)
Balance at December 31, 2011	$	62,215

(1)   Prior to 2009, we fully impaired our oil and gas related goodwill ($704.3 million) as well as the $8.3 million of goodwill associated with our former reservoir consulting business.

(2)   Amount reflects full write off of goodwill associated with our WOSEA operations.

(3)   Reflects foreign currency adjustment for certain amounts of our goodwill.

Schedule Of Changes In Asset Retirement Obligations

		2011			2010
Asset retirement obligations at January 1,	$	234,936		$	248,128
Liability incurred during the period		4,982			18,056
Liability settled during the period		(42,675	)		(55,114	)
Other revisions in estimated cash flows		42,268	(1)		8,349
Accretion expense (included in depreciation and amortization)		14,880			15,517
Asset retirement obligations at December 31,	$	254,391		$	234,936

(1)   Includes impairment charges totaling $41.7 million, including $20.0 million associated with our only United Kingdom oil and gas property, to increase the estimated asset retirement obligation related to properties that are no longer producing oil or natural gas.

Summary Of Volumes Under Derivatives And Forward Sales Contracts

Production Period	Instrument Type	Average Monthly Volumes	Weighted Average Price a
Crude Oil:			(per barrel)
January 2012 — December 2012	Collar	75.0 MBbl	$  96.67 — $118.57b
January 2012 — December 2012	Collar	139.0 MBbl	$  99.42 — $117.59
January 2012 — December 2012	Swap	16.0 MBbl	$103.20
January 2013 — December 2013	Swap	41.7 MBbl	$99.15
January 2013 — December 2013	Collar	41.7 MBbl	$  95.00 — $102.60
Natural Gas:			(per Mcf)
January 2012 — December 2012	Swaps	750.0 Mmcf	$4.35
January 2012 — December 2012	Collar	166.7 Mmcf	$4.75 —  $5.09
January 2013 — December 2013	Swaps	500.0 Mmcf	$4.09

a.   The prices quoted in the table above are NYMEX Henry Hub for natural gas.  For oil most of the contracts are priced as Brent crude oil.

b.   This contract is priced using NYMEX West Texas Intermediate for crude oil.

Computations Of Basic And Diluted EPS

		Year Ended December 31,
		2011				2010				2009
		Income		Shares		Income		Shares		Income		Shares
Basic:
Net income (loss) applicable to common shareholders	$	129,939			$	(127,102	)		$	101,867
Less: Undistributed net income allocable to participating securities		(1,599	)			—				(1,436	)
Undistributed net income (loss) applicable to common shareholders		128,340				(127,102	)			100,431
(Income) loss from discontinued operations		—				—				(9,581	)
Add: Undiscounted net income from discontinued operations allocable to participating securities		—				—				135
Income (loss) per common share – continuing operations	$	128,340		104,528	$	(127,102	)	103,857	$	90,985		99,136

		Year Ended December 31,
		2011			2010				2009
		Income	Shares		Income		Shares		Income	Shares
Diluted:
Net  income (loss) per common share – continuing operations – Basic	$	128,340	104,528	$	(127,102	)	103,857	$	90,985	99,136
Effect of dilutive securities:
Stock options		—	64		—		—		—	28
Undistributed earnings reallocated to participating securities		7	—		—		—		80	—
Convertible Senior Notes		—	—		—		—		—	—
Convertible preferred stock		40	361		—		—		748	6,556
Income (loss) per common share — continuing operations		128,387			(127,102	)			91,813
Income (loss) per common share — discontinued operations		—			—				9,581
Net income (loss) per common share	$	128,387	104,953	$	(127,102	)	103,857	$	101,394	105,720

 

Summary Of Shares Included In Diluted Per Share Calculations

	2010
Diluted shares (as reported)		103,857
Stock options		54
Convertible preferred stock		1,015
Total		104,926

Assets And Liabilities Measured At Fair Value On A Recurring Basis

		Level 1		Level 2 (1)		Level 3		Total	Valuation Technique
Assets:
Oil and gas swaps and collars	$	–	$	22,381	$	–	$	22,381	(c)
Interest rate swaps		–		327		–		327	(c)
Foreign currency forwards		–		55		–		55	(c)
Liabilities:
Oil and gas swaps and collars		–		2,597		–		2,597	(c)
Interest rate swaps		–		202		–		202	(c)
Foreign currency forwards		–		159		–		159	(c)
Fair value of long term debt (2)		1,081,376		124,488		–		1,205,864	(a)
Total net liability	$	1,081,376	$	104,683	$	–	$	1,186,059

(1)   Unless otherwise indicated, the fair value of our Level 2 derivative instruments reflects our best estimate and is based upon exchange or over-the-counter quotations whenever they are available. Where quotes are not available, we utilize other valuation techniques or models to estimate market values. These modeling techniques require us to use published future market prices and estimate market volatility and liquidity based on market data. Our actual results may differ from our estimates, and these differences can be positive or negative.

(2)   See Note 9 for additional information regarding our long term debt.   

Fair Value Of Long Term Debt

	2011				2010
	Carrying Value		Fair Value		Carrying Value		Fair Value
Term Loan(1)	$	279,750	$	279,750	$	410,441	$	406,337
Revolving Credit Facility	—		—		—		—
Convertible Senior Notes(1) (2)		300,000		300,543		300,000		289,158
Senior Unsecured Notes(1)		474,960		501,083		550,000		567,875
MARAD Debt(3)		110,166		124,488		114,811		122,159
Loan Notes	—		—			1,208		1,208
Total	$	1,164,876	$	1,205,864	$	1,376,460	$	1,386,737

(1)	The fair values of these instruments were based on quoted market prices as of December 31, 2011 and 2010.  The fair values were estimated using level 1 inputs using the market approach.
(2)	Carrying amounts exclude the $9.6 million and $18.5 million of unamortized discount on the Convertible Senior Notes at December 31, 2011 and 2010, respectively.
(3)	The fair value of the MARAD debt was determined by a third-party evaluation of the remaining average life and outstanding principal balance of the MARAD indebtedness as compared to other government guaranteed obligations in the market place with similar terms.  The fair value of the MARAD debt was estimated using Level 2 fair value inputs using the market approach.