Condensed Consolidated Statements of Cash Flows (USD $) In Thousands	6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010
Cash flows from operating activities:
Net income (loss), including noncontrolling interests	$ 68,744	$ (102,075)
Adjustments to reconcile net income (loss), including noncontrolling interests to net cash provided by operating activities
Depreciation and amortization	167,170	146,268
Asset impairment charge and dry hole expense	29,352	170,784
Amortization of deferred financing costs	4,777	3,768
Stock compensation expense	4,938	4,589
Amortization of debt discount	4,414	4,136
Deferred income taxes	23,864	(54,749)
Excess tax benefit from stock-based compensation	1,196	2,163
Gain on investment in Cal Dive common stock	(753)	0
(Gain) loss on sale or acquisition of assets	6	(6,233)
Unrealized (gain) loss on derivative contracts	(34)	2,813
Changes in operating assets and liabilities:
Accounts receivable, net	(18,207)	(30,591)
Other current assets	12,712	16,477
Income tax payable	(4,154)	(10,811)
Accounts payable and accrued liabilities	(27,070)	28,027
Oil and gas asset retirement costs	(16,073)	(28,727)
Other noncurrent, net	(309)	(9,439)
Net cash provided by operating activities	250,573	136,400
Cash flows from investing activities:
Capital expenditures	(106,122)	(135,612)
Investments in equity investments	(2,699)	(6,307)
Distributions from equity investments, net	1,593	8,132
Proceeds from sale of Cal Dive common stock	3,588	0
Insurance recovery for capital items	0	16,106
Decrease in restricted cash	863	109
Net cash used in investing activities	(102,777)	(117,572)
Cash flows from financing activities:
Borrowing under revolving credit facility	109,400	0
Repayment of revolving credit facility	(109,400)	0
Repayment of Helix Term Loan	(111,191)	(2,163)
Repayment of MARAD borrowings	(2,294)	(2,403)
Loan notes repayment	(1,213)	(1,167)
Deferred financing costs	(9,014)	(2,792)
Preferred stock dividends paid	(20)	(94)
Repurchases of common stock	(1,012)	(9,127)
Excess tax benefit from stock-based compensation	(1,196)	(2,163)
Exercise of stock options, net	1,672	163
Net cash used in financing activities	(124,268)	(19,746)
Effect of exchange rate changes on cash and cash equivalents	(424)	246
Net increase (decrease) in cash and cash equivalents	23,104	(672)
Cash and cash equivalents:
Balance, beginning of year	391,085	270,673
Balance, end of period	$ 414,189	$ 270,001