Consolidated Statements Of Cash Flows (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Cash flows from operating activities:
Net income, including noncontrolling interests	$ 2,392	$ 66,516
Adjustments to reconcile net income (loss), including noncontrolling interests to net cash provided by operating activities
Less: Income from discontinued operations, net of tax	(1,058)	(48,853)
Depreciation and amortization	24,380	24,649
Amortization of deferred financing costs	1,472	1,611
Stock-based compensation expense	3,353	1,838
Amortization of debt discount	1,278	2,355
Deferred income taxes	16,784	(2,673)
Excess tax from stock-based compensation	(617)	340
Loss on early extinguishment of debt	2,882	17,127
Unrealized gain and ineffectiveness on derivative contracts, net	969	114
Changes in operating assets and liabilities:
Accounts receivable, net	3,714	6,835
Other current assets	12,577	10,483
Income tax payable	(20,283)	23,233
Accounts payable and accrued liabilities	(48,765)	(35,987)
Oil and gas asset retirement costs	(240)	(5,367)
Other noncurrent, net	(7,005)	(4,056)
Net cash provided by (used in) operating activities	(8,167)	58,165
Net cash provided (used in) by discontinued operations	(30,503)	75,640
Net cash provided by (used in) operating activities	(38,670)	133,805
Cash flows from investing activities:
Capital expenditures	(36,455)	(82,962)
Distributions from equity investments, net	2,050	5,943
Net cash provided by (used in) investing activities	(34,405)	(77,019)
Net cash used in discontinued operations	582,965	(17,860)
Net cash provided by (used in) investing activities	548,560	(94,879)
Cash flows from financing activities:
Early extinguishment of Senior Unsecured Notes		(209,500)
Borrowing under revolving credit facility	2,573	100,000
Repayment of revolving credit facility	(24,473)
Issuance of Convertible Senior Notes due 2032		200,000
Repurchase of Convertible Senior Notes due 2025	(3,487)	(143,945)
Proceeds from Term Loan A		100,000
Repayment of Term Loan	(294,882)	(750)
Repayment of MARAD borrowings	(2,529)	(2,409)
Deferred financing costs	(41)	(6,337)
Distributions to noncontrolling interest	(1,037)
Repurchases of common stock	(1,473)	(991)
Excess tax from stock-based compensation	617	(340)
Exercise of stock options, net and other	174	381
Net cash provided by (used in) financing activities	(324,558)	36,109
Effect of exchange rate changes on cash and cash equivalents	3,218	(1,051)
Net increase in cash and cash equivalents	188,550	73,984
Cash and cash equivalents:
Balance, beginning of year	437,100	546,465
Balance, end of period	$ 625,650	$ 620,449