Consolidated Statements Of Cash Flows (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013
Cash flows from operating activities:
Net income, including noncontrolling interests	$ 112,004	$ 30,392
Adjustments to reconcile net income, including noncontrolling interests, to net cash provided by (used in) operating activities:
Income from discontinued operations		(1,029)
Depreciation and amortization	52,853	49,692
Amortization of deferred financing costs	2,435	2,824
Stock-based compensation expense	3,755	5,473
Amortization of debt discount	2,765	2,557
Deferred income taxes	27,669	16,058
Excess tax from stock-based compensation	(382)	(383)
(Gain) loss on disposition of assets, net	(10,418)	1,085
Loss on early extinguishment of debt		3,528
Unrealized loss and ineffectiveness on derivative contracts, net	69	638
Changes in operating assets and liabilities:
Accounts receivable, net	(40,687)	(19,702)
Other current assets	(1,998)	15,479
Income tax payable, net of income tax receivable	(24,376)	(56,454)
Accounts payable and accrued liabilities	15,169	(35,081)
Oil and gas asset retirement costs	(857)	(5,950)
Other noncurrent, net	1,504	(7,117)
Net cash provided by operating activities	139,505	2,010
Net cash used in discontinued operations		(30,503)
Net cash provided by (used in) operating activities	139,505	(28,493)
Cash flows from investing activities:
Capital expenditures	(93,001)	(102,383)
Distributions from equity investments, net	4,849	4,567
Proceeds from sale of assets	11,074	108,250
Acquisition of noncontrolling interests	20,085
Net cash provided by (used in) investing activities	(97,163)	10,434
Net cash provided by discontinued operations		582,965
Net cash provided by (used in) investing activities	(97,163)	593,399
Cash flows from financing activities:
Borrowings under revolving credit facility		47,617
Repayment of revolving credit facility		(147,617)
Repurchase of Convertible Senior Notes due 2025		(3,487)
Repayment of term loans	(7,500)	(367,181)
Repayment of MARAD borrowings	(2,655)	(2,529)
Deferred financing costs		(10,932)
Distributions to noncontrolling interest	(1,018)	(2,033)
Repurchases of common stock	(6,653)	(5,562)
Excess tax from stock-based compensation	382	383
Exercise of stock options, net and other		(186)
Proceeds from issuance of ESPP shares	1,932
Net cash used in financing activities	(15,512)	(491,527)
Effect of exchange rate changes on cash and cash equivalents	(3,573)	3,048
Net increase in cash and cash equivalents	23,257	76,427
Cash and cash equivalents:
Balance, beginning of year	478,200	437,100
Balance, end of period	$ 501,457	$ 513,527