Consolidated Statements Of Cash Flows (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Cash flows from operating activities:
Net income, including noncontrolling interests	$ 54,222	$ 2,392
Adjustments to reconcile net income, including noncontrolling interests to net cash provided by (used in) operating activities:
Income from discontinued operations		(1,058)
Depreciation and amortization	24,726	24,380
Amortization of deferred financing costs	1,218	1,472
Stock-based compensation expense	1,811	3,353
Amortization of debt discount	1,397	1,278
Deferred income taxes	33,407	16,784
Excess tax from stock-based compensation	(619)	(617)
Gain on sale of assets	(11,496)
Loss on early extinguishment of debt		2,882
Unrealized loss and ineffectiveness on derivative contracts, net	68	969
Changes in operating assets and liabilities:
Accounts receivable, net	(5,527)	3,714
Other current assets	(7,122)	12,577
Income tax payable	(26,106)	(20,283)
Accounts payable and accrued liabilities	(14,093)	(48,765)
Oil and gas asset retirement costs	(292)	(240)
Other noncurrent, net	(2,757)	(7,005)
Net cash provided by (used in) operating activities	48,837	(8,167)
Net cash used in discontinued operations		(30,503)
Net cash provided by (used in) operating activities	48,837	(38,670)
Cash flows from investing activities:
Capital expenditures	(37,991)	(36,455)
Distributions from equity investments, net	2,092	2,050
Proceeds from sale of assets	11,074
Acquisition of noncontrolling interests	20,085
Net cash used in investing activities	(44,910)	(34,405)
Net cash provided by discontinued operations		582,965
Net cash provided by (used in) investing activities	(44,910)	548,560
Cash flows from financing activities:
Borrowings under revolving credit facility		2,573
Repayment of revolving credit facility		(24,473)
Repurchase of Convertible Senior Notes due 2025		(3,487)
Repayment of term loans	(3,750)	(294,882)
Repayment of MARAD borrowings	(2,655)	(2,529)
Deferred financing costs		(41)
Distributions to noncontrolling interest	(1,018)	(1,037)
Repurchases of common stock	(5,449)	(1,473)
Excess tax from stock-based compensation	619	617
Exercise of stock options, net and other		174
Proceeds from issuance of ESPP shares	942
Net cash used in financing activities	(11,311)	(324,558)
Effect of exchange rate changes on cash and cash equivalents	(737)	3,218
Net increase (decrease) in cash and cash equivalents	(8,121)	188,550
Cash and cash equivalents:
Balance, beginning of year	478,200	437,100
Balance, end of period	$ 470,079	$ 625,650