CONSOLIDATED STATEMENT OF CASH FLOWS (USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
CASH FLOWS FROM OPERATING ACTIVITIES
Net income	$ 104,468	$ 279,773	$ 131,730
Adjustments to reconcile net income to cash provided by operating activities:
Depreciation, depletion and amortization	632,760	651,052	451,405
Impairment of oil and gas properties	771,037us-gaap_ImpairmentOfOilAndGasProperties	0us-gaap_ImpairmentOfOilAndGasProperties	0us-gaap_ImpairmentOfOilAndGasProperties
Deferred income tax (benefit) expense	(112,567)us-gaap_DeferredIncomeTaxExpenseBenefit	138,380us-gaap_DeferredIncomeTaxExpenseBenefit	80,929us-gaap_DeferredIncomeTaxExpenseBenefit
(Gain) loss on sale of assets	(17,120)	(21,351)	(50,635)
Exploration expense	7,907us-gaap_ResultsOfOperationsDryHoleCosts	808us-gaap_ResultsOfOperationsDryHoleCosts	14,000us-gaap_ResultsOfOperationsDryHoleCosts
Unrealized (gain) loss on derivative instruments	(137,603)us-gaap_UnrealizedGainLossOnDerivatives	0us-gaap_UnrealizedGainLossOnDerivatives	494us-gaap_UnrealizedGainLossOnDerivatives
Amortization of debt issuance costs	4,754us-gaap_AmortizationOfFinancingCosts	3,693us-gaap_AmortizationOfFinancingCosts	5,265us-gaap_AmortizationOfFinancingCosts
Stock-based compensation, pension and other	18,349	45,863	46,872
Changes in assets and liabilities:
Accounts receivable, net	(11,689)us-gaap_IncreaseDecreaseInReceivables	(49,398)us-gaap_IncreaseDecreaseInReceivables	(58,037)us-gaap_IncreaseDecreaseInReceivables
Income taxes	(34,282)	29,002	3,055
Inventories	3,441us-gaap_IncreaseDecreaseInInventories	(3,033)us-gaap_IncreaseDecreaseInInventories	7,104us-gaap_IncreaseDecreaseInInventories
Other current assets	733	(428)	(1,198)
Accounts payable and accrued liabilities	2,883	(22,908)	18,843
Other assets and liabilities	1,989	(8,014)	2,266
Stock-based compensation tax benefit	1,375	(18,913)	0
Net cash provided by operating activities	1,236,435	1,024,526	652,093
CASH FLOWS FROM INVESTING ACTIVITIES
Capital expenditures	(1,479,632)	(1,194,739)	(927,977)
Acquisitions	(214,737)	0	0
Proceeds from sale of assets	39,491	323,501	169,326
Restricted cash	28,094	(28,094)	0
Investment in equity method investments	(38,056)	(18,875)	(6,863)
Net cash used in investing activities	(1,664,840)	(918,207)	(765,514)
CASH FLOWS FROM FINANCING ACTIVITIES
Borrowings from debt	2,032,000	955,000	400,000
Repayments of debt	(1,427,000)us-gaap_RepaymentsOfLongTermDebt	(895,000)us-gaap_RepaymentsOfLongTermDebt	(263,000)us-gaap_RepaymentsOfLongTermDebt
Treasury stock repurchases	(138,852)us-gaap_PaymentsForRepurchaseOfEquity	(164,634)us-gaap_PaymentsForRepurchaseOfEquity	0us-gaap_PaymentsForRepurchaseOfEquity
Dividends paid	(33,278)us-gaap_PaymentsOfDividendsCommonStock	(25,232)us-gaap_PaymentsOfDividendsCommonStock	(16,757)us-gaap_PaymentsOfDividendsCommonStock
Stock-based compensation tax benefit	(1,375)	18,913	0
Capitalized debt issuance costs	(5,626)us-gaap_PaymentsOfDebtIssuanceCosts	(2,750)us-gaap_PaymentsOfDebtIssuanceCosts	(5,005)us-gaap_PaymentsOfDebtIssuanceCosts
Other	90	48	(992)
Net cash provided by (used in) financing activities	425,959	(113,655)	114,246
Net (decrease) increase in cash and cash equivalents	(2,446)	(7,336)	825
Cash and cash equivalents, beginning of period	23,400	30,736	29,911
Cash and cash equivalents, end of period	$ 20,954	$ 23,400	$ 30,736

The aggregate amount of noncash, equity-based employee remuneration and non-cash pension expense. This may include the value of stock options, amortization of restricted stock, and adjustments for officers compensation, as well as other non-cash expenses. As noncash, this element is an add back when calculating net cash generated by operating activities using the indirect method.

No definition available.