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v2.4.1.9

Condensed Consolidated Statement of Cash Flows (Unaudited) (USD $) In Thousands, unless otherwise specified | 3 Months Ended
--- | ---
Mar. 31, 2015 | Mar. 31, 2014
Cash flows from operating activities: |  |
Net income (loss) | $ (18,041)us-gaap_NetIncomeLoss | $ 169,953 us-gaap_NetIncomeLoss
Adjustments to reconcile net income (loss) to net cash provided by operating activities: |  |
Depreciation, depletion and amortization | 118,478 us-gaap_DepreciationDepletionAndAmortization | 91,272 us-gaap_DepreciationDepletionAndAmortization
Gain on sale of properties | 0 us-gaap_GainLossOnSaleOfProperties | (183,393)us-gaap_GainLossOnSaleOfProperties
Impairment of oil and gas properties | 5,321 us-gaap_ImpairmentOfOilAndGasProperties | 762 us-gaap_ImpairmentOfOilAndGasProperties
Deferred income taxes | (7,376)us-gaap_DeferredIncomeTaxExpenseBenefit | 98,753 us-gaap_DeferredIncomeTaxExpenseBenefit
Derivative instruments | (47,072)us-gaap_DerivativeGainLossOnDerivativeNet | 17,603 us-gaap_DerivativeGainLossOnDerivativeNet
Stock-based compensation expenses | 7,606 us-gaap_ShareBasedCompensation | 4,505 us-gaap_ShareBasedCompensation
Deferred financing costs amortization and other | 1,655 oas_DebtDiscountAmortizationAndOther | 1,487 oas_DebtDiscountAmortizationAndOther
Working capital and other changes: |  |
Change in accounts receivable | 63,313 us-gaap_IncreaseDecreaseInAccountsReceivable | (9,275)us-gaap_IncreaseDecreaseInAccountsReceivable
Change in inventory | (602)us-gaap_IncreaseDecreaseInInventories | 790 us-gaap_IncreaseDecreaseInInventories
Change in prepaid expenses | 1,892 us-gaap_IncreaseDecreaseInPrepaidExpense | (14,259)us-gaap_IncreaseDecreaseInPrepaidExpense
Change in other current assets | 5,539 us-gaap_IncreaseDecreaseInOtherCurrentAssets | (29)us-gaap_IncreaseDecreaseInOtherCurrentAssets
Change in other assets | 0 us-gaap_IncreaseDecreaseInOtherOperatingAssets | (1,593)us-gaap_IncreaseDecreaseInOtherOperatingAssets
Change in accounts payable and accrued liabilities | (42,341)us-gaap_IncreaseDecreaseInAccountsPayableAndAccruedLiabilities | 29,007 us-gaap_IncreaseDecreaseInAccountsPayableAndAccruedLiabilities
Change in other current liabilities | 0 us-gaap_IncreaseDecreaseInOtherCurrentLiabilities | 2,766 us-gaap_IncreaseDecreaseInOtherCurrentLiabilities
Change in other liabilities | (11)us-gaap_IncreaseDecreaseInOtherOperatingLiabilities | (82)us-gaap_IncreaseDecreaseInOtherOperatingLiabilities
Net cash provided by operating activities | 88,361 us-gaap_NetCashProvidedByUsedInOperatingActivities | 208,267 us-gaap_NetCashProvidedByUsedInOperatingActivities
Cash flows from investing activities: |  |
Capital expenditures | (359,113)us-gaap_PaymentsToExploreAndDevelopOilAndGasProperties | (280,895)us-gaap_PaymentsToExploreAndDevelopOilAndGasProperties
Proceeds from sale of properties | 0 us-gaap_ProceedsFromDivestitureOfBusinesses | 321,943 us-gaap_ProceedsFromDivestitureOfBusinesses
Costs related to sale of properties | 0 oas_PaymentsforCostsRelatedtoDivestitureofBusinesses | (2,010)oas_PaymentsforCostsRelatedtoDivestitureofBusinesses
Derivative settlements | 109,259 us-gaap_PaymentsForProceedsFromDerivativeInstrumentInvestingActivities | (2,239)us-gaap_PaymentsForProceedsFromDerivativeInstrumentInvestingActivities
Advances from joint interest partners | (828)oas_ProceedFromAdvanceFromJointInterestPartners | (1,898)oas_ProceedFromAdvanceFromJointInterestPartners
Net cash provided by (used in) investing activities | (250,682)us-gaap_NetCashProvidedByUsedInInvestingActivities | 34,901 us-gaap_NetCashProvidedByUsedInInvestingActivities
Cash flows from financing activities: |  |
Proceeds from sale of common stock | 463,218 us-gaap_ProceedsFromIssuanceOfCommonStock | 0 us-gaap_ProceedsFromIssuanceOfCommonStock
Proceeds from revolving credit facility | 145,000 us-gaap_ProceedsFromLongTermLinesOfCredit | 0 us-gaap_ProceedsFromLongTermLinesOfCredit
Principal payments on revolving credit facility | (480,000)us-gaap_RepaymentsOfLongTermLinesOfCredit | (275,570)us-gaap_RepaymentsOfLongTermLinesOfCredit
Purchases of treasury stock | (1,520)us-gaap_PaymentsRelatedToTaxWithholdingForShareBasedCompensation | (3,025)us-gaap_PaymentsRelatedToTaxWithholdingForShareBasedCompensation
Other | 0 us-gaap_ProceedsFromPaymentsForOtherFinancingActivities | (176)us-gaap_ProceedsFromPaymentsForOtherFinancingActivities
Net cash provided by (used in) financing activities | 126,698 us-gaap_NetCashProvidedByUsedInFinancingActivities | (278,771)us-gaap_NetCashProvidedByUsedInFinancingActivities
Decrease in cash and cash equivalents | (35,623)us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease | (35,603)us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease
Cash and cash equivalents: |  |
Beginning of period | 45,811 us-gaap_CashAndCashEquivalentsAtCarryingValue | 91,901 us-gaap_CashAndCashEquivalentsAtCarryingValue
End of period | 10,188 us-gaap_CashAndCashEquivalentsAtCarryingValue | 56,298 us-gaap_CashAndCashEquivalentsAtCarryingValue
Supplemental non-cash transactions: |  |
Change in accrued capital expenditures | (90,189)us-gaap_CapitalExpendituresIncurredButNotYetPaid | 39,516 us-gaap_CapitalExpendituresIncurredButNotYetPaid
Change in asset retirement obligations | $ 1,413 oas_NonCashAssetRetirementObligations | $ (128)oas_NonCashAssetRetirementObligations

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- Definition The portion of profit or loss for the period, net of income taxes, which is attributable to the parent. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3602-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Other Comprehensive Income -URI http://asc.fasb.org/extlink&oid=51831270 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Net Income -URI http://asc.fasb.org/extlink&oid=51831255 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 225 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-04.19) -URI http://asc.fasb.org/extlink&oid=6879464&loc=d3e573970-122913 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.18) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 Reference 7: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 225 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-04.22) -URI http://asc.fasb.org/extlink&oid=6879464&loc=d3e573970-122913 Reference 8: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 19 -Article 5 Reference 9: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Paragraph 20 -Article 9 + Details
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- Definition The net cash outflow or inflow from derivative instruments during the period, which are classified as investing activities, excluding those designated as hedging instruments. + References No definition available. + Details
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- Definition Amount of cash outflow to satisfy an employee's income tax withholding obligation as part of a net-share settlement of a share-based award. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3291-108585 + Details
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- Definition The cash outflow for exploration and development of oil and gas properties. It includes cash payments related to development of oil and gas wells drilled at previously untested geologic structures (to determine the presence of oil or gas) and wells drilled at sites where the presence of oil or gas has already been established (to extract the oil or gas). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Investing Activities -URI http://asc.fasb.org/extlink&oid=6516133 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3213-108585 + Details
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- Definition The cash inflow associated with the amount received from the sale of a portion of the company's business, for example a segment, division, branch or other business, during the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Investing Activities -URI http://asc.fasb.org/extlink&oid=6516133 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 12 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3179-108585 + Details
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- Definition The cash inflow from the additional capital contribution to the entity. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3255-108585 + Details
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- Definition The cash inflow from a contractual arrangement with the lender, including letter of credit, standby letter of credit and revolving credit arrangements, under which borrowings can be made up to a specific amount at any point in time with maturities due beyond one year or the operating cycle, if longer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3255-108585 + Details
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- Definition The net cash inflow or outflow from other financing activities. This element is used when there is not a more specific and appropriate element in the taxonomy. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3095-108585 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 9 -URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3098-108585 + Details
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- Definition The cash outflow for the settlement of obligation drawn from a contractual arrangement with the lender, including letter of credit, standby letter of credit and revolving credit arrangements, under which borrowings can be made up to a specific amount at any point in time with maturities due beyond one year or the operating cycle, if longer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3291-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 + Details
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- Definition The aggregate amount of noncash, equity-based employee remuneration. This may include the value of stock or unit options, amortization of restricted stock or units, and adjustment for officers' compensation. As noncash, this element is an add back when calculating net cash generated by operating activities using the indirect method. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3602-108585 + Details
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