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UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $)
In Thousands, unless otherwise specified
3 Months Ended
Mar. 31, 2015
Mar. 31, 2014
CASH PROVIDED BY OPERATIONS:    
Net earnings $ 3,097us-gaap_NetIncomeLoss $ 5,363us-gaap_NetIncomeLoss
Adjustments to reconcile net earnings to net cash from operating activities -    
Depreciation, depletion and amortization 6,088us-gaap_DepreciationDepletionAndAmortization 6,106us-gaap_DepreciationDepletionAndAmortization
Property sale (gains) (512)us-gaap_GainLossOnDispositionOfAssets (55)us-gaap_GainLossOnDispositionOfAssets
Dry hole costs incurred 34us-gaap_ResultsOfOperationsDryHoleCosts 655us-gaap_ResultsOfOperationsDryHoleCosts
Impairment of oil and gas properties 208us-gaap_ImpairmentOfOilAndGasProperties 93us-gaap_ImpairmentOfOilAndGasProperties
Deferred income taxes (949)ae_DeferredIncomeTaxExpenseBenefitContinuingAndDiscontinuedOperations (551)ae_DeferredIncomeTaxExpenseBenefitContinuingAndDiscontinuedOperations
Net change in fair value contracts 39us-gaap_UnrealizedGainLossOnDerivativesAndCommodityContracts 316us-gaap_UnrealizedGainLossOnDerivativesAndCommodityContracts
Decrease (increase) in accounts receivable 25,501us-gaap_IncreaseDecreaseInAccountsReceivable 16,533us-gaap_IncreaseDecreaseInAccountsReceivable
Decrease (increase) in inventories (803)us-gaap_IncreaseDecreaseInInventories (11,921)us-gaap_IncreaseDecreaseInInventories
Decrease (increase) in income tax receivable 970us-gaap_IncreaseDecreaseInIncomeTaxesReceivable (1,739)us-gaap_IncreaseDecreaseInIncomeTaxesReceivable
Decrease (increase) in prepayments 342us-gaap_IncreaseDecreaseInPrepaidExpense 7,295us-gaap_IncreaseDecreaseInPrepaidExpense
Increase (decrease) in accounts payable (25,385)us-gaap_IncreaseDecreaseInAccountsPayable 11,720us-gaap_IncreaseDecreaseInAccountsPayable
Increase (decrease) in accrued liabilities 3,509us-gaap_IncreaseDecreaseInAccruedLiabilities 1,758us-gaap_IncreaseDecreaseInAccruedLiabilities
Other changes, net (8)us-gaap_OtherOperatingActivitiesCashFlowStatement (162)us-gaap_OtherOperatingActivitiesCashFlowStatement
Net cash provided by operating activities 12,131us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations 35,411us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations
INVESTING ACTIVITIES:    
Property and equipment additions (3,665)us-gaap_PaymentsToAcquirePropertyPlantAndEquipment (7,770)us-gaap_PaymentsToAcquirePropertyPlantAndEquipment
Insurance and state collateral (deposits) refunds (103)us-gaap_IncreaseDecreaseInDepositOtherAssets (122)us-gaap_IncreaseDecreaseInDepositOtherAssets
Proceeds from property sales 512us-gaap_ProceedsFromSaleOfPropertyPlantAndEquipment 55us-gaap_ProceedsFromSaleOfPropertyPlantAndEquipment
Net cash (used in) investing activities (3,256)us-gaap_NetCashProvidedByUsedInInvestingActivitiesContinuingOperations (7,837)us-gaap_NetCashProvidedByUsedInInvestingActivitiesContinuingOperations
FINANCING ACTIVITIES:    
Dividend payments (927)us-gaap_PaymentsOfDividends (928)us-gaap_PaymentsOfDividends
Net cash (used in) financing activities (927)us-gaap_NetCashProvidedByUsedInFinancingActivitiesContinuingOperations (928)us-gaap_NetCashProvidedByUsedInFinancingActivitiesContinuingOperations
Increase (decrease) in cash and cash equivalents 7,948us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease 26,646us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease
Cash and cash equivalents at beginning of period 80,184us-gaap_CashAndCashEquivalentsAtCarryingValue 60,733us-gaap_CashAndCashEquivalentsAtCarryingValue
Cash and cash equivalents at end of period $ 88,132us-gaap_CashAndCashEquivalentsAtCarryingValue $ 87,379us-gaap_CashAndCashEquivalentsAtCarryingValue