UBmatrix Calculation Trace Report
Line Concept Weight Decimals Precision Reported Calculated Source Message
1 Extended Link [ http://mdu.com/roles/ConsolidatedStatementsOfIncome ]
2 Context c00002 [ 2008-01-01 - 2008-06-30 ]
c-equal
3 Unit u000
u-equal
us-gaap:NetIncomeLoss -3 [6] 186558000 186,558,000 Instance OK
mdu:IncomeLossFromContinuingOperationsBeforeIncomeTaxes 1.0 -3 [6] 293613000 619,676,000 Instance Inconsistency found, calculated value is 619,676,000
us-gaap:OperatingIncomeLoss 1.0 -3 [6] 326063000 326,063,000 Instance
us-gaap:Revenues 1.0 -3 [7] 2373679000 2,373,679,000 Instance OK
mdu:ElectricNaturalGasDistributionAndPipelineAndEnergyServicesRevenues 1.0 -3 [6] 893586000 893,586,000 Instance
mdu:ConstructionServicesNaturalGasAndOilProductionConstructionMaterialsAndContractingAndOtherRevenues 1.0 -3 [7] 1480093000 1,480,093,000 Instance
us-gaap:OperatingExpenses -1.0 -3 [7] 2047616000 2,047,616,000 Instance OK
mdu:FuelAndPurchasedPower 1.0 -3 [5] 34495000 34,495,000 Instance
mdu:PurchasedNaturalGasSold 1.0 -3 [6] 421684000 421,684,000 Instance
mdu:ElectricNaturalGasDistributionAndPipelineAndEnergyServicesOperationAndMaintenanceExpense 1.0 -3 [6] 121390000 121,390,000 Instance
mdu:ConstructionServicesNaturalGasAndOilProductionConstructionMaterialsAndContractingAndOtherOperationAndMaintenanceExpense 1.0 -3 [7] 1185097000 1,185,097,000 Instance
us-gaap:TaxesOtherThanIncomeExciseProductionAndPropertyTaxes 1.0 -3 [6] 108041000 108,041,000 Instance
us-gaap:ImpairmentOfOilAndGasProperties 1.0 -3 [0] 0 0 Instance
us-gaap:DepreciationDepletionAndAmortization 1.0 -3 [6] 176909000 176,909,000 Instance
us-gaap:IncomeLossFromEquityMethodInvestments 1.0 -3 [4] 3864000 3,864,000 Instance
us-gaap:InterestExpense -1.0 -3 [5] 37842000 37,842,000 Instance
us-gaap:OtherNonoperatingIncomeExpense 1.0 -3 [4] 1528000 1,528,000 Instance
us-gaap:IncomeTaxExpenseBenefit -1.0 -3 [6] 107055000 107,055,000 Instance
2 Context c00004 [ 2009-01-01 - 2009-06-30 ]
c-equal
3 Unit u000
u-equal
us-gaap:NetIncomeLoss -3 [6] -288491000 -288,491,000 Instance OK
mdu:IncomeLossFromContinuingOperationsBeforeIncomeTaxes 1.0 -3 [6] -474591000 -915,445,000 Instance Inconsistency found, calculated value is -915,445,000
us-gaap:OperatingIncomeLoss 1.0 -3 [6] -440854000 -440,854,000 Instance
us-gaap:Revenues 1.0 -3 [7] 2052045000 2,052,045,000 Instance OK
mdu:ElectricNaturalGasDistributionAndPipelineAndEnergyServicesRevenues 1.0 -3 [6] 858191000 858,191,000 Instance
mdu:ConstructionServicesNaturalGasAndOilProductionConstructionMaterialsAndContractingAndOtherRevenues 1.0 -3 [7] 1193854000 1,193,854,000 Instance
us-gaap:OperatingExpenses -1.0 -3 [7] 2492899000 2,492,899,000 Instance OK
mdu:FuelAndPurchasedPower 1.0 -3 [5] 33896000 33,896,000 Instance
mdu:PurchasedNaturalGasSold 1.0 -3 [6] 462897000 462,897,000 Instance
mdu:ElectricNaturalGasDistributionAndPipelineAndEnergyServicesOperationAndMaintenanceExpense 1.0 -3 [6] 133932000 133,932,000 Instance
mdu:ConstructionServicesNaturalGasAndOilProductionConstructionMaterialsAndContractingAndOtherOperationAndMaintenanceExpense 1.0 -3 [6] 976706000 976,706,000 Instance
us-gaap:TaxesOtherThanIncomeExciseProductionAndPropertyTaxes 1.0 -3 [5] 91774000 91,774,000 Instance
us-gaap:ImpairmentOfOilAndGasProperties 1.0 -3 [6] 620000000 620,000,000 Instance
us-gaap:DepreciationDepletionAndAmortization 1.0 -3 [6] 173694000 173,694,000 Instance
us-gaap:IncomeLossFromEquityMethodInvestments 1.0 -3 [4] 3864000 3,864,000 Instance
us-gaap:InterestExpense -1.0 -3 [5] 41755000 41,755,000 Instance
us-gaap:OtherNonoperatingIncomeExpense 1.0 -3 [4] 4154000 4,154,000 Instance
us-gaap:IncomeTaxExpenseBenefit -1.0 -3 [6] -186100000 -186,100,000 Instance
2 Context c00006 [ 2008-04-01 - 2008-06-30 ]
c-equal
3 Unit u000
u-equal
us-gaap:NetIncomeLoss -3 [6] 115507000 115,507,000 Instance OK
mdu:IncomeLossFromContinuingOperationsBeforeIncomeTaxes 1.0 -3 [6] 181307000 379,798,000 Instance Inconsistency found, calculated value is 379,798,000
us-gaap:OperatingIncomeLoss 1.0 -3 [6] 198491000 198,491,000 Instance
us-gaap:Revenues 1.0 -3 [7] 1251772000 1,251,772,000 Instance OK
mdu:ElectricNaturalGasDistributionAndPipelineAndEnergyServicesRevenues 1.0 -3 [6] 376324000 376,324,000 Instance
mdu:ConstructionServicesNaturalGasAndOilProductionConstructionMaterialsAndContractingAndOtherRevenues 1.0 -3 [6] 875448000 875,448,000 Instance
us-gaap:OperatingExpenses -1.0 -3 [7] 1053281000 1,053,281,000 Instance OK
mdu:FuelAndPurchasedPower 1.0 -3 [5] 15718000 15,718,000 Instance
mdu:PurchasedNaturalGasSold 1.0 -3 [6] 145060000 145,060,000 Instance
mdu:ElectricNaturalGasDistributionAndPipelineAndEnergyServicesOperationAndMaintenanceExpense 1.0 -3 [5] 61828000 61,828,000 Instance
mdu:ConstructionServicesNaturalGasAndOilProductionConstructionMaterialsAndContractingAndOtherOperationAndMaintenanceExpense 1.0 -3 [6] 687479000 687,479,000 Instance
us-gaap:TaxesOtherThanIncomeExciseProductionAndPropertyTaxes 1.0 -3 [5] 53518000 53,518,000 Instance
us-gaap:ImpairmentOfOilAndGasProperties 1.0 -3 [0] 0 0 Instance
us-gaap:DepreciationDepletionAndAmortization 1.0 -3 [5] 89678000 89,678,000 Instance
us-gaap:IncomeLossFromEquityMethodInvestments 1.0 -3 [4] 2039000 2,039,000 Instance
us-gaap:InterestExpense -1.0 -3 [5] 19186000 19,186,000 Instance
us-gaap:OtherNonoperatingIncomeExpense 1.0 -3 [2] -37000 -37,000 Instance
us-gaap:IncomeTaxExpenseBenefit -1.0 -3 [5] 65800000 65,800,000 Instance
2 Context c00007 [ 2009-04-01 - 2009-06-30 ]
c-equal
3 Unit u000
u-equal
us-gaap:NetIncomeLoss -3 [5] 55311000 55,311,000 Instance OK
mdu:IncomeLossFromContinuingOperationsBeforeIncomeTaxes 1.0 -3 [5] 83819000 183,880,000 Instance Inconsistency found, calculated value is 183,880,000
us-gaap:OperatingIncomeLoss 1.0 -3 [6] 100065000 100,065,000 Instance
us-gaap:Revenues 1.0 -3 [6] 958040000 958,040,000 Instance OK
mdu:ElectricNaturalGasDistributionAndPipelineAndEnergyServicesRevenues 1.0 -3 [6] 263617000 263,617,000 Instance
mdu:ConstructionServicesNaturalGasAndOilProductionConstructionMaterialsAndContractingAndOtherRevenues 1.0 -3 [6] 694423000 694,423,000 Instance
us-gaap:OperatingExpenses -1.0 -3 [6] 857975000 857,975,000 Instance OK
mdu:FuelAndPurchasedPower 1.0 -3 [5] 15166000 15,166,000 Instance
mdu:PurchasedNaturalGasSold 1.0 -3 [6] 106401000 106,401,000 Instance
mdu:ElectricNaturalGasDistributionAndPipelineAndEnergyServicesOperationAndMaintenanceExpense 1.0 -3 [5] 62581000 62,581,000 Instance
mdu:ConstructionServicesNaturalGasAndOilProductionConstructionMaterialsAndContractingAndOtherOperationAndMaintenanceExpense 1.0 -3 [6] 554556000 554,556,000 Instance
us-gaap:TaxesOtherThanIncomeExciseProductionAndPropertyTaxes 1.0 -3 [5] 38822000 38,822,000 Instance
us-gaap:ImpairmentOfOilAndGasProperties 1.0 -3 [0] 0 0 Instance
us-gaap:DepreciationDepletionAndAmortization 1.0 -3 [5] 80449000 80,449,000 Instance
us-gaap:IncomeLossFromEquityMethodInvestments 1.0 -3 [4] 2078000 2,078,000 Instance
us-gaap:InterestExpense -1.0 -3 [5] 20759000 20,759,000 Instance
us-gaap:OtherNonoperatingIncomeExpense 1.0 -3 [4] 2435000 2,435,000 Instance
us-gaap:IncomeTaxExpenseBenefit -1.0 -3 [5] 28508000 28,508,000 Instance


1 Extended Link [ http://mdu.com/roles/ConsolidatedStatementOfCashFlows ]
2 Context c00002 [ 2008-01-01 - 2008-06-30 ]
c-equal
3 Unit u000
u-equal
us-gaap:CashAndCashEquivalentsPeriodIncreaseDecrease -3 [5] -23781000 -23,781,000 Instance OK
us-gaap:NetCashProvidedByUsedInOperatingActivities 1.0 -3 [6] 238805000 238,805,000 Instance OK
us-gaap:NetIncomeLoss 1.0 -3 [6] 186558000 186,558,000 Instance
us-gaap:IncomeLossFromEquityMethodInvestmentsNetOfDividendsOrDistributions 1.0 -3 [4] -1844000 -1,844,000 Instance
us-gaap:DeferredIncomeTaxExpenseBenefit 1.0 -3 [5] 34870000 34,870,000 Instance
us-gaap:ImpairmentOfOilAndGasProperties 1.0 -3 [0] 0 0 Instance
us-gaap:IncreaseDecreaseInReceivables 1.0 -3 [5] -46550000 -46,550,000 Instance
us-gaap:IncreaseDecreaseInInventories 1.0 -3 [5] -36482000 -36,482,000 Instance
mdu:IncreaseDecreaseInOtherCurrentAssets 1.0 -3 [6] -111199000 -111,199,000 Instance
us-gaap:IncreaseDecreaseInAccountsPayable 1.0 -3 [5] 18953000 18,953,000 Instance
mdu:IncreaseDecreaseInOtherCurrentLiabilities 1.0 -3 [5] 11209000 11,209,000 Instance
mdu:OtherNoncurrentChanges 1.0 -3 [4] 6381000 6,381,000 Instance
us-gaap:DepreciationDepletionAndAmortization 1.0 -3 [6] 176909000 176,909,000 Instance
us-gaap:NetCashProvidedByUsedInInvestingActivities 1.0 -3 [6] -550437000 -550,437,000 Instance OK
mdu:CapitalExpenditures 1.0 -3 [6] -386014000 -386,014,000 Instance
mdu:AcquisitionsNetOfCashAcquired 1.0 -3 [6] -271191000 -271,191,000 Instance
us-gaap:ProceedsFromSaleOfPropertyPlantAndEquipment 1.0 -3 [5] 26379000 26,379,000 Instance
us-gaap:PaymentsForProceedsFromInvestments -1.0 -3 [5] -80389000 -80,389,000 Instance
us-gaap:NetCashProvidedByUsedInFinancingActivities 1.0 -3 [6] 287653000 127,733,000 Instance Inconsistency found, calculated value is 127,733,000
mdu:RepaymentOfShortTermBorrowings 1.0 -3 [4] -1700000 -1,700,000 Instance
mdu:IssuanceOfShortTermBorrowings -1.0 -3 [5] 79960000 79,960,000 Instance
us-gaap:ProceedsFromIssuanceOfLongTermDebt 1.0 -3 [6] 379644000 379,644,000 Instance
us-gaap:RepaymentsOfLongTermDebt -1.0 -3 [6] 125637000 125,637,000 Instance
us-gaap:ProceedsFromIssuanceOfCommonStock 1.0 -3 [4] 4945000 4,945,000 Instance
us-gaap:PaymentsOfDividends -1.0 -3 [5] 53296000 53,296,000 Instance
us-gaap:ExcessTaxBenefitFromShareBasedCompensationFinancingActivities 1.0 -3 [4] 3737000 3,737,000 Instance
us-gaap:EffectOfExchangeRateOnCashAndCashEquivalents 1.0 -3 [3] 198000 198,000 Instance
2 Context c00004 [ 2009-01-01 - 2009-06-30 ]
c-equal
3 Unit u000
u-equal
us-gaap:CashAndCashEquivalentsPeriodIncreaseDecrease -3 [5] -17404000 -17,404,000 Instance OK
us-gaap:NetCashProvidedByUsedInOperatingActivities 1.0 -3 [6] 398425000 398,425,000 Instance OK
us-gaap:NetIncomeLoss 1.0 -3 [6] -288491000 -288,491,000 Instance
us-gaap:IncomeLossFromEquityMethodInvestmentsNetOfDividendsOrDistributions 1.0 -3 [4] -1685000 -1,685,000 Instance
us-gaap:DeferredIncomeTaxExpenseBenefit 1.0 -3 [6] -206955000 -206,955,000 Instance
us-gaap:ImpairmentOfOilAndGasProperties 1.0 -3 [6] 620000000 620,000,000 Instance
us-gaap:IncreaseDecreaseInReceivables 1.0 -3 [6] 149782000 149,782,000 Instance
us-gaap:IncreaseDecreaseInInventories 1.0 -3 [5] -26574000 -26,574,000 Instance
mdu:IncreaseDecreaseInOtherCurrentAssets 1.0 -3 [5] 47837000 47,837,000 Instance
us-gaap:IncreaseDecreaseInAccountsPayable 1.0 -3 [5] -66260000 -66,260,000 Instance
mdu:IncreaseDecreaseInOtherCurrentLiabilities 1.0 -3 [4] 2218000 2,218,000 Instance
mdu:OtherNoncurrentChanges 1.0 -3 [4] -5141000 -5,141,000 Instance
us-gaap:DepreciationDepletionAndAmortization 1.0 -3 [6] 173694000 173,694,000 Instance
us-gaap:NetCashProvidedByUsedInInvestingActivities 1.0 -3 [6] -271505000 -271,505,000 Instance OK
mdu:CapitalExpenditures 1.0 -3 [6] -272867000 -272,867,000 Instance
mdu:AcquisitionsNetOfCashAcquired 1.0 -3 [4] -3764000 -3,764,000 Instance
us-gaap:ProceedsFromSaleOfPropertyPlantAndEquipment 1.0 -3 [4] 7494000 7,494,000 Instance
us-gaap:PaymentsForProceedsFromInvestments -1.0 -3 [4] 2368000 2,368,000 Instance
us-gaap:NetCashProvidedByUsedInFinancingActivities 1.0 -3 [6] -144621000 -144,621,000 Instance OK
mdu:RepaymentOfShortTermBorrowings 1.0 -3 [6] -105100000 -105,100,000 Instance
mdu:IssuanceOfShortTermBorrowings -1.0 -3 [0] 0 0 Instance
us-gaap:ProceedsFromIssuanceOfLongTermDebt 1.0 -3 [6] 109400000 109,400,000 Instance
us-gaap:RepaymentsOfLongTermDebt -1.0 -3 [5] 92024000 92,024,000 Instance
us-gaap:ProceedsFromIssuanceOfCommonStock 1.0 -3 [3] 284000 284,000 Instance
us-gaap:PaymentsOfDividends -1.0 -3 [5] 57325000 57,325,000 Instance
us-gaap:ExcessTaxBenefitFromShareBasedCompensationFinancingActivities 1.0 -3 [3] 144000 144,000 Instance
us-gaap:EffectOfExchangeRateOnCashAndCashEquivalents 1.0 -3 [3] 297000 297,000 Instance


1 Extended Link [ http://mdu.com/roles/ConsolidatedBalanceSheets ]
2 Context c00000 [ 2009-06-30 - ]
c-equal
3 Unit u000
u-equal
us-gaap:Assets -3 [7] 5823364000 5,823,364,000 Instance OK
us-gaap:AssetsCurrent 1.0 -3 [7] 1063852000 1,063,852,000 Instance OK
us-gaap:CashAndCashEquivalentsAtCarryingValue 1.0 -3 [5] 34310000 34,310,000 Instance
us-gaap:ReceivablesNetCurrent 1.0 -3 [6] 559842000 559,842,000 Instance
us-gaap:InventoryNet 1.0 -3 [6] 285814000 285,814,000 Instance
us-gaap:DeferredTaxAssetsNetCurrent 1.0 -3 [4] 2490000 2,490,000 Instance
us-gaap:ShortTermInvestments 1.0 -3 [4] 1967000 1,967,000 Instance
us-gaap:DerivativeAssetsCurrent 1.0 -3 [5] 62048000 62,048,000 Instance
mdu:PrepaymentsAndOtherCurrentAssets 1.0 -3 [6] 117381000 117,381,000 Instance
mdu:InvestmentsNoncurrent 1.0 -3 [6] 125361000 125,361,000 Instance
us-gaap:PropertyPlantAndEquipmentNet 1.0 -3 [7] 3744264000 3,744,264,000 Instance OK
us-gaap:PropertyPlantAndEquipmentGross 1.0 -3 [7] 6651088000 6,651,088,000 Instance
us-gaap:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment -1.0 -3 [7] 2906824000 2,906,824,000 Instance
mdu:TotalDeferredChargesAndOtherAssets 1.0 -3 [6] 889887000 889,887,000 Instance OK
us-gaap:Goodwill 1.0 -3 [6] 622131000 622,131,000 Instance
us-gaap:IntangibleAssetsNetExcludingGoodwill 1.0 -3 [5] 25320000 25,320,000 Instance
us-gaap:OtherAssetsNoncurrent 1.0 -3 [6] 242436000 242,436,000 Instance
us-gaap:LiabilitiesAndStockholdersEquity -3 [7] 5823364000 5,823,364,000 Instance OK
us-gaap:LiabilitiesCurrent 1.0 -3 [6] 691614000 691,614,000 Instance OK
us-gaap:ShortTermBorrowings 1.0 -3 [0] 0 0 Instance
us-gaap:LongTermDebtAndCapitalLeaseObligationsCurrent 1.0 -3 [5] 27879000 27,879,000 Instance
us-gaap:AccountsPayableCurrentAndNoncurrent 1.0 -3 [6] 332957000 332,957,000 Instance
us-gaap:TaxesPayableCurrentAndNoncurrent 1.0 -3 [5] 42151000 42,151,000 Instance
us-gaap:DeferredTaxLiabilitiesCurrent 1.0 -3 [0] 0 0 Instance
us-gaap:DividendsPayableCurrentAndNoncurrent 1.0 -3 [5] 28686000 28,686,000 Instance
us-gaap:AccruedSalariesCurrentAndNoncurrent 1.0 -3 [5] 44141000 44,141,000 Instance
us-gaap:DerivativeLiabilitiesCurrent 1.0 -3 [5] 57139000 57,139,000 Instance
us-gaap:OtherAccruedLiabilitiesCurrentAndNoncurrent 1.0 -3 [6] 158661000 158,661,000 Instance
us-gaap:LongTermDebtAndCapitalLeaseObligations 1.0 -3 [7] 1636592000 1,636,592,000 Instance
us-gaap:LiabilitiesNoncurrent 1.0 -3 [7] 1085056000 1,085,056,000 Instance OK
us-gaap:DeferredTaxLiabilitiesNoncurrent 1.0 -3 [6] 540952000 540,952,000 Instance
us-gaap:OtherLiabilitiesNoncurrent 1.0 -3 [6] 544104000 544,104,000 Instance
us-gaap:StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest 1.0 -3 [7] 2410102000 2,410,102,000 Instance OK
us-gaap:PreferredStockValue 1.0 -3 [5] 15000000 15,000,000 Instance
mdu:CommonStockholdersEquity 1.0 -3 [7] 2395102000 2,395,102,000 Instance OK
us-gaap:CommonStockValue 1.0 -3 [6] 184508000 184,508,000 Instance
us-gaap:AdditionalPaidInCapital 1.0 -3 [6] 941773000 941,773,000 Instance
us-gaap:RetainedEarningsAccumulatedDeficit 1.0 -3 [7] 1270778000 1,270,778,000 Instance
us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax 1.0 -3 [4] 1669000 1,669,000 Instance
us-gaap:TreasuryStockValue -1.0 -3 [4] 3626000 3,626,000 Instance
2 Context c00001 [ 2008-06-30 - ]
c-equal
3 Unit u000
u-equal
us-gaap:Assets -3 [7] 6211732000 6,211,732,000 Instance OK
us-gaap:AssetsCurrent 1.0 -3 [7] 1355046000 1,355,046,000 Instance OK
us-gaap:CashAndCashEquivalentsAtCarryingValue 1.0 -3 [5] 82039000 82,039,000 Instance
us-gaap:ReceivablesNetCurrent 1.0 -3 [6] 769379000 769,379,000 Instance
us-gaap:InventoryNet 1.0 -3 [6] 267125000 267,125,000 Instance
us-gaap:DeferredTaxAssetsNetCurrent 1.0 -3 [5] 47442000 47,442,000 Instance
us-gaap:ShortTermInvestments 1.0 -3 [5] 13768000 13,768,000 Instance
us-gaap:DerivativeAssetsCurrent 1.0 -3 [5] 64193000 64,193,000 Instance
mdu:PrepaymentsAndOtherCurrentAssets 1.0 -3 [6] 111100000 111,100,000 Instance
mdu:InvestmentsNoncurrent 1.0 -3 [6] 121279000 121,279,000 Instance
us-gaap:PropertyPlantAndEquipmentNet 1.0 -3 [7] 4099071000 4,099,071,000 Instance OK
us-gaap:PropertyPlantAndEquipmentGross 1.0 -3 [7] 6507164000 6,507,164,000 Instance
us-gaap:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment -1.0 -3 [7] 2408093000 2,408,093,000 Instance
mdu:TotalDeferredChargesAndOtherAssets 1.0 -3 [6] 636336000 636,336,000 Instance OK
us-gaap:Goodwill 1.0 -3 [6] 437832000 437,832,000 Instance
us-gaap:IntangibleAssetsNetExcludingGoodwill 1.0 -3 [5] 32485000 32,485,000 Instance
us-gaap:OtherAssetsNoncurrent 1.0 -3 [6] 166019000 166,019,000 Instance
us-gaap:LiabilitiesAndStockholdersEquity -3 [7] 6211732000 6,211,732,000 Instance OK
us-gaap:LiabilitiesCurrent 1.0 -3 [6] 987748000 987,748,000 Instance OK
us-gaap:ShortTermBorrowings 1.0 -3 [5] 79960000 79,960,000 Instance
us-gaap:LongTermDebtAndCapitalLeaseObligationsCurrent 1.0 -3 [5] 87366000 87,366,000 Instance
us-gaap:AccountsPayableCurrentAndNoncurrent 1.0 -3 [6] 396715000 396,715,000 Instance
us-gaap:TaxesPayableCurrentAndNoncurrent 1.0 -3 [5] 46200000 46,200,000 Instance
us-gaap:DeferredTaxLiabilitiesCurrent 1.0 -3 [0] 0 0 Instance
us-gaap:DividendsPayableCurrentAndNoncurrent 1.0 -3 [5] 26723000 26,723,000 Instance
us-gaap:AccruedSalariesCurrentAndNoncurrent 1.0 -3 [5] 55631000 55,631,000 Instance
us-gaap:DerivativeLiabilitiesCurrent 1.0 -3 [5] 98631000 98,631,000 Instance
us-gaap:OtherAccruedLiabilitiesCurrentAndNoncurrent 1.0 -3 [6] 196522000 196,522,000 Instance
us-gaap:LongTermDebtAndCapitalLeaseObligations 1.0 -3 [7] 1474908000 1,474,908,000 Instance
us-gaap:LiabilitiesNoncurrent 1.0 -3 [7] 1158469000 1,158,469,000 Instance OK
us-gaap:DeferredTaxLiabilitiesNoncurrent 1.0 -3 [6] 685480000 685,480,000 Instance
us-gaap:OtherLiabilitiesNoncurrent 1.0 -3 [6] 472989000 472,989,000 Instance
us-gaap:StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest 1.0 -3 [7] 2590607000 2,590,607,000 Instance OK
us-gaap:PreferredStockValue 1.0 -3 [5] 15000000 15,000,000 Instance
mdu:CommonStockholdersEquity 1.0 -3 [7] 2575607000 2,575,607,000 Instance OK
us-gaap:CommonStockValue 1.0 -3 [6] 183706000 183,706,000 Instance
us-gaap:AdditionalPaidInCapital 1.0 -3 [6] 925784000 925,784,000 Instance
us-gaap:RetainedEarningsAccumulatedDeficit 1.0 -3 [7] 1567035000 1,567,035,000 Instance
us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax 1.0 -3 [5] -97292000 -97,292,000 Instance
us-gaap:TreasuryStockValue -1.0 -3 [4] 3626000 3,626,000 Instance
2 Context c00003 [ 2008-12-31 - ]
c-equal
3 Unit u000
u-equal
us-gaap:Assets -3 [7] 6587845000 6,587,845,000 Instance OK
us-gaap:AssetsCurrent 1.0 -3 [7] 1272292000 1,272,292,000 Instance OK
us-gaap:CashAndCashEquivalentsAtCarryingValue 1.0 -3 [5] 51714000 51,714,000 Instance
us-gaap:ReceivablesNetCurrent 1.0 -3 [6] 707109000 707,109,000 Instance
us-gaap:InventoryNet 1.0 -3 [6] 261524000 261,524,000 Instance
us-gaap:DeferredTaxAssetsNetCurrent 1.0 -3 [0] 0 0 Instance
us-gaap:ShortTermInvestments 1.0 -3 [4] 2467000 2,467,000 Instance
us-gaap:DerivativeAssetsCurrent 1.0 -3 [5] 78164000 78,164,000 Instance
mdu:PrepaymentsAndOtherCurrentAssets 1.0 -3 [6] 171314000 171,314,000 Instance
mdu:InvestmentsNoncurrent 1.0 -3 [6] 114290000 114,290,000 Instance
us-gaap:PropertyPlantAndEquipmentNet 1.0 -3 [7] 4300918000 4,300,918,000 Instance OK
us-gaap:PropertyPlantAndEquipmentGross 1.0 -3 [7] 7062237000 7,062,237,000 Instance
us-gaap:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment -1.0 -3 [7] 2761319000 2,761,319,000 Instance
mdu:TotalDeferredChargesAndOtherAssets 1.0 -3 [6] 900345000 900,345,000 Instance OK
us-gaap:Goodwill 1.0 -3 [6] 615735000 615,735,000 Instance
us-gaap:IntangibleAssetsNetExcludingGoodwill 1.0 -3 [5] 28392000 28,392,000 Instance
us-gaap:OtherAssetsNoncurrent 1.0 -3 [6] 256218000 256,218,000 Instance
us-gaap:LiabilitiesAndStockholdersEquity -3 [7] 6587845000 6,587,845,000 Instance OK
us-gaap:LiabilitiesCurrent 1.0 -3 [6] 967475000 967,475,000 Instance OK
us-gaap:ShortTermBorrowings 1.0 -3 [6] 105100000 105,100,000 Instance
us-gaap:LongTermDebtAndCapitalLeaseObligationsCurrent 1.0 -3 [5] 78666000 78,666,000 Instance
us-gaap:AccountsPayableCurrentAndNoncurrent 1.0 -3 [6] 432358000 432,358,000 Instance
us-gaap:TaxesPayableCurrentAndNoncurrent 1.0 -3 [5] 49784000 49,784,000 Instance
us-gaap:DeferredTaxLiabilitiesCurrent 1.0 -3 [5] 20344000 20,344,000 Instance
us-gaap:DividendsPayableCurrentAndNoncurrent 1.0 -3 [5] 28640000 28,640,000 Instance
us-gaap:AccruedSalariesCurrentAndNoncurrent 1.0 -3 [5] 55646000 55,646,000 Instance
us-gaap:DerivativeLiabilitiesCurrent 1.0 -3 [5] 56529000 56,529,000 Instance
us-gaap:OtherAccruedLiabilitiesCurrentAndNoncurrent 1.0 -3 [6] 140408000 140,408,000 Instance
us-gaap:LongTermDebtAndCapitalLeaseObligations 1.0 -3 [7] 1568636000 1,568,636,000 Instance
us-gaap:LiabilitiesNoncurrent 1.0 -3 [7] 1290658000 1,290,658,000 Instance OK
us-gaap:DeferredTaxLiabilitiesNoncurrent 1.0 -3 [6] 727857000 727,857,000 Instance
us-gaap:OtherLiabilitiesNoncurrent 1.0 -3 [6] 562801000 562,801,000 Instance
us-gaap:StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest 1.0 -3 [7] 2761076000 2,761,076,000 Instance OK
us-gaap:PreferredStockValue 1.0 -3 [5] 15000000 15,000,000 Instance
mdu:CommonStockholdersEquity 1.0 -3 [7] 2746076000 2,746,076,000 Instance OK
us-gaap:CommonStockValue 1.0 -3 [6] 184208000 184,208,000 Instance
us-gaap:AdditionalPaidInCapital 1.0 -3 [6] 938299000 938,299,000 Instance
us-gaap:RetainedEarningsAccumulatedDeficit 1.0 -3 [7] 1616830000 1,616,830,000 Instance
us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax 1.0 -3 [5] 10365000 10,365,000 Instance
us-gaap:TreasuryStockValue -1.0 -3 [4] 3626000 3,626,000 Instance


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