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Note 14 - Income Taxes (Details) - Components of Deferred Tax Assets and Liabilities (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2014
Dec. 31, 2013
Deferred tax assets:    
Federal net operating loss carryforwards $ 47,200us-gaap_DeferredTaxAssetsOperatingLossCarryforwardsDomestic $ 72,700us-gaap_DeferredTaxAssetsOperatingLossCarryforwardsDomestic
State net operating loss carryforwards 36,100us-gaap_DeferredTaxAssetsOperatingLossCarryforwardsStateAndLocal 38,082us-gaap_DeferredTaxAssetsOperatingLossCarryforwardsStateAndLocal
Alternative minimum tax and other tax credit carryforwards 27,582us-gaap_DeferredTaxAssetsTaxCreditCarryforwardsAlternativeMinimumTax 24,196us-gaap_DeferredTaxAssetsTaxCreditCarryforwardsAlternativeMinimumTax
Stock-based compensation expense 22,545us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost 26,651us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost
Warranty, litigation and other reserves 12,364us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsWarrantyReserves 15,543us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsWarrantyReserves
Receivables from related party 10,273mdc_DeferredTaxAssetsReceivablesFromRelatedParty 12,132mdc_DeferredTaxAssetsReceivablesFromRelatedParty
Accrued compensation 6,442us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsEmployeeCompensation 11,136us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsEmployeeCompensation
Asset impairment charges 2,785us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsImpairmentLosses 5,496us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsImpairmentLosses
Inventory, additional costs capitalized for tax purposes 3,257us-gaap_DeferredTaxAssetsInventory 1,700us-gaap_DeferredTaxAssetsInventory
Other, net 1,806us-gaap_DeferredTaxAssetsOther 3,446us-gaap_DeferredTaxAssetsOther
Total deferred tax assets 170,354us-gaap_DeferredTaxAssetsGross 211,082us-gaap_DeferredTaxAssetsGross
Valuation allowance (13,027)us-gaap_DeferredTaxAssetsValuationAllowance (14,669)us-gaap_DeferredTaxAssetsValuationAllowance
Total deferred tax assets, net of valuation allowance 157,327us-gaap_DeferredTaxAssetsNet 196,413us-gaap_DeferredTaxAssetsNet
Deferred tax liabilities:    
Property, equipment and other assets 5,025us-gaap_DeferredTaxLiabilitiesPropertyPlantAndEquipment 5,512us-gaap_DeferredTaxLiabilitiesPropertyPlantAndEquipment
Discount on notes receivable 4,149mdc_DeferredTaxLiabilityDiscountOnNotesReceivable 4,204mdc_DeferredTaxLiabilityDiscountOnNotesReceivable
Deferred revenue 4,306us-gaap_DeferredTaxLiabilitiesTaxDeferredIncome 3,985us-gaap_DeferredTaxLiabilitiesTaxDeferredIncome
Unrealized gain on marketable securities 1,737us-gaap_DeferredTaxLiabilitiesUnrealizedGainsOnTradingSecurities 4,915us-gaap_DeferredTaxLiabilitiesUnrealizedGainsOnTradingSecurities
Other, net 1,624us-gaap_DeferredTaxLiabilitiesOther 1,535us-gaap_DeferredTaxLiabilitiesOther
Total deferred tax liabilities 16,841us-gaap_DeferredIncomeTaxLiabilities 20,151us-gaap_DeferredIncomeTaxLiabilities
Net deferred tax asset $ 140,486us-gaap_DeferredTaxAssetsLiabilitiesNet $ 176,262us-gaap_DeferredTaxAssetsLiabilitiesNet