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Income Taxes - (Details) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2014
Dec. 31, 2013
Deferred tax liabilities:    
Real estate and real estate partnership basis differences $ 38,231aiv_DeferredTaxLiabilitiesPartnershipDifferences $ 26,110aiv_DeferredTaxLiabilitiesPartnershipDifferences
Deferred revenue 0us-gaap_DeferredTaxLiabilitiesTaxDeferredIncome 25,596us-gaap_DeferredTaxLiabilitiesTaxDeferredIncome
Total deferred tax liabilities 38,231us-gaap_DeferredIncomeTaxLiabilities 51,706us-gaap_DeferredIncomeTaxLiabilities
Deferred tax assets:    
Net operating, capital and other loss carryforwards 6,699us-gaap_DeferredTaxAssetsOperatingLossCarryforwards 62,651us-gaap_DeferredTaxAssetsOperatingLossCarryforwards
Receivables 45aiv_DeferredTaxAssetsReceivables 440aiv_DeferredTaxAssetsReceivables
Accruals and expenses 5,430us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAccruedLiabilities 9,272us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAccruedLiabilities
Tax credit carryforwards 29,714us-gaap_DeferredTaxAssetsTaxCreditCarryforwards 12,905us-gaap_DeferredTaxAssetsTaxCreditCarryforwards
Management contracts and other 222us-gaap_DeferredTaxAssetsOther 344us-gaap_DeferredTaxAssetsOther
Total deferred tax assets 42,110us-gaap_DeferredTaxAssetsGross 85,612us-gaap_DeferredTaxAssetsGross
Valuation allowance (3,627)us-gaap_DeferredTaxAssetsValuationAllowance (3,553)us-gaap_DeferredTaxAssetsValuationAllowance
Net deferred income tax assets $ 252us-gaap_DeferredTaxAssetsLiabilitiesNet $ 30,353us-gaap_DeferredTaxAssetsLiabilitiesNet