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v2.4.1.9

Income Taxes (Details 3) (USD $) In Thousands, unless otherwise specified | Dec. 31, 2014 | Dec. 31, 2013
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Deferred tax assets: |  |
Loans receivable, principally due to the allowance for probable loan losses | $ 24,849 us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsProvisionForLoanLosses | $ 25,365 us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsProvisionForLoanLosses
Other real estate owned | 3,453 iboc_DeferredTaxAssetsOtherRealEstateOwned | 3,878 iboc_DeferredTaxAssetsOtherRealEstateOwned
Impairment charges on available-for-sale securities | 5,618 us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsImpairmentLosses | 5,327 us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsImpairmentLosses
Accrued expenses | 268 us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAccruedLiabilities | 399 us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAccruedLiabilities
Net unrealized gains on available for sale investment securities |  | 24,235 iboc_DeferredTaxAssetsUnrealizedGainsOnAvailableForSaleSecurities
Other | 5,809 us-gaap_DeferredTaxAssetsOther | 4,816 us-gaap_DeferredTaxAssetsOther
Total deferred tax assets | 39,997 us-gaap_DeferredTaxAssetsGross | 64,020 us-gaap_DeferredTaxAssetsGross
Deferred tax liabilities: |  |
Bank premises and equipment, principally due to differences on depreciation | (18,314)us-gaap_DeferredTaxLiabilitiesPropertyPlantAndEquipment | (20,729)us-gaap_DeferredTaxLiabilitiesPropertyPlantAndEquipment
Net unrealized gains on available for sale investment securities | (6,182)us-gaap_DeferredTaxLiabilitiesOtherComprehensiveIncome |
Identified intangible assets and goodwill | (18,787)us-gaap_DeferredTaxLiabilitiesGoodwillAndIntangibleAssets | (18,051)us-gaap_DeferredTaxLiabilitiesGoodwillAndIntangibleAssets
Other | (12,303)us-gaap_DeferredTaxLiabilitiesOther | (11,476)us-gaap_DeferredTaxLiabilitiesOther
Total deferred tax liabilities | (55,586)us-gaap_DeferredTaxLiabilities | (50,256)us-gaap_DeferredTaxLiabilities
Net deferred tax asset (liability) | $ (15,589)us-gaap_DeferredTaxAssetsLiabilitiesNet | $ 13,764 us-gaap_DeferredTaxAssetsLiabilitiesNet

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