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Derivative Financial Instruments (Details) (USD $)
3 Months Ended 12 Months Ended
Mar. 31, 2015
Dec. 31, 2014
Nov. 07, 2013
derivative
Derivatives, Fair Value [Line Items]      
Owned and pledged as collateral 1,500,000us-gaap_FinancialInstrumentsOwnedAndPledgedAsCollateralAtFairValue    
Designated as Hedging Instrument [Member]      
Derivatives, Fair Value [Line Items]      
Number of interest rate swaps held     2us-gaap_DerivativeNumberOfInstrumentsHeld
/ us-gaap_HedgingDesignationAxis
= us-gaap_DesignatedAsHedgingInstrumentMember
Description of terms three-month LIBOR    
Interest Rate Swap 1 [Member] | Interest Expense [Member]      
Gain (Loss) Recognized in Other Comprehensive Income, Net [Abstract]      
Gain (Loss) reclassified from accumulated OCI into income (effective portion) 0us-gaap_DerivativeInstrumentsGainLossReclassifiedFromAccumulatedOCIIntoIncomeEffectivePortionNet
/ us-gaap_DerivativeInstrumentRiskAxis
= hbia_InterestRateSwap1Member
/ us-gaap_IncomeStatementLocationAxis
= us-gaap_InterestExpenseMember
0us-gaap_DerivativeInstrumentsGainLossReclassifiedFromAccumulatedOCIIntoIncomeEffectivePortionNet
/ us-gaap_DerivativeInstrumentRiskAxis
= hbia_InterestRateSwap1Member
/ us-gaap_IncomeStatementLocationAxis
= us-gaap_InterestExpenseMember
 
Interest Rate Swap 1 [Member] | Other Income [Member]      
Gain (Loss) Recognized in Other Comprehensive Income, Net [Abstract]      
Gain (Loss) recognized in income (ineffective portion) 0us-gaap_DerivativeNetHedgeIneffectivenessGainLoss
/ us-gaap_DerivativeInstrumentRiskAxis
= hbia_InterestRateSwap1Member
/ us-gaap_IncomeStatementLocationAxis
= us-gaap_OtherIncomeMember
0us-gaap_DerivativeNetHedgeIneffectivenessGainLoss
/ us-gaap_DerivativeInstrumentRiskAxis
= hbia_InterestRateSwap1Member
/ us-gaap_IncomeStatementLocationAxis
= us-gaap_OtherIncomeMember
 
Interest Rate Swap 1 [Member] | Accumulated Other Comprehensive Income (Loss) [Member]      
Gain (Loss) Recognized in Other Comprehensive Income, Net [Abstract]      
Gain (loss) recognized in other comprehensive income (effective portion) (294,000)us-gaap_DerivativeInstrumentsGainLossRecognizedInOtherComprehensiveIncomeEffectivePortionNet
/ us-gaap_BalanceSheetLocationAxis
= us-gaap_AccumulatedOtherComprehensiveIncomeMember
/ us-gaap_DerivativeInstrumentRiskAxis
= hbia_InterestRateSwap1Member
(754,000)us-gaap_DerivativeInstrumentsGainLossRecognizedInOtherComprehensiveIncomeEffectivePortionNet
/ us-gaap_BalanceSheetLocationAxis
= us-gaap_AccumulatedOtherComprehensiveIncomeMember
/ us-gaap_DerivativeInstrumentRiskAxis
= hbia_InterestRateSwap1Member
 
Interest Rate Swap 1 [Member] | Other Liabilities [Member]      
Derivative instrument according to type of hedges [Abstract]      
Notional Amount 25,000,000us-gaap_DerivativeAssetNotionalAmount
/ us-gaap_BalanceSheetLocationAxis
= us-gaap_OtherLiabilitiesMember
/ us-gaap_DerivativeInstrumentRiskAxis
= hbia_InterestRateSwap1Member
  25,000,000.00us-gaap_DerivativeAssetNotionalAmount
/ us-gaap_BalanceSheetLocationAxis
= us-gaap_OtherLiabilitiesMember
/ us-gaap_DerivativeInstrumentRiskAxis
= hbia_InterestRateSwap1Member
Fair Value (1,340,000)us-gaap_DerivativeFairValueOfDerivativeNet
/ us-gaap_BalanceSheetLocationAxis
= us-gaap_OtherLiabilitiesMember
/ us-gaap_DerivativeInstrumentRiskAxis
= hbia_InterestRateSwap1Member
   
Maturity Nov. 09, 2020    
Interest Rate Swap 1 [Member] | Other Assets [Member]      
Derivative instrument according to type of hedges [Abstract]      
Notional Amount   25,000,000us-gaap_DerivativeAssetNotionalAmount
/ us-gaap_BalanceSheetLocationAxis
= us-gaap_OtherAssetsMember
/ us-gaap_DerivativeInstrumentRiskAxis
= hbia_InterestRateSwap1Member
 
Fair Value   (864,000)us-gaap_DerivativeFairValueOfDerivativeNet
/ us-gaap_BalanceSheetLocationAxis
= us-gaap_OtherAssetsMember
/ us-gaap_DerivativeInstrumentRiskAxis
= hbia_InterestRateSwap1Member
 
Maturity   Nov. 09, 2020  
Interest Rate Swap 2 [Member] | Interest Expense [Member]      
Gain (Loss) Recognized in Other Comprehensive Income, Net [Abstract]      
Gain (Loss) reclassified from accumulated OCI into income (effective portion) 0us-gaap_DerivativeInstrumentsGainLossReclassifiedFromAccumulatedOCIIntoIncomeEffectivePortionNet
/ us-gaap_DerivativeInstrumentRiskAxis
= hbia_InterestRateSwap2Member
/ us-gaap_IncomeStatementLocationAxis
= us-gaap_InterestExpenseMember
0us-gaap_DerivativeInstrumentsGainLossReclassifiedFromAccumulatedOCIIntoIncomeEffectivePortionNet
/ us-gaap_DerivativeInstrumentRiskAxis
= hbia_InterestRateSwap2Member
/ us-gaap_IncomeStatementLocationAxis
= us-gaap_InterestExpenseMember
 
Interest Rate Swap 2 [Member] | Other Income [Member]      
Gain (Loss) Recognized in Other Comprehensive Income, Net [Abstract]      
Gain (Loss) recognized in income (ineffective portion) 0us-gaap_DerivativeNetHedgeIneffectivenessGainLoss
/ us-gaap_DerivativeInstrumentRiskAxis
= hbia_InterestRateSwap2Member
/ us-gaap_IncomeStatementLocationAxis
= us-gaap_OtherIncomeMember
0us-gaap_DerivativeNetHedgeIneffectivenessGainLoss
/ us-gaap_DerivativeInstrumentRiskAxis
= hbia_InterestRateSwap2Member
/ us-gaap_IncomeStatementLocationAxis
= us-gaap_OtherIncomeMember
 
Interest Rate Swap 2 [Member] | Accumulated Other Comprehensive Income (Loss) [Member]      
Gain (Loss) Recognized in Other Comprehensive Income, Net [Abstract]      
Gain (loss) recognized in other comprehensive income (effective portion) (380,000)us-gaap_DerivativeInstrumentsGainLossRecognizedInOtherComprehensiveIncomeEffectivePortionNet
/ us-gaap_BalanceSheetLocationAxis
= us-gaap_AccumulatedOtherComprehensiveIncomeMember
/ us-gaap_DerivativeInstrumentRiskAxis
= hbia_InterestRateSwap2Member
(1,448,000)us-gaap_DerivativeInstrumentsGainLossRecognizedInOtherComprehensiveIncomeEffectivePortionNet
/ us-gaap_BalanceSheetLocationAxis
= us-gaap_AccumulatedOtherComprehensiveIncomeMember
/ us-gaap_DerivativeInstrumentRiskAxis
= hbia_InterestRateSwap2Member
 
Interest Rate Swap 2 [Member] | Other Liabilities [Member]      
Derivative instrument according to type of hedges [Abstract]      
Notional Amount 25,000,000us-gaap_DerivativeAssetNotionalAmount
/ us-gaap_BalanceSheetLocationAxis
= us-gaap_OtherLiabilitiesMember
/ us-gaap_DerivativeInstrumentRiskAxis
= hbia_InterestRateSwap2Member
  25,000,000.00us-gaap_DerivativeAssetNotionalAmount
/ us-gaap_BalanceSheetLocationAxis
= us-gaap_OtherLiabilitiesMember
/ us-gaap_DerivativeInstrumentRiskAxis
= hbia_InterestRateSwap2Member
Fair Value (2,548,000)us-gaap_DerivativeFairValueOfDerivativeNet
/ us-gaap_BalanceSheetLocationAxis
= us-gaap_OtherLiabilitiesMember
/ us-gaap_DerivativeInstrumentRiskAxis
= hbia_InterestRateSwap2Member
   
Maturity Nov. 07, 2023    
Interest Rate Swap 2 [Member] | Other Assets [Member]      
Derivative instrument according to type of hedges [Abstract]      
Notional Amount   25,000,000us-gaap_DerivativeAssetNotionalAmount
/ us-gaap_BalanceSheetLocationAxis
= us-gaap_OtherAssetsMember
/ us-gaap_DerivativeInstrumentRiskAxis
= hbia_InterestRateSwap2Member
 
Fair Value   $ (1,932,000)us-gaap_DerivativeFairValueOfDerivativeNet
/ us-gaap_BalanceSheetLocationAxis
= us-gaap_OtherAssetsMember
/ us-gaap_DerivativeInstrumentRiskAxis
= hbia_InterestRateSwap2Member
 
Maturity   Nov. 07, 2023