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Loans - Summary of Breakdown of the Company's Loan Portfolio by Credit Quality Indicators (Detail) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Financing Receivable, Recorded Investment [Line Items]      
Total Loans $ 622,790us-gaap_LoansAndLeasesReceivableGrossCarryingAmount $ 504,095us-gaap_LoansAndLeasesReceivableGrossCarryingAmount $ 288,753us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
Construction and development [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Total Loans 71,350us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_MortgageLoansOnRealEstateDescriptionLoanCategoryAxis
= us-gaap_ConstructionLoansMember		 63,170us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_MortgageLoansOnRealEstateDescriptionLoanCategoryAxis
= us-gaap_ConstructionLoansMember		 20,271us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_MortgageLoansOnRealEstateDescriptionLoanCategoryAxis
= us-gaap_ConstructionLoansMember
Mortgage Loans on Real Estate      
Financing Receivable, Recorded Investment [Line Items]      
Total Loans 454,304us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_InvestmentTypeAxis
= us-gaap_MortgageLoansOnRealEstateMember		 340,334us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_InvestmentTypeAxis
= us-gaap_MortgageLoansOnRealEstateMember		  
Mortgage Loans on Real Estate | Construction and development [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Total Loans 71,350us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_InvestmentTypeAxis
= us-gaap_MortgageLoansOnRealEstateMember
/ us-gaap_MortgageLoansOnRealEstateDescriptionLoanCategoryAxis
= us-gaap_ConstructionLoansMember		 63,170us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_InvestmentTypeAxis
= us-gaap_MortgageLoansOnRealEstateMember
/ us-gaap_MortgageLoansOnRealEstateDescriptionLoanCategoryAxis
= us-gaap_ConstructionLoansMember		  
Mortgage Loans on Real Estate | 1-4 Family residential [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Total Loans 137,519us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_InvestmentTypeAxis
= us-gaap_MortgageLoansOnRealEstateMember
/ us-gaap_MortgageLoansOnRealEstateDescriptionLoanCategoryAxis
= istr_OneToFourFamilyMember		 104,685us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_InvestmentTypeAxis
= us-gaap_MortgageLoansOnRealEstateMember
/ us-gaap_MortgageLoansOnRealEstateDescriptionLoanCategoryAxis
= istr_OneToFourFamilyMember		  
Mortgage Loans on Real Estate | Multifamily [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Total Loans 17,458us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_InvestmentTypeAxis
= us-gaap_MortgageLoansOnRealEstateMember
/ us-gaap_MortgageLoansOnRealEstateDescriptionLoanCategoryAxis
= istr_MultiFamilyRealEstateLoansMember		 14,286us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_InvestmentTypeAxis
= us-gaap_MortgageLoansOnRealEstateMember
/ us-gaap_MortgageLoansOnRealEstateDescriptionLoanCategoryAxis
= istr_MultiFamilyRealEstateLoansMember		  
Mortgage Loans on Real Estate | Farmland [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Total Loans 2,919us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_InvestmentTypeAxis
= us-gaap_MortgageLoansOnRealEstateMember
/ us-gaap_MortgageLoansOnRealEstateDescriptionLoanCategoryAxis
= istr_RealEstateFarmlandMember		 830us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_InvestmentTypeAxis
= us-gaap_MortgageLoansOnRealEstateMember
/ us-gaap_MortgageLoansOnRealEstateDescriptionLoanCategoryAxis
= istr_RealEstateFarmlandMember		  
Mortgage Loans on Real Estate | Nonfarm, nonresidential [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Total Loans 225,058us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_InvestmentTypeAxis
= us-gaap_MortgageLoansOnRealEstateMember
/ us-gaap_MortgageLoansOnRealEstateDescriptionLoanCategoryAxis
= istr_NonFarmNonresidentialMember		 157,363us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_InvestmentTypeAxis
= us-gaap_MortgageLoansOnRealEstateMember
/ us-gaap_MortgageLoansOnRealEstateDescriptionLoanCategoryAxis
= istr_NonFarmNonresidentialMember		  
Commercial and industrial [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Total Loans 54,187us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_FinancialInstrumentAxis
= istr_CommercialAndIndustrialLoansMember		 32,665us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_FinancialInstrumentAxis
= istr_CommercialAndIndustrialLoansMember		  
Consumer [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Total Loans 114,299us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_FinancialInstrumentAxis
= us-gaap_ConsumerLoanMember		 131,096us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_FinancialInstrumentAxis
= us-gaap_ConsumerLoanMember		 96,609us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_FinancialInstrumentAxis
= us-gaap_ConsumerLoanMember
Pass [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Total Loans 616,612us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_PassMember		 498,659us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_PassMember		  
Pass [Member] | Mortgage Loans on Real Estate      
Financing Receivable, Recorded Investment [Line Items]      
Total Loans 448,773us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_PassMember
/ us-gaap_InvestmentTypeAxis
= us-gaap_MortgageLoansOnRealEstateMember		 335,404us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_PassMember
/ us-gaap_InvestmentTypeAxis
= us-gaap_MortgageLoansOnRealEstateMember		  
Pass [Member] | Mortgage Loans on Real Estate | Construction and development [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Total Loans 69,361us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_PassMember
/ us-gaap_InvestmentTypeAxis
= us-gaap_MortgageLoansOnRealEstateMember
/ us-gaap_MortgageLoansOnRealEstateDescriptionLoanCategoryAxis
= us-gaap_ConstructionLoansMember		 61,399us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_PassMember
/ us-gaap_InvestmentTypeAxis
= us-gaap_MortgageLoansOnRealEstateMember
/ us-gaap_MortgageLoansOnRealEstateDescriptionLoanCategoryAxis
= us-gaap_ConstructionLoansMember		  
Pass [Member] | Mortgage Loans on Real Estate | 1-4 Family residential [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Total Loans 135,898us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_PassMember
/ us-gaap_InvestmentTypeAxis
= us-gaap_MortgageLoansOnRealEstateMember
/ us-gaap_MortgageLoansOnRealEstateDescriptionLoanCategoryAxis
= istr_OneToFourFamilyMember		 103,408us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_PassMember
/ us-gaap_InvestmentTypeAxis
= us-gaap_MortgageLoansOnRealEstateMember
/ us-gaap_MortgageLoansOnRealEstateDescriptionLoanCategoryAxis
= istr_OneToFourFamilyMember		  
Pass [Member] | Mortgage Loans on Real Estate | Multifamily [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Total Loans 16,403us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_PassMember
/ us-gaap_InvestmentTypeAxis
= us-gaap_MortgageLoansOnRealEstateMember
/ us-gaap_MortgageLoansOnRealEstateDescriptionLoanCategoryAxis
= istr_MultiFamilyRealEstateLoansMember		 13,319us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_PassMember
/ us-gaap_InvestmentTypeAxis
= us-gaap_MortgageLoansOnRealEstateMember
/ us-gaap_MortgageLoansOnRealEstateDescriptionLoanCategoryAxis
= istr_MultiFamilyRealEstateLoansMember		  
Pass [Member] | Mortgage Loans on Real Estate | Farmland [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Total Loans 2,919us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_PassMember
/ us-gaap_InvestmentTypeAxis
= us-gaap_MortgageLoansOnRealEstateMember
/ us-gaap_MortgageLoansOnRealEstateDescriptionLoanCategoryAxis
= istr_RealEstateFarmlandMember		 830us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_PassMember
/ us-gaap_InvestmentTypeAxis
= us-gaap_MortgageLoansOnRealEstateMember
/ us-gaap_MortgageLoansOnRealEstateDescriptionLoanCategoryAxis
= istr_RealEstateFarmlandMember		  
Pass [Member] | Mortgage Loans on Real Estate | Nonfarm, nonresidential [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Total Loans 224,192us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_PassMember
/ us-gaap_InvestmentTypeAxis
= us-gaap_MortgageLoansOnRealEstateMember
/ us-gaap_MortgageLoansOnRealEstateDescriptionLoanCategoryAxis
= istr_NonFarmNonresidentialMember		 156,448us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_PassMember
/ us-gaap_InvestmentTypeAxis
= us-gaap_MortgageLoansOnRealEstateMember
/ us-gaap_MortgageLoansOnRealEstateDescriptionLoanCategoryAxis
= istr_NonFarmNonresidentialMember		  
Pass [Member] | Commercial and industrial [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Total Loans 54,007us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_FinancialInstrumentAxis
= istr_CommercialAndIndustrialLoansMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_PassMember		 32,538us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_FinancialInstrumentAxis
= istr_CommercialAndIndustrialLoansMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_PassMember		  
Pass [Member] | Consumer [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Total Loans 113,832us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_FinancialInstrumentAxis
= us-gaap_ConsumerLoanMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_PassMember		 130,717us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_FinancialInstrumentAxis
= us-gaap_ConsumerLoanMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_PassMember		  
Special Mention [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Total Loans 548us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_SpecialMentionMember		 1,224us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_SpecialMentionMember		  
Special Mention [Member] | Mortgage Loans on Real Estate      
Financing Receivable, Recorded Investment [Line Items]      
Total Loans 340us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_SpecialMentionMember
/ us-gaap_InvestmentTypeAxis
= us-gaap_MortgageLoansOnRealEstateMember		 991us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_SpecialMentionMember
/ us-gaap_InvestmentTypeAxis
= us-gaap_MortgageLoansOnRealEstateMember		  
Special Mention [Member] | Mortgage Loans on Real Estate | Construction and development [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Total Loans 340us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_SpecialMentionMember
/ us-gaap_InvestmentTypeAxis
= us-gaap_MortgageLoansOnRealEstateMember
/ us-gaap_MortgageLoansOnRealEstateDescriptionLoanCategoryAxis
= us-gaap_ConstructionLoansMember		 362us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_SpecialMentionMember
/ us-gaap_InvestmentTypeAxis
= us-gaap_MortgageLoansOnRealEstateMember
/ us-gaap_MortgageLoansOnRealEstateDescriptionLoanCategoryAxis
= us-gaap_ConstructionLoansMember		  
Special Mention [Member] | Mortgage Loans on Real Estate | 1-4 Family residential [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Total Loans   259us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_SpecialMentionMember
/ us-gaap_InvestmentTypeAxis
= us-gaap_MortgageLoansOnRealEstateMember
/ us-gaap_MortgageLoansOnRealEstateDescriptionLoanCategoryAxis
= istr_OneToFourFamilyMember		  
Special Mention [Member] | Mortgage Loans on Real Estate | Nonfarm, nonresidential [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Total Loans   370us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_SpecialMentionMember
/ us-gaap_InvestmentTypeAxis
= us-gaap_MortgageLoansOnRealEstateMember
/ us-gaap_MortgageLoansOnRealEstateDescriptionLoanCategoryAxis
= istr_NonFarmNonresidentialMember		  
Special Mention [Member] | Commercial and industrial [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Total Loans   5us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_FinancialInstrumentAxis
= istr_CommercialAndIndustrialLoansMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_SpecialMentionMember		  
Special Mention [Member] | Consumer [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Total Loans 208us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_FinancialInstrumentAxis
= us-gaap_ConsumerLoanMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_SpecialMentionMember		 228us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_FinancialInstrumentAxis
= us-gaap_ConsumerLoanMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_SpecialMentionMember		  
Substandard [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Total Loans 5,630us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_SubstandardMember		 4,212us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_SubstandardMember		  
Substandard [Member] | Mortgage Loans on Real Estate      
Financing Receivable, Recorded Investment [Line Items]      
Total Loans 5,191us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_SubstandardMember
/ us-gaap_InvestmentTypeAxis
= us-gaap_MortgageLoansOnRealEstateMember		 3,939us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_SubstandardMember
/ us-gaap_InvestmentTypeAxis
= us-gaap_MortgageLoansOnRealEstateMember		  
Substandard [Member] | Mortgage Loans on Real Estate | Construction and development [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Total Loans 1,649us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_SubstandardMember
/ us-gaap_InvestmentTypeAxis
= us-gaap_MortgageLoansOnRealEstateMember
/ us-gaap_MortgageLoansOnRealEstateDescriptionLoanCategoryAxis
= us-gaap_ConstructionLoansMember		 1,409us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_SubstandardMember
/ us-gaap_InvestmentTypeAxis
= us-gaap_MortgageLoansOnRealEstateMember
/ us-gaap_MortgageLoansOnRealEstateDescriptionLoanCategoryAxis
= us-gaap_ConstructionLoansMember		  
Substandard [Member] | Mortgage Loans on Real Estate | 1-4 Family residential [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Total Loans 1,621us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_SubstandardMember
/ us-gaap_InvestmentTypeAxis
= us-gaap_MortgageLoansOnRealEstateMember
/ us-gaap_MortgageLoansOnRealEstateDescriptionLoanCategoryAxis
= istr_OneToFourFamilyMember		 1,018us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_SubstandardMember
/ us-gaap_InvestmentTypeAxis
= us-gaap_MortgageLoansOnRealEstateMember
/ us-gaap_MortgageLoansOnRealEstateDescriptionLoanCategoryAxis
= istr_OneToFourFamilyMember		  
Substandard [Member] | Mortgage Loans on Real Estate | Multifamily [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Total Loans 1,055us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_SubstandardMember
/ us-gaap_InvestmentTypeAxis
= us-gaap_MortgageLoansOnRealEstateMember
/ us-gaap_MortgageLoansOnRealEstateDescriptionLoanCategoryAxis
= istr_MultiFamilyRealEstateLoansMember		 967us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_SubstandardMember
/ us-gaap_InvestmentTypeAxis
= us-gaap_MortgageLoansOnRealEstateMember
/ us-gaap_MortgageLoansOnRealEstateDescriptionLoanCategoryAxis
= istr_MultiFamilyRealEstateLoansMember		  
Substandard [Member] | Mortgage Loans on Real Estate | Nonfarm, nonresidential [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Total Loans 866us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_SubstandardMember
/ us-gaap_InvestmentTypeAxis
= us-gaap_MortgageLoansOnRealEstateMember
/ us-gaap_MortgageLoansOnRealEstateDescriptionLoanCategoryAxis
= istr_NonFarmNonresidentialMember		 545us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_SubstandardMember
/ us-gaap_InvestmentTypeAxis
= us-gaap_MortgageLoansOnRealEstateMember
/ us-gaap_MortgageLoansOnRealEstateDescriptionLoanCategoryAxis
= istr_NonFarmNonresidentialMember		  
Substandard [Member] | Commercial and industrial [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Total Loans 180us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_FinancialInstrumentAxis
= istr_CommercialAndIndustrialLoansMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_SubstandardMember		 122us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_FinancialInstrumentAxis
= istr_CommercialAndIndustrialLoansMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_SubstandardMember		  
Substandard [Member] | Consumer [Member]      
Financing Receivable, Recorded Investment [Line Items]      
Total Loans $ 259us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_FinancialInstrumentAxis
= us-gaap_ConsumerLoanMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_SubstandardMember		 $ 151us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
/ us-gaap_FinancialInstrumentAxis
= us-gaap_ConsumerLoanMember
/ us-gaap_InternalCreditAssessmentAxis
= us-gaap_SubstandardMember