XML 141 R82.htm IDEA: XBRL DOCUMENT v2.4.1.9
FHLB Advances and Other Borrowings (Narrative) (Details) (USD $)
12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Advances from Federal Home Loan Banks [Abstract]    
Federal Home Loan Bank, Advances, Branch of FHLB Bank, Interest Rate, Range from 0.35%us-gaap_FederalHomeLoanBankAdvancesBranchOfFHLBBankInterestRateRangeFrom 0.35%us-gaap_FederalHomeLoanBankAdvancesBranchOfFHLBBankInterestRateRangeFrom
Federal Home Loan Bank, Advances, Branch of FHLB Bank, Interest Rate, Range to 7.22%us-gaap_FederalHomeLoanBankAdvancesBranchOfFHLBBankInterestRateRangeTo 7.22%us-gaap_FederalHomeLoanBankAdvancesBranchOfFHLBBankInterestRateRangeTo
Federal Home Loan Bank, Advances, Branch of FHLB Bank, Weighted Average Interest Rate 1.16%us-gaap_FederalHomeLoanBankAdvancesBranchOfFHLBBankWeightedAverageInterestRate 0.95%us-gaap_FederalHomeLoanBankAdvancesBranchOfFHLBBankWeightedAverageInterestRate
Debt Instrument [Line Items]    
Long-term Borrowings $ 64,591,000us-gaap_LongTermDebt $ 87,237,000us-gaap_LongTermDebt
Percentage of Variable Rate 2.875%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1 2.875%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
Line of Credit Facility, Maximum Borrowing Capacity 10,000,000us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity 10,000,000us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
Line of Credit Facility, Amount Outstanding 0us-gaap_LineOfCreditFacilityAmountOutstanding 0us-gaap_LineOfCreditFacilityAmountOutstanding
Line of Credit Facility, Expiration Date Dec. 29, 2015  
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage 0.25%us-gaap_LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage  
Junior Subordinated Debt For Tier One Capital Purposes 5,017,000gabc_JuniorSubordinatedDebtForTierOneCapitalPurposes 4,871,000gabc_JuniorSubordinatedDebtForTierOneCapitalPurposes
Term Loan [Member]    
Debt Instrument [Line Items]    
Long-term Borrowings $ 4,000,000us-gaap_LongTermDebt
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_MediumTermNotesMember
$ 7,000,000us-gaap_LongTermDebt
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_MediumTermNotesMember
Percentage of Variable Rate 2.875%us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_MediumTermNotesMember
 
Maturity Date Dec. 31, 2015