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OFF-BALANCE SHEET ACTIVITIES AND COMMITMENTS (Details) (USD $)
12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Unused lines of credit    
OFF-BALANCE SHEET ACTIVITIES AND COMMITMENTS    
Financial instruments with off-balance sheet risk 88,740,793us-gaap_FairValueDisclosureOffbalanceSheetRisksFaceAmountLiability
/ us-gaap_FinancialInstrumentAxis
= us-gaap_UnusedLinesOfCreditMember
$ 85,654,871us-gaap_FairValueDisclosureOffbalanceSheetRisksFaceAmountLiability
/ us-gaap_FinancialInstrumentAxis
= us-gaap_UnusedLinesOfCreditMember
Commitments to make loans    
OFF-BALANCE SHEET ACTIVITIES AND COMMITMENTS    
Financial instruments with off-balance sheet risk 6,177,898us-gaap_FairValueDisclosureOffbalanceSheetRisksFaceAmountLiability
/ us-gaap_FinancialInstrumentAxis
= us-gaap_LoanOriginationCommitmentsMember
3,481,833us-gaap_FairValueDisclosureOffbalanceSheetRisksFaceAmountLiability
/ us-gaap_FinancialInstrumentAxis
= us-gaap_LoanOriginationCommitmentsMember
Commitments to make loans | Minimum    
OFF-BALANCE SHEET ACTIVITIES AND COMMITMENTS    
Fixed rates (as a percent) 2.75%ktyb_LoansCommitmentsFixedRates
/ us-gaap_FinancialInstrumentAxis
= us-gaap_LoanOriginationCommitmentsMember
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
 
Maturities of fixed rate loan commitments 1 year  
Commitments to make loans | Maximum    
OFF-BALANCE SHEET ACTIVITIES AND COMMITMENTS    
Period of commitments to make loans 60 days  
Fixed rates (as a percent) 5.00%ktyb_LoansCommitmentsFixedRates
/ us-gaap_FinancialInstrumentAxis
= us-gaap_LoanOriginationCommitmentsMember
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
 
Maturities of fixed rate loan commitments 30 years  
Letters of credit    
OFF-BALANCE SHEET ACTIVITIES AND COMMITMENTS    
Financial instruments with off-balance sheet risk 441,376us-gaap_FairValueDisclosureOffbalanceSheetRisksFaceAmountLiability
/ us-gaap_FinancialInstrumentAxis
= us-gaap_LetterOfCreditMember
$ 554,000us-gaap_FairValueDisclosureOffbalanceSheetRisksFaceAmountLiability
/ us-gaap_FinancialInstrumentAxis
= us-gaap_LetterOfCreditMember