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Loans and Allowance for Loan Losses (Details 2) - USD ($)
$ in Thousands
Sep. 30, 2015
Dec. 31, 2014
Dec. 31, 2013
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Loans and Leases Receivable, Allowance $ 3,828 $ 3,880 $ 4,136
Commercial Real Estate Mortgage [Member]      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Loans and Leases Receivable, Allowance 94 182 319
Consumer Real Estate Mortgage [Member]      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Loans and Leases Receivable, Allowance 271 253 380
Construction and Land Development [Member]      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Loans and Leases Receivable, Allowance 104 269 430
Commercial and Industrial Loans [Member]      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Loans and Leases Receivable, Allowance 333 254 224
Consumer and Other Loans [Member]      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Loans and Leases Receivable, Allowance 0 7 236
Unallocated [Member]      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Loans and Leases Receivable, Allowance 3,026 2,915 $ 2,547
Performing Loans [Member]      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Loans and Leases Receivable, Allowance 3,570 3,646  
Performing Loans [Member] | Commercial Real Estate Mortgage [Member]      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Loans and Leases Receivable, Allowance 94 182  
Performing Loans [Member] | Consumer Real Estate Mortgage [Member]      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Loans and Leases Receivable, Allowance 271 250  
Performing Loans [Member] | Construction and Land Development [Member]      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Loans and Leases Receivable, Allowance 104 209  
Performing Loans [Member] | Commercial and Industrial Loans [Member]      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Loans and Leases Receivable, Allowance 75 83  
Performing Loans [Member] | Consumer and Other Loans [Member]      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Loans and Leases Receivable, Allowance 0 7  
Performing Loans [Member] | Unallocated [Member]      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Loans and Leases Receivable, Allowance 3,026 2,915  
Impaired Loans [Member]      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Loans and Leases Receivable, Allowance 258 234  
Impaired Loans [Member] | Commercial Real Estate Mortgage [Member]      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Loans and Leases Receivable, Allowance 0 0  
Impaired Loans [Member] | Consumer Real Estate Mortgage [Member]      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Loans and Leases Receivable, Allowance 0 3  
Impaired Loans [Member] | Construction and Land Development [Member]      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Loans and Leases Receivable, Allowance 0 60  
Impaired Loans [Member] | Commercial and Industrial Loans [Member]      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Loans and Leases Receivable, Allowance 258 171  
Impaired Loans [Member] | Consumer and Other Loans [Member]      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Loans and Leases Receivable, Allowance 0 0  
Impaired Loans [Member] | Unallocated [Member]      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Loans and Leases Receivable, Allowance $ 0 $ 0