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Loans and Allowance for Loan Losses, Impaired Financing Receivable (Details) - USD ($)
 9 Months Ended 12 Months Ended
Sep. 30, 2015
Dec. 31, 2014
Financing Receivable, Impaired [Line Items]    
Recorded investment $ 30,049,000 $ 16,705,000
Unpaid principal balance 40,380,000 18,352,000
Related allowance [1] 2,150,000 1,155,000
Average recorded investment 34,347,000 17,463,000
Interest income recognized 253,000.00 256,000
Interest income from cash payments received 253,000 256,000
Collateral Dependent Impaired Loans [Member]    
Financing Receivable, Impaired [Line Items]    
Recorded investment 18,682,000 10,029,000
Unpaid principal balance 25,212,000 11,156,000
Related allowance [1] 0 0
Average recorded investment 21,027,000 10,753,000
Interest income recognized 253,000.00 256,000
Collateral Dependent Impaired Loans [Member] | Commercial Real Estate - Mortgage [Member]    
Financing Receivable, Impaired [Line Items]    
Recorded investment 5,698,000 2,422,000
Unpaid principal balance 7,249,000 2,641,000
Related allowance [1] 0 0
Average recorded investment 5,983,000 2,624,000
Interest income recognized 69,000 0
Collateral Dependent Impaired Loans [Member] | Consumer Real Estate - Mortgage [Member]    
Financing Receivable, Impaired [Line Items]    
Recorded investment 5,582,000 1,472,000
Unpaid principal balance 6,249,000 1,901,000
Related allowance [1] 0 0
Average recorded investment 5,107,000 1,552,000
Interest income recognized 0 0
Collateral Dependent Impaired Loans [Member] | Construction and Land Development [Member]    
Financing Receivable, Impaired [Line Items]    
Recorded investment 6,414,000 4,810,000
Unpaid principal balance 6,940,000 4,810,000
Related allowance [1] 0 0
Average recorded investment 7,017,000 5,016,000
Interest income recognized 184,000.00 256,000
Collateral Dependent Impaired Loans [Member] | Commercial and Industrial [Member]    
Financing Receivable, Impaired [Line Items]    
Recorded investment 988,000 1,325,000
Unpaid principal balance 4,114,000 1,804,000
Related allowance [1] 0 0
Average recorded investment 2,260,000 1,561,000
Interest income recognized 0 0
Collateral Dependent Impaired Loans [Member] | Consumer and Other [Member]    
Financing Receivable, Impaired [Line Items]    
Recorded investment 0 0
Unpaid principal balance 660,000 0
Related allowance [1] 0 0
Average recorded investment 660,000 0
Interest income recognized 0 0
Cash Flow Dependent Impaired Loans [Member]    
Financing Receivable, Impaired [Line Items]    
Recorded investment 11,367,000 6,676,000
Unpaid principal balance 15,168,000 7,196,000
Related allowance [1] 2,150,000 1,155,000
Average recorded investment 13,320,000 6,710,000
Interest income recognized 0 0
Cash Flow Dependent Impaired Loans [Member] | Commercial Real Estate - Mortgage [Member]    
Financing Receivable, Impaired [Line Items]    
Recorded investment 1,534,000 1,891,000
Unpaid principal balance 1,827,000 2,107,000
Related allowance [1] 49,000 108,000
Average recorded investment 2,115,000 1,958,000
Interest income recognized 0 0
Cash Flow Dependent Impaired Loans [Member] | Consumer Real Estate - Mortgage [Member]    
Financing Receivable, Impaired [Line Items]    
Recorded investment 3,839,000 2,986,000
Unpaid principal balance 4,343,000 3,205,000
Related allowance [1] 743,000 654,000
Average recorded investment 4,081,000 3,080,000
Interest income recognized 0 0
Cash Flow Dependent Impaired Loans [Member] | Construction and Land Development [Member]    
Financing Receivable, Impaired [Line Items]    
Recorded investment 84,000 363,000
Unpaid principal balance 2,685,000 406,000
Related allowance [1] 18,000 79,000
Average recorded investment 104,000 384,000
Interest income recognized 0 0
Cash Flow Dependent Impaired Loans [Member] | Commercial and Industrial [Member]    
Financing Receivable, Impaired [Line Items]    
Recorded investment 134,000 284,000
Unpaid principal balance 137,000 294,000
Related allowance [1] 27,000 62,000
Average recorded investment 394,000 316,000
Interest income recognized 0 0
Cash Flow Dependent Impaired Loans [Member] | Consumer and Other [Member]    
Financing Receivable, Impaired [Line Items]    
Recorded investment 5,776,000 1,152,000
Unpaid principal balance 6,176,000 1,184,000
Related allowance [1] 1,313,000 252,000
Average recorded investment 6,626,000 972,000
Interest income recognized $ 0 $ 0
[1] Collateral dependent loans are typically charged-off to their net realizable value and no specific allowance is carried related to those loans.