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Loans and Allowance for Loan Losses, Impaired Financing Receivable (Details) - USD ($)
3 Months Ended
Mar. 31, 2017
Mar. 31, 2016
Dec. 31, 2016
Financing Receivable, Impaired [Line Items]      
Recorded investment $ 25,050,000   $ 27,577,000
Unpaid principal balance [1] 28,550,000   31,612,000
Related allowance [2] 1,852,000   1,071,000
Average recorded investment 26,314,000 $ 43,740,000  
Interest income recognized 49,311 31,000  
Interest income from cash payments received 49,311 31,000  
Collateral Dependent Impaired Loans [Member]      
Financing Receivable, Impaired [Line Items]      
Recorded investment 12,076,000   14,689,000
Unpaid principal balance [1] 12,125,000   14,769,000
Related allowance [2] 0   0
Average recorded investment 12,706,000 31,473,000  
Interest income recognized 49,311 31,000  
Collateral Dependent Impaired Loans [Member] | Commercial Real Estate - Mortgage [Member]      
Financing Receivable, Impaired [Line Items]      
Recorded investment 2,283,000   2,308,000
Unpaid principal balance [1] 2,280,000   2,312,000
Related allowance [2] 0   0
Average recorded investment 2,100,000 3,854,000  
Interest income recognized 0 0  
Collateral Dependent Impaired Loans [Member] | Consumer Real Estate - Mortgage [Member]      
Financing Receivable, Impaired [Line Items]      
Recorded investment 2,513,000   2,880,000
Unpaid principal balance [1] 2,544,000   2,915,000
Related allowance [2] 0   0
Average recorded investment 2,216,000 4,462,000  
Interest income recognized 0 0  
Collateral Dependent Impaired Loans [Member] | Construction and Land Development [Member]      
Financing Receivable, Impaired [Line Items]      
Recorded investment 1,028,000   3,128,000
Unpaid principal balance [1] 1,035,000   3,135,000
Related allowance [2] 0   0
Average recorded investment 2,078,000 7,320,000  
Interest income recognized 49,311 31,000  
Collateral Dependent Impaired Loans [Member] | Commercial and Industrial [Member]      
Financing Receivable, Impaired [Line Items]      
Recorded investment 6,252,000   6,373,000
Unpaid principal balance [1] 6,266,000   6,407,000
Related allowance [2] 0   0
Average recorded investment 6,312,000 15,451,000  
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 [1] 0   0
Related allowance [2] 0   0
Average recorded investment 0 386,000  
Interest income recognized 0 0  
Cash Flow Dependent Impaired Loans [Member]      
Financing Receivable, Impaired [Line Items]      
Recorded investment 12,974,000   12,888,000
Unpaid principal balance [1] 16,425,000   16,843,000
Related allowance [2] 1,852,000   1,071,000
Average recorded investment 13,608,000 12,267,000  
Interest income recognized 0 0  
Cash Flow Dependent Impaired Loans [Member] | Commercial Real Estate - Mortgage [Member]      
Financing Receivable, Impaired [Line Items]      
Recorded investment 1,767,000   2,613,000
Unpaid principal balance [1] 2,465,000   3,349,000
Related allowance [2] 63,000   59,000
Average recorded investment 2,386,000 1,548,000  
Interest income recognized 0 0  
Cash Flow Dependent Impaired Loans [Member] | Consumer Real Estate - Mortgage [Member]      
Financing Receivable, Impaired [Line Items]      
Recorded investment 6,296,000   5,193,000
Unpaid principal balance [1] 6,883,000   5,775,000
Related allowance [2] 1,085,000   688,000
Average recorded investment 6,225,000 5,815,000  
Interest income recognized 0 0  
Cash Flow Dependent Impaired Loans [Member] | Construction and Land Development [Member]      
Financing Receivable, Impaired [Line Items]      
Recorded investment 3,083,000   3,485,000
Unpaid principal balance [1] 3,756,000   4,154,000
Related allowance [2] 19,000   20,000
Average recorded investment 3,284,000 74,000  
Interest income recognized 0 0  
Cash Flow Dependent Impaired Loans [Member] | Commercial and Industrial [Member]      
Financing Receivable, Impaired [Line Items]      
Recorded investment 1,006,000   1,122,000
Unpaid principal balance [1] 2,379,000   2,714,000
Related allowance [2] 220,000   77,000
Average recorded investment 1,064,000 1,128,000  
Interest income recognized 0 0  
Cash Flow Dependent Impaired Loans [Member] | Consumer and Other [Member]      
Financing Receivable, Impaired [Line Items]      
Recorded investment 822,000   475,000
Unpaid principal balance [1] 942,000   851,000
Related allowance [2] 465,000   $ 227,000
Average recorded investment 649,000 3,702,000  
Interest income recognized $ 0 $ 0  
[1] Unpaid principal balance presented net of fair value adjustments recorded in conjunction with purchase accounting.
[2] Collateral dependent loans are typically charged-off to their net realizable value and no specific allowance is carried related to those loans.