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Loans and the Allowance for Loan Losses, Activity In Period (Details)
$ in Thousands
12 Months Ended
Dec. 31, 2016
USD ($)
Period
Dec. 31, 2015
USD ($)
Period
Allowance for loan losses by segment [Roll Forward]    
Beginning Balance $ 7,738 $ 7,075
Charges-offs (1,770) (897)
Recoveries 347 535
Provision for loan losses 1,930 1,025
Ending balance 8,245 7,738
Ending balances individually evaluated for impairment 800 798
Ending balances collectively evaluated for impairment 7,445 6,940
Loan Balances [Abstract]    
Ending balance individually evaluated for impairment 20,056 13,050
Ending balance collectively evaluated for impairment 583,826 555,425
Ending balance 603,882 $ 568,475
Changes in Accounting Methodology [Abstract]    
Calculated provision based on current methodology 1,930  
Calculated provision based on prior methodology 2,257  
Changes for allowance for loan losses $ (327)  
Loan Rates, Migration Analysis Period | Period 4 1
Allowance for Loan and Lease Losses, Period Increase (Decrease) $ 77  
Allowance for Loan and Lease Losses Loans Percentage 1.37% 1.36%
Commercial [Member]    
Allowance for loan losses by segment [Roll Forward]    
Beginning Balance $ 633 $ 595
Charges-offs (915) (293)
Recoveries 79 50
Provision for loan losses 1,696 281
Ending balance 1,493 633
Ending balances individually evaluated for impairment 271 8
Ending balances collectively evaluated for impairment 1,222 625
Loan Balances [Abstract]    
Ending balance individually evaluated for impairment 989 275
Ending balance collectively evaluated for impairment 53,445 42,922
Ending balance 54,434 43,197
Changes in Accounting Methodology [Abstract]    
Calculated provision based on current methodology 1,696  
Calculated provision based on prior methodology 2,054  
Changes for allowance for loan losses (358)  
Real Estate - Construction [Member]    
Allowance for loan losses by segment [Roll Forward]    
Beginning Balance 985 703
Charges-offs 0 0
Recoveries 3 1
Provision for loan losses (142) 281
Ending balance 846 985
Ending balances individually evaluated for impairment 22 36
Ending balances collectively evaluated for impairment 824 949
Loan Balances [Abstract]    
Ending balance individually evaluated for impairment 624 99
Ending balance collectively evaluated for impairment 22,492 19,586
Ending balance 23,116 19,685
Changes in Accounting Methodology [Abstract]    
Calculated provision based on current methodology (142)  
Calculated provision based on prior methodology (858)  
Changes for allowance for loan losses 716  
Real Estate - Mortgage [Member]    
Allowance for loan losses by segment [Roll Forward]    
Beginning Balance 5,628 5,347
Charges-offs (504) (321)
Recoveries 197 393
Provision for loan losses (54) 209
Ending balance 5,267 5,628
Ending balances individually evaluated for impairment 507 754
Ending balances collectively evaluated for impairment 4,760 4,874
Loan Balances [Abstract]    
Ending balance individually evaluated for impairment 18,362 12,664
Ending balance collectively evaluated for impairment 430,046 424,495
Ending balance 448,408 437,159
Changes in Accounting Methodology [Abstract]    
Calculated provision based on current methodology (54)  
Calculated provision based on prior methodology 73  
Changes for allowance for loan losses (127)  
Consumer [Member]    
Allowance for loan losses by segment [Roll Forward]    
Beginning Balance 279 219
Charges-offs (204) (92)
Recoveries 28 39
Provision for loan losses 352 113
Ending balance 455 279
Ending balances individually evaluated for impairment 0 0
Ending balances collectively evaluated for impairment 455 279
Loan Balances [Abstract]    
Ending balance individually evaluated for impairment 81 12
Ending balance collectively evaluated for impairment 58,826 50,415
Ending balance 58,907 50,427
Changes in Accounting Methodology [Abstract]    
Calculated provision based on current methodology 352  
Calculated provision based on prior methodology 910  
Changes for allowance for loan losses (558)  
Other [Member]    
Allowance for loan losses by segment [Roll Forward]    
Beginning Balance 213 211
Charges-offs (147) (191)
Recoveries 40 52
Provision for loan losses 78 141
Ending balance 184 213
Ending balances individually evaluated for impairment 0 0
Ending balances collectively evaluated for impairment 184 213
Loan Balances [Abstract]    
Ending balance individually evaluated for impairment 0 0
Ending balance collectively evaluated for impairment 19,017 18,007
Ending balance 19,017 $ 18,007
Changes in Accounting Methodology [Abstract]    
Calculated provision based on current methodology 78  
Calculated provision based on prior methodology 78  
Changes for allowance for loan losses 0  
Commercial Loan, Sub-segment [Member]    
Changes in Accounting Methodology [Abstract]    
Allowance for Loan and Lease Losses, Period Increase (Decrease) (366)  
Student Loans [Member]    
Changes in Accounting Methodology [Abstract]    
Allowance for Loan and Lease Losses, Period Increase (Decrease) $ (38)