Loans (Impaired Financing Receivables) (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Unpaid contractual principal balance $ 39,906 $ 50,521
Recorded investment with no allowance 35,171 45,587
Recorded investment with allowance 4,066 4,122
Total recorded investment 39,237 49,709
Related allowance 1,608 451
Average recorded investment 39,942 50,021
Interest income recognized 1,366 1,840
Commercial Loans [Member]    
Unpaid contractual principal balance 4,775 7,587
Recorded investment with no allowance 4,195 7,030
Recorded investment with allowance 380 406
Total recorded investment 4,575 7,436
Related allowance 330 155
Average recorded investment 4,524 7,196
Interest income recognized 251 252
Commercial Equipment [Member]    
Unpaid contractual principal balance 518 605
Recorded investment with no allowance 338 373
Recorded investment with allowance 139 213
Total recorded investment 477 586
Related allowance 139 123
Average recorded investment 491 623
Interest income recognized 9 23
Home Equity and Second Mortgage [Member]    
Unpaid contractual principal balance 154 708
Recorded investment with no allowance 154 649
Total recorded investment 154 649
Average recorded investment 163 630
Interest income recognized 8 19
Construction and Land Development [Member]    
Unpaid contractual principal balance 4,283 6,402
Recorded investment with no allowance 3,780 6,102
Recorded investment with allowance 504  
Total recorded investment 4,284 6,102
Related allowance 471  
Average recorded investment 4,302 6,474
Interest income recognized 13 133
Residential First Mortgages [Member]    
Unpaid contractual principal balance 4,747 3,407
Recorded investment with no allowance 4,070 2,526
Recorded investment with allowance 676 881
Total recorded investment 4,746 3,407
Related allowance 66 76
Average recorded investment 4,807 3,426
Interest income recognized 177 155
Commercial Real Estate [Member]    
Unpaid contractual principal balance 25,429 31,812
Recorded investment with no allowance 22,634 28,907
Recorded investment with allowance 2,367 2,622
Total recorded investment 25,001 31,529
Related allowance 602 97
Average recorded investment 25,655 31,672
Interest income recognized $ 908 $ 1,258